Engine Mechanical - 5.7l (ls6) Cadillac CTS I

Fastener Tightening Specifications

Fastener Tightening Specifications

Engine Mechanical Specifications (LS6)

Engine Mechanical Specifications (LS6)

Sealers, Adhesives, and Lubricants

Sealers, Adhesives, and Lubricants

Scheme 72

Engine Block - Front View

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Engine Block - Rear View

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Engine Block - Left Side View

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Engine Block - Right Side View

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Engine Block - Bottom View

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Engine Block - Top View

Scheme 78

Cylinder Head - Top View

Scheme 79

Cylinder Head - End View

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Cylinder Head - Exhaust Manifold Deck View

Scheme 81

Cylinder Head - Intake Manifold Deck View

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Scheme 89

The vehicle identification number (VIN) is located on the left side rear of the engine block (1 or 2) and is typically a nine digit number stamped or laser-etched onto the engine at the vehicle assembly plant.

1. The first digit identifies the division.
2. The second digit identifies the model year.
3. The third digit identifies the assembly plant.
4. The fourth through ninth digits are the last six digits of the VIN.

Diagnostic Starting Point - Engine Mechanical

Begin the system diagnosis by reviewing the Disassembled Views , Engine Component Description , Lubrication Description , New Product Information . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation. Refer to Symptoms - Engine Mechanical in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Strategy Based Diagnostics

1. Perform the «Diagnostic System Check - Engine Controls»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-diagnostic-information-procedures) in Engine Controls - 5.7L before using the symptom tables, if applicable.
2. Review the system operations in order to familiarize yourself with the system functions. Refer to «Disassembled Views»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) , «Engine Component Description»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) , «Lubrication Description»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) and «New Product Information»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__new-product-information) .

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis in General Information.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the engine. Refer to «Checking Aftermarket Accessories»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Check for the correct oil level, proper oil viscosity, and correct filter application.
4. Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, ambient temperature, engine temperature, amount of engine warm-up time, and other specifics.
5. Compare the engine sounds, if applicable, to a known good engine and make sure you are not trying to correct a normal condition.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Base Engine Misfire without Internal Engine Noises»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__base-engine-misfire-without-internal-engine)
2. «Base Engine Misfire with Abnormal Internal Lower Engine Noises»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__base-engine-misfire-with-abnormal-internal)
3. «Base Engine Misfire with Abnormal Valve Train Noise»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__base-engine-misfire-with-abnormal-valve)
4. «Base Engine Misfire with Coolant Consumption»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__base-engine-misfire-with-coolant-consumption)
5. «Base Engine Misfire with Excessive Oil Consumption»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__base-engine-misfire-with-excessive-oil)
6. «Engine Compression Test»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-compression-test)
7. «Engine Noise on Start-Up, but Only Lasting a Few Seconds»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-noise-on-start-up-but-only)
8. «Upper Engine Noise, Regardless of Engine Speed»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__upper-engine-noise-regardless-of-engine)
9. «Lower Engine Noise, Regardless of Engine Speed»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__lower-engine-noise-regardless-of-engine)
10. «Engine Noise Under Load»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-noise-under-load)
11. «Engine Will Not Crank - Crankshaft Will Not Rotate»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-will-not-crank-crankshaft)
12. «Coolant in Combustion Chamber»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__coolant-in-combustion-chamber)
13. «Coolant in Engine Oil»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__coolant-in-engine-oil)
14. «Oil Consumption Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-consumption-diagnosis)
15. «Oil Pressure Diagnosis and Testing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pressure-diagnosis-and-testing)
16. «Oil Leak Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-leak-diagnosis)
17. «Cylinder Leakage Test»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
18. «Drive Belt Chirping Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
19. «Drive Belt Squeal Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
20. «Drive Belt Whine Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
21. «Drive Belt Rumbling Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
22. «Drive Belt Vibration Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
23. «Drive Belt Falls Off Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
24. «Drive Belt Excessive Wear Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6)
25. «Drive Belt Tensioner Diagnosis»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__drive-belt-tensioner-diagnosis)

Base Engine Misfire without Internal Engine Noises

Base Engine Misfire without Internal Engine Noises

Base Engine Misfire with Abnormal Internal Lower Engine Noises

Base Engine Misfire with Abnormal Internal Lower Engine Noises

Base Engine Misfire with Abnormal Valve Train Noise

Base Engine Misfire with Abnormal Valve Train Noise

Base Engine Misfire with Coolant Consumption

Base Engine Misfire with Coolant Consumption

Base Engine Misfire with Excessive Oil Consumption

Base Engine Misfire with Excessive Oil Consumption

Engine Noise on Start-Up, but Only Lasting a Few Seconds

Engine Noise on Start-Up, but Only Lasting a Few Seconds

Upper Engine Noise, Regardless of Engine Speed

Upper Engine Noise, Regardless of Engine Speed

Lower Engine Noise, Regardless of Engine Speed

Lower Engine Noise, Regardless of Engine Speed

Engine Noise Under Load

Engine Noise Under Load

Engine Will Not Crank - Crankshaft Will Not Rotate

Engine Will Not Crank - Crankshaft Will Not Rotate

Coolant in Combustion Chamber

Coolant in Combustion Chamber

Coolant in Engine Oil

Coolant in Engine Oil

Engine Compression Test

1. Charge the battery if the battery is not fully charged.
2. Disable the ignition system.
3. Disable the fuel injection system.
4. Remove all the spark plugs.
5. Turn the ignition to the ON position.
6. Depress the accelerator pedal to position the throttle plate wide open.
7. Start with the compression gauge at zero and crank the engine through four compression strokes, 4 puffs.
8. Check the compression for each cylinder. Record the readings.
9. If a cylinder has low compression, inject approximately 15 ml (1 tablespoon) of engine oil into the combustion chamber through the spark plug hole. Recheck the compression and record the reading.
10. The minimum compression in any one cylinder should not be less than 70 percent of the highest cylinder. No cylinder should read less than 690 kPa (100 psi). For example, if the highest pressure in any one cylinder is 1 035 kPa (150 psi), the lowest allowable pressure for any other cylinder would be 725 kPa (105 psi). (1 035 x 70% = 725) (150 x 70% = 105). Normal - Compression builds up quickly and evenly to the specified compression for each cylinder. Piston Rings Leaking - Compression is low on the first stroke. Then compression builds up with the following strokes but does not reach normal. Compression improves considerably when you add oil. Valves Leaking - Compression is low on the first stroke. Compression usually does not build up on the following strokes. Compression does not improve much when you add oil. If 2 adjacent cylinders have lower than normal compression, and injecting oil into the cylinders does not increase the compression, the cause may be a head gasket leaking between the cylinders.

Engine Balancing

During the powertrain build process, balance weights may be added to the crankshaft balancer and/or flywheel as required.

In order to maintain engine/clutch assembly balance, it may be necessary to install or remove balance weights as detailed below

Crankshaft Balancer

1. Existing balancer onto existing engine: The balancer position must be marked prior to removal and installed to the original position. Refer to «Crankshaft Balancer Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-removal) .
2. New balancer onto an existing engine: Install the same size balance weights into the new balancer in the same location as the old component. Refer to «Crankshaft Balancer Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-cleaning-and-inspection) .

Engine Flywheel

1. Existing flywheel, clutch, and pressure plate onto the existing engine: Flywheel position must be marked prior to removal and installed to the original position. Refer to «Engine Flywheel Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-flywheel-removal) .
2. Existing flywheel, clutch, and pressure plate onto a new engine: Remove balance weights, if applicable from the flywheel.
3. New flywheel, clutch, and/or pressure plate onto an existing engine: Do not transfer or install balance weights.
4. New flywheel, clutch, and/or pressure plate onto a new engine: Do not install balance weights.

Tools Required

J 35667-A Cylinder Head Leakdown Tester or equivalent

Test Procedure

1. Disconnect the battery ground negative cable.
2. Remove the spark plugs.
3. Rotate the crankshaft to place the piston in the cylinder being tested at top dead center (TDC) of the compression stroke.
4. Install the J 35667-A or equivalent.
5. Apply shop air pressure to the J 35667-A and adjust according to the manufacturers instructions.
6. Record the cylinder leakage value. Cylinder leakage that exceeds 25 percent is considered excessive and may require component service. In excessive leakage situations, inspect for the following conditions: Air leakage noise at the throttle body or air inlet hose that may indicate a worn or burnt intake valve or a broken valve spring. Air leakage noise at the exhaust system tailpipe that may indicate a worn or burnt exhaust valve or a broken valve spring. Air leakage noise from the crankcase, oil level indicator tube, or oil fill tube that may indicate worn piston rings, a damaged piston, a worn or scored cylinder bore, a damaged engine block or a damaged cylinder head. Air bubbles in the cooling system may indicate a damaged cylinder head or a damaged cylinder head gasket.
7. Perform the leakage test on the remaining cylinders and record the values.

Oil Consumption Diagnosis

Oil Consumption Diagnosis

Oil Pressure Diagnosis and Testing

Tools Required

1. J 21867 Pressure Hose and Gage Assembly
2. J 42907 Oil Pressure Testing Tool

Scheme 90

1. With the vehicle on a level surface, run the vehicle for a few minutes, allow adequate drain down time of 2-3 minutes, and measure for a low oil level.
2. If required, add the recommended grade engine oil and fill the crankcase until the oil level measures full on the oil level indicator.
3. Run the engine briefly, approximately 10-15 seconds, and verify low or no oil pressure on the vehicle gauge or light.
4. Listen for a noisy valve train or a knocking noise.
5. Inspect for the following conditions: Oil diluted by water or glycol - anti freeze Foamy oil
6. Remove the oil filter and install the J 42907 .
7. Install J 21867 or equivalent to the J 42907 .
8. Run the engine and measure the engine oil pressure.
9. Compare the readings to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
10. If the engine oil pressure is below specifications, inspect the engine for one or more of the following conditions: Oil pump worn or dirty Refer to «Oil Pump Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pump-cleaning-and-inspection) . Oil pump-to-engine block bolts loose Refer to «Oil Pump, Pump Screen and Deflector Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Oil pump screen loose, plugged, or damaged Oil pump screen O-ring seal missing or damaged Malfunctioning oil pump pressure relief valve Excessive bearing clearance Cracked, porous, or restricted oil galleries Oil gallery plugs missing or incorrectly installed Refer to «Engine Block Plug Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Broken valve lifters Repair as necessary
11. If the reading on the J 21867 or equivalent is within specifications, inspect for the following conditions: Plugged or incorrect oil filter and/or malfunctioning oil bypass valve Malfunctioning vehicle oil pressure gage or sensor Repair as necessary.

Oil Leak Diagnosis

Oil Leak Diagnosis

Scheme 91

1. Test for vacuum at the positive crankcase ventilation (PCV) dirty air hose where it connects to the vacuum orifice tube in the engine valley cover. There should be a manifold vacuum present at the hose. If there is no vacuum, inspect for a plugged hose, leaking hose or a plugged intake manifold passage.
2. If oil has accumulated in the intake, inspect for the following conditions: Plugged vacuum orifice tube in the engine valley cover Plugged, restricted, or leaking PCV dirty air hose Plugged or restricted intake manifold passage Excessive crankcase pressure or blow-by

Scheme 92

Additional items to inspect

1. Plugged or restricted PCV fresh air hose
2. Inspect the valve rocker arm cover, the oil pan, engine front cover, and other sealing areas for leaks

Results of Incorrect Operation

A plugged crankcase ventilation system may contribute to the following conditions

1. A rough idle
2. Stalling or a slow idle speed
3. Oil leaks
4. Oil accumulation in the intake manifold
5. Sludge in the engine

A leaking hose may contribute to the following conditions

1. A rough idle
2. Stalling
3. Unstable idle speed

The crankcase ventilation system has no serviceable components so no maintenance of the system is required.

Diagnostic Aids

The chirping noise may be intermittent due to moisture on the drive belt(s) or the accessory drive pulley(s). in order to duplicate the customer's concern, It may be necessary to spray a small amount of water onto the drive belt(s). If spraying water on the drive belt(s) duplicates the symptom, cleaning the accessory drive pulley(s) may be the most probable solution.

A loose or improper installation of a body or suspension component, or other item(s) on the vehicle may cause the chirping noise.

Test Description

The number(s) below refer to the step(s) in the diagnostic table.

1. 2: The chirping noise may not be engine related. This step is to verify that the engine is making the noise. If the engine is not making the noise do not proceed further in this table.
2. 3: The noise may be an internal engine noise. Remove the drive belt(s) and operate the engine for a few seconds, this will verify if the chirping noise is related to the drive belt(s) or not. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also diagnostic trouble codes (DTCs) may set when the engine is operated with the drive belt(s) removed.
3. 4: Inspect the drive belt(s) for signs of pilling. Pilling is the small balls, pills, or strings in the drive belt grooves caused by the accumulation of rubber dust.
4. 6: Misalignment of the accessory drive pulley(s) may be caused from improper mounting or incorrect installation of an accessory drive component, or the pulley may be bent inward or outward from a previous repair. Test for a misaligned pulley using a straight edge in the pulley grooves across 2 or 3 pulleys. If a misaligned pulley is found refer to that accessory drive component for the proper removal and installation procedure for that pulley.
5. 10: Inspection of the fasteners can eliminate the possibility that a incorrect bolt, nut, spacer, or washer was installed.
6. 12: Inspection the accessory drive pulley(s) should include inspecting for bends, dents or other damage to the pulley(s) that would prevent the drive belt(s) from seating properly in the pulley grooves or on the smooth surface of a pulley when the back side of the drive belt is used to drive the pulley.
7. 14: Replacing the drive belt(s) when it is not damaged or there is not excessive pilling will only be a temporary repair.

Drive Belt Chirping Diagnosis

A loose or improper installation of a body, or suspension component, or other item(s) on the vehicle may cause the squeal noise.

If the noise is intermittent, verify that the accessory drive component(s) by varying their loads, making sure they are operating to their maximum capacity. An overcharged air conditioning (A/C) system, a power steering system restriction, or the incorrect fluid, or a failing generator are suggested items to inspect.

The number(s) below refer to the step(s) in the diagnostic table.

1. 2: The squeal may not be engine related. This step is to verify that the engine is making the noise. If the engine is not making the noise do not proceed further in this table.
2. 3: The noise may be an internal engine noise. Remove the drive belt(s) and operate the engine for a few seconds, this will verify if the squealing noise is related to the drive belt(s) or an accessory drive component. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also diagnostic trouble codes (DTCs) may set when the engine is operated with the drive belt(s) removed.
3. 4: This test is to verify that an accessory drive component(s) does not have a seized bearing. With the belt(s) removed, test the bearings in the accessory drive components for smooth operation. Also test the accessory drive component(s) with the engine operating by varying the load on the accessory drive component(s) to verify that the component(s) is operating properly.
4. 5: This test is to verify that the drive belt(s) tensioner(s) is operating properly. If the drive belt(s) tensioner(s) is not operating properly, proper belt tension may not be achieved to keep the drive belt from slipping which could cause a belt squeal noise.
5. 6: This test is to verify that the drive belt(s) is not too long, which would prevent the drive belt(s) tensioner(s) from operating properly. Also if the incorrect length drive belt(s) was installed, it may not be routed correctly and may be turning an accessory drive component in the incorrect direction.
6. 7: Misalignment of the accessory drive pulley(s) may be caused from improper mounting or incorrect installation of a accessory drive component, or the pulley is bent inward or outward from a previous repair. Test for a misaligned pulley using a straight edge in the pulley grooves across two or three pulleys. If a misaligned pulley is found, refer to that accessory drive component for the proper removal and installation procedure for that pulley.
7. 8: Inspect the accessory drive pulley(s) to verify that they are the correct diameter or width. Using a known good vehicle, compare the pulley sizes.

Drive Belt Squeal Diagnosis

The drive belt(s) will not cause the whine.

If the whine is intermittent, verify that it is not the accessory drive component(s) by varying their loads, making sure they are operating to their maximum capacity. An overcharged air conditioning (A/C) system, a power steering system restriction, or the incorrect fluid, or a failing generator are suggested items to inspect.

The number(s) below refer to the step(s) in the diagnostic table.

1. 3: This test is to verify that the whine is being caused by the accessory drive component(s). Remove the drive belt(s) and operate the engine for a few second, this will verify if the whining noise is related to the accessory drive component. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also diagnostic trouble codes (DTCs) may set when the engine is operated with the drive belt(s) removed.
2. 4: The inspection should include checking the drive belt tensioner and the drive belt idler pulley bearings. The drive belt(s) may have to be installed and the accessory drive components operated separately by varying their loads. Refer to the suspected accessory drive component for the proper removal and installation procedure.

Drive Belt Whine Diagnosis

Vibration from the engine operating may cause a body component or another part of the vehicle to produce a rumbling noise.

The drive belt(s) may have a condition that can not be seen or felt. Sometimes replacing the drive belt(s) may be the only repair for the symptom.

If after replacing the drive belt(s) and completing the diagnostic table, the noise is only heard with the drive belt(s) installed, there might be an accessory drive component failure. Varying the load on the accessory drive component(s) may aid in identifying which accessory drive component is causing the rumbling noise.

The number(s) below refer to the step(s) in the diagnostic table.

1. 2: This test is to verify that the symptom is present during diagnosing. Other vehicle components may cause a similar symptom.
2. 3: This test is to verify that the drive belt(s) is causing the rumbling. Rumbling may be confused with an internal engine noise due to the similarity in the description. Remove only one drive belt at a time if the vehicle has multiple drive belts. Operate the engine for a few seconds, this will verify if the rumbling noise is related to the drive belt(s) or not. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also diagnostic trouble codes (DTCs) may set when the engine is operated with the drive belt(s) removed.
3. 4: Inspect the drive belt(s) to ensure that the drive belt(s) is not the cause of the noise. Small cracks across the ribs of the drive belt(s) will not cause the noise. Belt separation is identified by the plys of the belt separating, this may be seen at the edge of the belt or felt as a lump in the belt.
4. 5: Small amounts of pilling is a normal condition and acceptable. When the pilling is severe the drive belt(s) does not have a smooth surface for proper operation.

Drive Belt Rumbling Diagnosis

The accessory drive components may have an affect on engine vibration. An overcharged air conditioning (A/C) system, a power steering system restriction, or the incorrect fluid, or an extra load placed on the generator are suggested items to inspect. To help identify an intermittent or an improper condition, vary the loads on the accessory drive components.

The number(s) below refer to the steps) in the diagnostic table.

1. 2: This test is to verify that the vibration is present during diagnosing. Other vehicle components may cause a similar symptom such as the exhaust system, or the drivetrain.
2. 3: This test is to verify that the drive belt(s) or accessory drive components may be causing the vibration. Remove the drive belt(s) and operate the engine for a few seconds, this will verify if the vibration is related to the drive belt(s) or not. With the drive belt(s) removed the water pump will not operate and the engine may overheat. Also diagnostic trouble codes (DTCs) may set when the engine is operated with the drive belt (s) removed.
3. 4: The drive belt(s) may cause a vibration. While the drive belt(s) is removed this is the best time to inspect the condition of the drive belt(s).
4. 6: Inspection of the fasteners can eliminate the possibility that a incorrect bolt, nut, spacer, or washer was installed.
5. 8: This step should only be performed if the fan is driven by the drive belt. Inspect the engine cooling fan for bent, twisted, loose, or cracked blades. Inspect the fan clutch for smooth operation. Inspect for a bent fan shaft or a bent mounting flange.
6. 9: Inspect the water pump drive shaft for being bent. Also inspect the water pump bearings for smooth operation and excessive play. Compare the water pump with a known, good water pump.
7. 10: Accessory drive component brackets that are bent, cracked, or loose may put an extra strain on that accessory component causing it to vibrate.

Drive Belt Vibration Diagnosis

If the drive belt(s) repeatedly falls off the accessory drive pulley(s), this may be caused by pulley misalignment.

An extra load that is quickly applied or released by an accessory drive component may also cause the drive belt(s) to fall off. Verify that the accessory drive component(s) are operate properly.

If the drive belt(s) is the incorrect length, the drive belt tensioner(s) may not maintain the proper tension on the drive belt(s).

The number(s) below refer to the step(s) in the diagnostic table.

1. 2: This inspection is to verify the condition of the drive belt(s). Damage may have occurred to the drive belt(s) when the drive belt(s) fell off the pulley. Inspect the drive belt(s) for cuts, tears, sections of ribs missing, or damaged belt plys.
2. 4: Misalignment of the accessory drive pulley(s) may be caused from improper mounting or incorrect installation of a accessory drive component, or the pulley may bent inward or outward from a previous repair. Test for a misaligned pulley using a straight edge in the pulley grooves across 2 or 3 pulleys. If a misaligned pulley is found, refer to that accessory drive component for the proper removal and installation procedure of that pulley.
3. 5: Inspection of the accessory drive pulley(s) should include inspecting for bends, dents or other damage that would prevent the drive belt from seating properly in the pulley grooves or on the smooth surface of a pulley when the back side of the drive belt(s) is used to drive the pulley.
4. 6: Accessory drive component brackets that are bent or cracked will also cause the drive belt(s) to fall off.
5. 7: Inspection of the fasteners can eliminate the possibility that a incorrect bolt, nut, spacer, or washer was installed. Missing, loose, or incorrect fasteners may cause pulley misalignment from the accessory drive bracket(s) moving under load. Over tightening the fasteners may cause misalignment of the accessory component bracket(s).

Drive Belt Falls Off Diagnosis

Excessive wear on a drive belt(s) is usually caused by incorrect installation or the wrong drive belt(s) for the application.

Minor misalignment of the drive belt pulleys will not cause excessive wear, but will probably cause the drive belt(s) to make a noise or to fall off the pulley(s).

Excessive misalignment of the drive belt pulleys will cause excessive wear and may also make the drive belt(s) fall off the pulley(s).

The number(s) below refer to the step number(s) on the diagnostic table.

1. 2: The inspection is to verify that the drive belt(s) is correctly installed over all of the drive belt pulleys. Wear on the drive belt(s) may be caused by mis-positioning the drive belt(s) by one groove on a pulley.
2. 3: The installation of a drive belt that is to wide or to narrow will cause wear on the drive belt(s). The drive belt ribs should match all of the grooves on the pulleys.
3. 4: This inspection is to verify the drive belt(s) is not contacting any parts of the engine or body while the engine is operating. There should be sufficient clearance when the drive belt accessory drive components load varies. The drive belt(s) should not come in contact with an engine or a body component when snapping the throttle.

Drive Belt Excessive Wear Diagnosis

Drive Belt Tensioner Diagnosis

Note. Allowing the drive belt tensioner to snap into the free position may result in damage to the tensioner.

1. Remove the drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Position a hex-head socket on the belt tensioner pulley bolt.
3. Move the belt tensioner through its full travel. The movement should feel smooth. There should be no binding. The belt tensioner should return freely.
4. If any binding is observed, replace the drive belt tensioner. Refer to «Drive Belt Tensioner Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Drive Belt Tensioner Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Install the drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

On-Vehicle Repair Instructions

See Special Tools and Equipment

Scheme 93

1. Remove the air outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
2. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
3. Rotate the drive belt tensioner (1) clockwise in order to relieve tension on the accessory drive belt.
4. Remove the accessory drive belt from the pulleys and tensioner.
5. Slowly release tension on the drive belt tensioner (1).
6. Remove the breaker bar and socket from the drive belt tensioner bolt.
7. Clean and inspect the drive belt surfaces of all the pulleys.

Installation Procedure

1. Route the accessory drive belt around all the pulleys except the water pump pulley (2) and tensioner (1).
2. Install a breaker bar with hex-head socket to the drive belt tensioner bolt.
3. Rotate the drive belt tensioner clockwise in order to relieve tension on the drive belt tensioner.
4. Install the accessory drive belt under the water pump pulley (2).
5. Install the accessory drive belt onto the drive belt tensioner.
6. Slowly release the tension.
7. Remove the breaker bar and socket from the drive belt tensioner bolt.
8. Install the air outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
9. Inspect the accessory drive belt for correct alignment.

Scheme 94

1. Remove the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the cooling fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
3. Install a breaker bar with hex-head socket to the air conditioning (A/C) drive belt tensioner bolt.
4. Rotate the A/C drive belt tensioner clockwise in order to relieve tension on the drive belt.
5. Remove the A/C drive belt from the pulleys.
6. Slowly release tension on the A/C drive belt tensioner.
7. Remove the breaker bar and socket from the A/C drive belt tensioner bolt.
8. Clean and inspect the drive belt surfaces of the pulleys.

1. Install the A/C drive belt around the crankshaft balancer.
2. Install a breaker bar with hex-head socket to the A/C drive belt tensioner bolt.
3. Rotate the A/C drive belt tensioner clockwise.
4. Install the A/C drive belt over the A/C compressor pulley and tensioner.
5. Slowly release tension on the A/C belt tensioner.
6. Remove the breaker bar and socket from the A/C drive belt tensioner bolt.
7. Inspect the A/C drive belt for correct alignment.
8. Install the cooling fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
9. Install the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Removal Procedure

1. Remove the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the accessory drive belt idler pulley bolt.
3. Remove the accessory drive belt idler pulley.

1. Install the accessory drive belt idler pulley and bolt. Tighten: Tighten the accessory drive belt idler pulley bolt to 50 N.m (37 lb ft).
2. Install the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Remove the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the accessory drive belt tensioner bolts.
3. Remove the accessory drive belt tensioner.

1. Install the accessory drive belt tensioner.
2. Install the accessory drive belt tensioner bolts. Tighten: Tighten the accessory drive belt tensioner bolts to 50 N.m (37 lb ft) starting with the lower bolt first.
3. Install the accessory drive belt. Refer to «Drive Belt Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 95

1. Remove the electric fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
2. Remove the air conditioning (A/C) drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Loosen the A/C drive belt tensioner bolt.
4. Remove the A/C drive belt tensioner.

1. Install the A/C drive belt tensioner.
2. Tighten the A/C drive belt tensioner bolt. Tighten: Tighten the A/C drive belt tensioner bolt to 50 N.m (37 lb ft).
3. Install the A/C drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Install the electric fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

Engine Mount Inspection

1. Install the engine support fixture. Refer to «Engine Support Fixture»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l__engine-support-fixture) . Raising the engine removes the weight from the engine mount and creates slight tension in the rubber.
2. Observe the engine mount while raising the engine. Replace the engine mount if the engine mount exhibits any of the following conditions: The hard rubber surface is covered with heat check cracks. The rubber is separated from the metal plate of the engine mount. The rubber is split through the center of the engine mount. The GLYCOL™ fluid is leaking from the engine mount.
3. If there is movement between the metal plate of the engine mount and its attaching points, lower the engine on the engine mount. Tighten the bolts or nuts attaching the engine mount to the frame or engine mount bracket. Refer to «Engine Mount Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) or «Engine Mount Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-32l) .

1. J 28467-501 J 28467-501A Side Rail Support Adapters. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 28467-518 Main Support Beam
3. J 28467-B Universal Engine Support Fixture. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. J 41798 Engine Lift Brackets. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. J 41803 Engine Support Fixture Adapters. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 96

Scheme 97

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Install an engine support hook from the J 41803 to the front of the right cylinder head in the location shown. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Follow the tool instructions for the proper bolt size and torque.
3. Remove the coil assembly from the left cylinder head. Refer to «Ignition Coil(s) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
4. Install the remaining engine support hook from the J 41803 to the left cylinder head in the location shown. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Place washers between the hook and the cylinder head to allow for clearance to the rocker cover. Ensure that the bolt used is long enough to allow for proper thread engagement.
5. Assemble the J 28467-501 (1) to each end of the J 28467-518 (2) main support beam.
6. Place the rail support and beam support assembly on top of both the left and right fender lips, over the left cylinder head support hook.
7. Install the round tube of the front support assembly J 28467-4A through the large hole in the radiator shelf tube J 28467-2A.
8. Remove the upper tie bar cover.
9. Locate the J 28467-4A front support assembly to the upper tie bar.
10. Install the J 28467-9 7/16 inch x 2.0 inch quick-release pin through the top hole in the J 28467-4A front support assembly.
11. Attach the radiator shelf tube (2) to the bottom of the main support beam (1) using the J 28467-1A cross bracket assembly. Ensure that the radiator shelf tube is inline with the right engine support hook.
12. Install the lift hook assembly J 28467-7A (3) to the radiator shelf tube (2). Install the lift hook to the right cylinder head support hook.
13. Install the lift hook assembly J 28467-7A (4) to the main support beam (1) over the left cylinder head support hook. Install the lift hook to the left cylinder head support hook.
14. Hand tighten the lift hook (3, 4) wing nuts in order to remove all slack from the engine support fixture.
15. The engine is now supported in the vehicle to perform repairs that require front frame removal.
16. The J 41798 are used to lift the engine once the engine is removed from the vehicle.
17. Remove the right bank coil assembly. Refer to «Ignition Coil(s) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
18. Remove the 2 right rear cylinder spark plug wires.
19. Remove the negative battery cable from the right rear cylinder head. Refer to «Battery Negative Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
20. Install the J 41798-1 engine lift bracket to the right cylinder head following the directions found on the tool.
21. Remove the left bank coil assembly. Refer to «Ignition Coil(s) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
22. Remove the 2 front left cylinder spark plug wires.
23. Install the J 41798-2 engine lift bracket to the left cylinder head following the directions found on the tool.

1. Unscrew the lift hooks (3, 4) and remove them from the support hooks. Remove the lift hooks from the tube assemblies (1, 2).
2. Remove the front tube and support assembly (2, 5) from the main support beam (1).
3. Remove the main support beam assembly.
4. Remove the support hooks from the cylinder heads.
5. Install the coil assembly to the left cylinder head. Refer to «Ignition Coil(s) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
6. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Install a screw jack with a block of wood under the oil pan for support.
3. Remove the engine mount bracket to engine retaining bolts.
4. Remove the engine mount bracket to frame retaining bolts.
5. Remove lower engine mount bracket retaining nuts.
6. Remove the left engine mount bracket to the frame stud.
7. Remove the left engine mount bracket assembly from the vehicle.
8. Remove the engine mount from the engine mount brackets. Refer to «Engine Mount Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Install the engine mount to the engine mount brackets. Refer to «Engine Mount Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Install the left engine mount bracket assembly to the vehicle.
3. Install the left engine mount bracket to engine retaining bolts. Tighten: Tighten the bolts to 60 N.m (44 lb ft).
4. Install the left engine mount bracket to the frame stud. Tighten: Tighten the stud to 25 N.m (19 lb ft).
5. Install the lower engine mount bracket retaining bolts. Tighten: Tighten the nut to 80 N.m (59 lb ft).
6. Install the lower engine mount bracket retaining nut. Tighten: Tighten the nut to 80 N.m (59 lb ft).
7. Remove the screw jack.
8. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the starter. Refer to «Starter Motor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Install a screw jack with a block of wood under the oil pan for support.
4. Remove the engine mount bracket to engine retaining bolts.
5. Remove the engine mount bracket to frame retaining bolts.
6. Remove lower engine mount bracket retaining nuts.
7. Remove the right engine mount bracket to the frame stud.
8. Remove the engine mount bracket assembly from the vehicle.
9. Remove the engine mount from the engine mount brackets. Refer to «Engine Mount Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Install the engine mount to the engine mount brackets. Refer to «Engine Mount Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Install the left engine mount bracket assembly to the vehicle.
3. Install the engine mount bracket to engine retaining bolts. Tighten: Tighten the bolts to 60 N.m (44 lb ft).
4. Install the engine mount bracket to the frame stud. Tighten: Tighten the stud to 25 N.m (19 lb ft).
5. Install the lower engine mount bracket retaining bolts. Tighten: Tighten the bolt to 80 N.m (59 lb ft).
6. Install the lower engine mount bracket retaining nuts. Tighten: Tighten the nuts to 80 N.m (59 lb ft).
7. Remove the screw jack.
8. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the left engine mount bracket assembly from the vehicle. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the engine mount retaining nuts.
4. Remove the engine mount from the engine mount brackets.

1. Install the engine mount to the engine mount brackets.
2. Install the engine mount retaining nuts. Tighten: Tighten the nut to 80 N.m (59 lb ft).
3. Install the left engine mount bracket assembly to the vehicle. Refer to «Engine Mount Bracket Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the right engine mount bracket assembly from the vehicle. Refer to «Engine Mount Bracket Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the engine mount to engine mount brackets retaining nuts.
4. Remove the engine mount from the engine mount brackets.

1. Install the engine mount to the engine mount brackets.
2. Install the engine mount retaining nuts. Tighten: Tighten the nut to 80 N.m (59 lb ft).
3. Install the right engine mount bracket assembly to the vehicle. Refer to «Engine Mount Bracket Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Lower the vehicle.

Scheme 98

1. Remove the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
2. Lift the sight shield straight up from the engine.
3. Disengage the sight shield retaining features from the fuel rail.
4. Remove the sight shield from the engine compartment.

1. Align the sight shield retaining features to the fuel injector rails.
2. Push the sight shield down ensuring that the retaining features engage with the fuel rail.
3. Install the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the positive crankcase ventilation (PCV) tube from the right rocker arm cover.
3. Remove the PCV tube from the throttle body.
4. Remove the PCV hose from the valley cover.
5. Remove the PCV hose from the intake manifold.

1. Install the PCV hose to the intake manifold.
2. Install the PCV valve hose to the valley cover.
3. Install the PCV tube to the throttle body.
4. Install the PCV tube to the right rocker arm cover.
5. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 99

Scheme 100

1. Drain the cooling system. Refer to «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
2. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
3. If replacing the intake manifold, perform the following: Remove the throttle body. Refer to «Throttle Body Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L. Remove the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
4. Disconnect the fuel feed hose (2). Refer to «Fuel Hose/Pipes Replacement - Engine Compartment»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
5. Disconnect the evaporative emission (EVAP) canister purge tube from the intake manifold.
6. Disconnect the EVAP canister purge tube from the EVAP canister purge solenoid valve.
7. Remove the EVAP canister purge tube.
8. Disconnect the EVAP canister purge tube (4) from the EVAP canister purge solenoid valve.
9. Disconnect the EVAP canister purge tube from the fuel feed pipe.
10. Disconnect the EVAP canister purge tube from the rear of the right cylinder head (1).
11. Remove the EVAP canister purge tube from under the fuel rail and remove the tube from the vehicle.
12. Disconnect the throttle position (TP) sensor electrical connector.
13. Remove the coolant air bleed hose. Refer to «Coolant Air Bleed Hose Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
14. Disconnect the throttle body outlet hose (1) from the throttle body.
15. Position the throttle body outlet hose aside.
16. Disconnect all the fuel injector electrical connectors (1).
17. Disconnect the EVAP canister purge solenoid valve electrical connector (2).
18. Disconnect the electronic throttle control (ETC) electrical connector (3).
19. Remove the EVAP canister purge solenoid valve from the bracket.
20. Disconnect the harness clips from the fuel rails.
21. Reposition the intake manifold branches of the wiring harness.
22. Disconnect the power brake booster vacuum hose at the booster.
23. Remove the knock sensor wire harness (1) clip from the fuel rail stop bracket (2).
24. Remove the TP sensor harness clip from the positive crankcase ventilation (PCV) tube.
25. Remove the PCV tube from the right rocker arm cover and the throttle body.
26. Remove the PCV hose from the valley cover and intake manifold.
27. Remove the intake manifold bolts (1) and fuel rail stop bracket (2).
28. Position the intake manifold forward.
29. Disconnect the manifold absolute pressure (MAP) sensor vacuum hose.
30. Disconnect the MAP sensor electrical connector.
31. Remove the intake manifold.
32. Remove and discard the intake manifold gaskets (1).
33. Clean and inspect the intake manifold. Refer to «Intake Manifold Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Install NEW intake manifold gaskets (1) to the intake manifold.
2. Install intake manifold.
3. Position the intake manifold forward.
4. Connect the MAP sensor vacuum hose.
5. Connect the MAP sensor electrical connector.
6. Position the intake manifold into place.
7. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the intake manifold bolts (1).
8. Install the fuel rail stop bracket (2).
9. Install the intake manifold bolts (1).
10. Tighten the intake manifold bolts. Tighten: Tighten the intake manifold bolts a first pass in sequence to 5 N.m (44 lb in). Tighten the intake manifold bolts a second pass in sequence to 10 N.m (89 lb in).
11. Install the PCV hose to the valley cover and intake manifold.
12. Install the PCV tube to the right rocker arm cover and the throttle body.
13. Install the TP sensor harness clip to the PCV tube.
14. Install the knock sensor wire harness (1) clip to the fuel rail stop bracket (2).
15. Connect the power brake booster vacuum hose to the booster.
16. Connect the harness clips to the fuel rails.
17. Install the EVAP canister purge solenoid valve to the bracket.
18. Connect the ETC electrical connector (3).
19. Connect the EVAP canister purge solenoid valve electrical connector (2).
20. Connect the fuel injector electrical connectors (1).
21. Connect the throttle body outlet hose (1) to the throttle body.
22. Install the coolant air bleed hose. Refer to «Coolant Air Bleed Hose Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
23. Connect the TP sensor electrical connector.
24. Install the EVAP canister purge tube under the fuel rail.
25. Connect the EVAP canister purge tube at the rear of the right cylinder head (1).
26. Connect the EVAP canister purge tube to the fuel feed pipe.
27. Connect the EVAP canister purge tube (4) to the EVAP canister purge solenoid valve.
28. If previously removed, install the fuel injectors. Refer to «Fuel Injector Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
29. Connect the fuel feed hose. Refer to «Fuel Hose/Pipes Replacement - Engine Compartment»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
30. If previously removed, install the throttle body. Refer to «Throttle Body Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
31. Fill the cooling system. Refer to «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.

Scheme 101

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Gently pry up the rubber grommets.
3. Disconnect the knock sensor wire harness electrical connectors.
4. Remove the knock sensors.
5. Remove the engine valley cover bolts.
6. Remove the engine valley cover and gasket.
7. Discard the engine valley cover gasket.
8. Remove the knock sensor oil seals (1) from the cover (2).
9. Clean and inspect the engine valley cover. Refer to «Engine Valley Cover Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-valley-cover-cleaning-and-inspection) .

Scheme 102

1. Install NEW knock sensor oil seals (1) into the valley cover (2). Lubricate the seal surfaces with clean engine oil.
2. Install the engine valley cover and a NEW gasket.
3. Install the engine valley cover bolts. Tighten: Tighten the engine valley cover bolts to 25 N.m (18 lb ft).
4. Install the knock sensors. Tighten: Tighten the knock sensors to 20 N.m (15 lb ft).
5. Connect the knock sensor wire harness electrical connectors.
6. Install the rubber grommets into the valley cover.
7. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Disconnect the spark plug wires from the ignition coils. Twist the spark plug wire boot 1/2 turn. Pull only on the boot in order to remove the wire from the ignition coil.
4. Disconnect the ignition coil wire harness main electrical connector.
5. Disconnect the evaporative emission (EVAP) canister purge tube from the intake manifold.
6. Disconnect the EVAP canister purge tube from the EVAP canister purge solenoid valve.
7. Remove the EVAP canister purge tube.
8. Disconnect the EVAP canister purge tube from the EVAP canister purge solenoid valve.
9. Disconnect the EVAP canister purge tube from the fuel feed pipe.
10. Remove the EVAP canister purge tube.
11. Disconnect the EVAP canister purge tube from the connector at the rear of the right head (1).
12. Disconnect the EVAP canister purge solenoid valve electrical connector (2).
13. Remove the EVAP canister purge solenoid valve from the bracket.
14. Remove the ignition coil bracket studs.
15. Remove the ignition coil bracket.
16. Loosen the valve rocker arm cover bolts.
17. Remove the valve rocker cover.
18. Remove the gasket (1) from the rocker cover. Discard the OLD gasket.
19. Clean and inspect the rocker arm cover. Refer to «Valve Rocker Arm Cover Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__valve-rocker-arm-cover-cleaning-and) .

1. Install a NEW rocker cover gasket (1) into the valve rocker cover lip.
2. Install the valve rocker arm cover.
3. Tighten the valve rocker cover bolts. Tighten: Tighten the valve rocker arm cover bolts to 12 N.m (106 lb in).
4. Install the ignition coil bracket.
5. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the ignition coil bracket studs.
6. Install the ignition coil bracket studs. Tighten: Tighten the ignition coil bracket studs to 12 N.m (106 lb in).
7. Install the EVAP canister purge solenoid valve to the bracket.
8. Connect the EVAP canister purge solenoid valve electrical connector (2).
9. Connect the EVAP canister purge tube to the EVAP canister purge solenoid valve.
10. Connect the EVAP canister purge tube to the connection at the rear of the right head (1).
11. Connect the EVAP canister purge tube to the fuel feed pipe.
12. Connect the EVAP canister purge tube to the intake manifold.
13. Connect the EVAP canister purge tube to the EVAP canister purge solenoid valve.
14. Connect the ignition coil wire harness main electrical connector.
15. Install the spark plug wires to the ignition coils.
16. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
17. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the positive crankcase ventilation (PCV) tube from the throttle body and rocker arm cover.
3. Disconnect the spark plug wires from the ignition coils. Twist the spark plug wire boot 1/2 turn. Pull only on the boot in order to remove the wire from the ignition coil.
4. Disconnect the ignition coil wire harness main electrical connector.
5. Remove the ignition coil bracket studs.
6. Remove the ignition coil bracket.
7. Loosen the valve rocker arm cover bolts.
8. Remove the valve rocker arm cover.
9. Remove the gasket (1) from the rocker cover. Discard the OLD gasket.
10. Remove the oil fill cap from the oil fill tube.
11. DO NOT remove the oil fill tube, unless replacement is necessary due to signs of leakage.
12. Clean and inspect the valve rocker arm cover. Refer to «Valve Rocker Arm Cover Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__valve-rocker-arm-cover-cleaning-and) .

Scheme 103

1. Lubricate the O-ring seal of the NEW oil fill tube with clean engine oil, if removed.
2. Insert the NEW oil fill tube into the rocker arm cover, if necessary. Rotate the tube clockwise until locked in the proper position.
3. Install the oil fill cap into the tube. Rotate the cap clockwise until locked in the proper position.
4. Install a NEW gasket (1) into the valve rocker cover lip.
5. Install the valve rocker arm cover onto the cylinder head.
6. Tighten the rocker arm cover bolts. Tighten: Tighten the valve rocker arm cover bolts to 12 N.m (106 lb in).
7. Install the ignition coil bracket.
8. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the bracket studs.
9. Install the ignition coil bracket studs. Tighten: Tighten the ignition coil bracket studs to 12 N.m (106 lb in).
10. Connect the ignition coil wire harness main electrical connector.
11. Install the spark plug wires to the ignition coils.
12. Install the PCV tube to the throttle body and rocker arm cover.
13. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 104

1. Remove the valve rocker arm covers. Refer to «Valve Rocker Arm Cover Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Valve Rocker Arm Cover Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . IMPORTANT: Place the valve rocker arms, valve pushrods, and pivot support, in a rack so that they can be installed in the same location from which they were removed.
2. Remove the valve rocker arm bolts.
3. Remove the valve rocker arms.
4. Remove the valve rocker arm pivot support.
5. Remove the pushrods.
6. Clean and inspect the valve rocker arms and pushrods. Refer to «Valve Rocker Arm and Push Rods Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Valve lash is net build, no valve adjustment is required.

Scheme 105

1. Lubricate the valve rocker arms and pushrods with clean engine oil.
2. Lubricate the flange of the valve rocker arm bolts with clean engine oil. Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
3. Install the valve rocker arm pivot support.
4. Install the pushrods.
5. Install the rocker arms and bolts. DO NOT tighten the rocker arm bolts at this time.
6. Rotate the crankshaft until the number one piston is at top dead center (TDC) of the compression stroke. In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. The engine firing order is 1,8,7,2,6,5,4,3. Cylinders 1,3,5, and 7 are left bank. Cylinders 2,4,6, and 8 are right bank.
7. With the engine in the number one firing position, tighten the following valve rocker arm bolts: Tighten: Tighten the exhaust valve rocker arm bolts 1,2,7, and 8 to 30 N.m (22 lb ft). Tighten the intake valve rocker arm bolts 1,3,4, and 5 to 30 N.m (22 lb ft).
8. Rotate the crankshaft 360 degrees.
9. Tighten the following valve rocker arm bolts: Tighten: Tighten the exhaust valve rocker arm bolts 3,4,5, and 6 to 30 N.m (22 lb ft). Tighten the intake valve rocker arm bolts 2,6,7, and 8 to 30 N.m (22 lb ft).
10. Install the valve rocker arm covers. Refer to «Valve Rocker Arm Cover Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Valve Rocker Arm Cover Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Valve Stem Oil Seal and Valve Spring Replacement

Tools Required

1. J 22794 Spark Plug Port Adapter. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 38606 Valve Spring Compressor (Head-on)

Scheme 106

1. Remove the valve rocker arms. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the spark plug wire from the spark plug for the cylinder to be serviced. Twist the plug wire 1/2 turn. Pull only on the boot in order to remove the wire from the spark plug.
3. Loosen the spark plug 1 or 2 turns.
4. Brush or use compressed air to remove any dirt or debris around the spark plug.
5. Remove the spark plug.
6. Install the J 22794 into the spark plug hole. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
7. Attach an air hose to J 22794 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
8. Tap the end of the valve stem with a plastic face hammer in order to loosen any varnish on the valve stem keys.
9. Use the J 38606 in order to compress the valve spring.
10. Remove the valve stem keys (5).
11. Carefully release the valve spring tension.
12. Remove the J 38606 .
13. Remove the valve spring cap (4).
14. Remove the valve spring (3).
15. Remove the valve stem oil seal and shim (2).

Scheme 107

1. Clean the cylinder head valve spring seat area.
2. Install the valve stem oil seal and shim (2), tapping it into position using an appropriate size socket and hammer. Install the oil seal and shim until it bottoms on the head.
3. Install the valve spring to the J 38606 .
4. Compress the valve spring using the J 38606 .
5. Install the valve spring to the cylinder head.
6. Install the valve spring cap (4).
7. Install the valve stem keys (5). Use grease to hold the keys (5) in place and remove J 38606 . Make sure the keys (5) seat properly in the groove of the valve stem. Carefully release the valve spring pressure, making sure the valve keys stay in place. Remove the J 38606 . Tap the end to the valve stem with a plastic faced hammer to seat the keys, if necessary.
8. Disconnect and remove the air supply from the J 22794 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Remove the J 22794 from the spark plug hole. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
10. Install the spark plug by hand until snug.
11. Tighten the spark plug. Tighten: Tighten the spark plugs to 15 N.m (11 lb ft).
12. Install the spark plug wire to the spark plug.
13. Install the valve rocker arms. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 108

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the oil level indicator.
3. Remove the oil level indicator tube bolt.
4. Remove the oil level indicator tube.
5. Remove the O-ring from the oil level indicator tube, if required.

Scheme 109

1. Lubricate the O-ring seal with clean engine oil.
2. Install the oil level indicator tube into position.
3. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Insert the oil level indicator tube into the engine block until the collar is flush with the block.
5. Lower the vehicle.
6. Install the oil level indicator tube bolt. Tighten: Tighten the oil level indicator tube bolt to 25 N.m (18 lb ft).
7. Install the oil level indicator.
8. Check the oil level and add if necessary.
9. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 110

1. Remove the valve rocker arms and pushrods. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the engine coolant air bleed pipe. Refer to «Coolant Air Bleed Pipe Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
4. Remove the power steering pump and bracket. Refer to «Power Steering Pump Replacement (5.7L)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
5. Remove the exhaust manifold. Refer to «Exhaust Manifold Replacement - Left (LS6)»(/cadillac/cts/i-2002-2007/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
6. Remove the engine wiring harness ground bolt from the rear of the left cylinder head.
7. Reposition the engine wire harness ground strap away from the cylinder head.
8. Remove the cylinder head bolts.
9. Remove the cylinder head. Refer to «Cylinder Head Removal - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-removal-left) .
10. Remove the cylinder head gasket.
11. Discard the gasket.
12. Discard the cylinder head bolts.
13. Clean and inspect the cylinder head. Refer to «Cylinder Head Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-cleaning-and-inspection) .

1. Install the cylinder head. Refer to «Cylinder Head Installation - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-installation-left) .
2. Position the engine wire harness ground strap to the cylinder head.
3. Install the engine wiring harness ground bolt to the rear of the left cylinder head. Tighten: Tighten the engine wire harness ground bolt to 32 N.m (24 lb ft).
4. Install the exhaust manifold. Refer to «Exhaust Manifold Replacement - Left (LS6)»(/cadillac/cts/i-2002-2007/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
5. Install the power steering pump and bracket. Refer to «Power Steering Pump Replacement (5.7L)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
6. Install the engine coolant air bleed pipe. Refer to «Coolant Air Bleed Pipe Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
7. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
8. Install the valve rocker arms and pushrods. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Remove the valve rocker arms and pushrods. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the engine coolant air bleed pipe and covers. Refer to «Coolant Air Bleed Pipe Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
4. Remove the exhaust manifold. Refer to «Exhaust Manifold Replacement - Right (LS6)»(/cadillac/cts/i-2002-2007/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
5. Remove the oil level indicator tube. Refer to «Oil Level Indicator and Tube Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Remove the negative battery cable from the right cylinder head. Refer to «Battery Negative Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) «Battery Negative Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
7. Remove the cylinder head bolts.
8. Remove the cylinder head. Refer to «Cylinder Head Removal - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-removal-right) .
9. Remove the cylinder head gasket.
10. Discard the gasket.
11. Discard the cylinder head bolts.
12. Clean and inspect the cylinder head. Refer to «Cylinder Head Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-cleaning-and-inspection) .

Scheme 111

1. Install the right cylinder head. Refer to «Cylinder Head Installation - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-installation-right) .
2. Install the negative battery cable to the right cylinder head. Refer to «Battery Negative Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Install the oil level indicator tube. Refer to «Oil Level Indicator and Tube Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Install the exhaust manifold. Refer to «Exhaust Manifold Replacement - Right (LS6)»(/cadillac/cts/i-2002-2007/remont/exhaust/#engine-exhaust-system) in Engine Exhaust.
5. Install the engine coolant air bleed pipe. Refer to «Coolant Air Bleed Pipe Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
6. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
7. Install the valve rocker arms and pushrods. Refer to «Valve Rocker Arm and Push Rod Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

J 3049-A Valve Lifter Remover. See Special Tools and Equipment .

1. Remove the cylinder head. Refer to «Cylinder Head Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Cylinder Head Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the valve lifter guide bolts (1).
3. Remove the valve lifters and guide.
4. Use the J 3049-A or equivalent in order to remove the valve lifters (if required). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Remove the valve lifters from the guide.
6. Organize or mark the components so that they can be installed in the same location from which they were removed.
7. Clean and inspect the valve lifters and guides. Refer to «Valve Lifters and Guides Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 112

1. Lubricate the valve lifters and engine block valve lifter bores with clean engine oil.
2. Insert the valve lifters into the lifter guides. Align the flat area on the top of the lifter with the flat area in the guide bore. Push the lifter completely into the guide bore.
3. Install the valve lifters and guide to the engine block.
4. Install the valve lifter guide bolt (1). Tighten: Tighten the valve lifter guide bolt to 12 N.m (106 lb in).
5. Install the cylinder head. Refer to «Cylinder Head Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) or «Cylinder Head Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Remove the radiator assembly. Refer to «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
3. Remove the air conditioner condenser. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning.
4. Remove the air conditioning (A/C) drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
6. Remove the starter motor to gain access to the engine flywheel. Refer to «Starter Motor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
7. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-removal) .
8. Clean and inspect the crankshaft balancer. Refer to «Crankshaft Balancer Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-cleaning-and-inspection) .

Note. Refer to Fastener Notice in Cautions and Notices.

1. Install the crankshaft balancer. Refer to «Crankshaft Balancer Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-installation) .
2. Install the starter motor. Refer to «Starter Motor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
3. Install the A/C drive belt. Refer to «Drive Belt Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Install the A/C condenser. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning.
5. Install the radiator assembly. Refer to «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
6. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.

J 41478 Crankshaft Front Oil Seal Installer. See Special Tools and Equipment .

1. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Gently pry the crankshaft oil seal (1) from the front cover.

1. Lubricate the outer edge of the oil seal (1) with clean engine oil.
2. Lubricate the front cover oil seal bore with clean engine oil.
3. Install the crankshaft front oil seal onto the J 41478 guide.
4. Install the J 41478 threaded rod (with nut, washer, guide, and oil seal) into the end of the crankshaft.
5. Use the J 41478 in order to install the oil seal into the cover bore. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Use a wrench and hold the hex on the installer tool. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore. Remove the tool. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.
6. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Engine Front Cover Replacement

Tools Required

1. J 41476 Front and Rear Cover Alignment (Crankshaft Oil Seal Area). See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 41478 Crankshaft Front Oil Seal Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 113

1. Remove the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the water pump. Refer to «Water Pump Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
3. Remove the air conditioning belt tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Remove the accessory drive belt idler pulley. Refer to «Drive Belt Idler Pulley Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Remove the generator bracket. Refer to «Generator Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
6. Remove the oil pan-to-front cover bolts (1).
7. Remove the front cover bolts.
8. Remove the front cover and gasket.
9. Discard the front cover gasket.
10. Clean and inspect the engine front cover. Refer to «Engine Front Cover Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-front-cover-cleaning-and-inspection) .

Scheme 114

1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the oil pan to engine block junction.
2. Install the front cover gasket and cover.
3. Install the front cover bolts until snug. Do not overtighten.
4. Install the oil pan-to-front cover bolts (1) until snug. Do not overtighten.
5. Install the J 41476 to the front cover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Align the tapered legs of the J 41476 with the machined alignment surfaces on the front cover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . NOTE: Refer to «Fastener Notice»(/cadillac/cts/i-2002-2007/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices.
7. Install the crankshaft balancer bolt until sung. Do not overtighten. Tighten: Tighten the oil pan-to-front cover bolts to 25 N.m (18 lb ft). Tighten the engine front cover bolts to 25 N.m (18 lb ft).
8. Remove the J 41476 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Lubricate the outer edge of the oil seal (1) with clean engine oil.
10. Lubricate the front cover oil seal bore with clean engine oil.
11. Install the crankshaft front oil seal into the J 41478 guide. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
12. Install the J 41478 threaded rod (with nut, washer, guide, and oil seal) into the end of the crankshaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
13. Use the J 41478 in order to install the oil seal into the cover bore. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Use a wrench and hold the hex on the installer bolt. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore. Remove the tool. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.
14. Install the generator bracket. Refer to «Generator Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
15. Install the accessory drive belt idler pulley. Refer to «Drive Belt Idler Pulley Replacement - Accessory»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
16. Install the air conditioning belt tensioner. Refer to «Drive Belt Tensioner Replacement - Air Conditioning»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
17. Install the water pump. Refer to «Water Pump Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
18. Install the crankshaft balancer. Refer to «Crankshaft Balancer Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

J 41479 Crankshaft Rear Oil Seal Installer. See Special Tools and Equipment .

1. Remove the engine flywheel. Refer to «Engine Flywheel Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Gently pry the crankshaft rear oil seal (1) from the rear cover.

Scheme 115

1. Lubricate the outside diameter (OD) of the oil seal (1) with clean engine oil. DO NOT allow oil or other lubricants to contact the seal surface.
2. Lubricate the rear cover oil seal bore with clean engine oil. DO NOT allow oil or other lubricants to contact the crankshaft surface.
3. Install the J 41479 cone (2) and bolts onto the rear of the crankshaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Tighten the bolts until snug. Do not overtighten.
5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear cover bore.
6. Thread the J 41479 threaded rod into the tapered cone until the tool (1) contacts the oil seal. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
7. Align the oil seal onto the tool (1).
8. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
9. Remove the J 41479 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
10. Install the engine flywheel. Refer to «Engine Flywheel Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 116

1. Remove the transmission clutch assembly. Refer to «Clutch Assembly Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Assembly Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.
2. Remove the engine flywheel. Refer to «Engine Flywheel Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-flywheel-removal) .
3. Remove the oil pan-to-rear cover bolts.
4. Remove the rear cover bolts.
5. Remove the rear cover and gasket. Refer to «Engine Rear Cover Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-rear-cover-removal) .
6. Discard the rear cover gasket.
7. Clean and inspect the engine rear cover. Refer to «Engine Rear Cover Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-rear-cover-cleaning-and-inspection) .

Scheme 117

1. Install the rear cover and gasket. Refer to «Engine Rear Cover Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-rear-cover-installation) .
2. Install the engine flywheel. Refer to «Engine Flywheel Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-flywheel-installation) .
3. Install the transmission clutch assembly. Refer to «Clutch Assembly Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Assembly Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.

Scheme 118

1. Drain the engine oil.
2. Remove the oil filter.
3. Remove the oil filter adapter fitting (1).

1. Install the oil filter adapter fitting (1). Tighten: Tighten the oil filter adapter fitting to 55 N.m (40 lb ft).
2. Install the oil filter. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
3. Refill the engine oil.

1. Drain the engine oil.
2. Remove the oil filter.
3. Remove the oil filter adapter (1).
4. Remove the oil filter bypass valve (2).

1. Install the oil filter bypass valve (2).
2. Install the oil filter adapter (1). Tighten: Tighten the oil filter adapter to 55 N.m (40 lb ft).
3. Install the oil filter. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
4. Refill the engine oil.

1. Drain the engine oil.
2. Remove the oil filter.
3. Remove the oil pan cover bolts, cover, and gasket.
4. Discard the gasket.

1. Install a new gasket, the cover, and bolts. Tighten: Tighten the oil pan cover bolts to 12 N.m (106 lb in).
2. Install the oil filter. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
3. Refill the engine oil.

Scheme 119

1. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
2. Install the engine support fixture (1-5). Refer to «Engine Support Fixture»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Drain the engine oil. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Re-install the engine oil drain plug until snug.
6. Remove the left closeout cover and bolt.
7. Remove the starter motor. Refer to «Starter Motor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
8. Remove the right transmission closeout cover and bolt.
9. Remove and drain the engine oil filter.
10. Re-install the engine oil filter until snug.
11. Remove the bottom two transmission housing-to-oil pan bolts.
12. Disconnect the engine oil temperature sensor (3) electrical connector.
13. Remove the front frame assembly (1). Refer to «Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/frames-subframes-crossmembers/#frame-and-underbody) in Frame and Underbody.
14. Remove the power steering and air conditioning line retainers from the front of the oil pan and position aside.
15. Reposition the power steering rack in order to gain access to the oil pan bolts and to provide clearance while removing the oil pan.
16. Remove the oil level sensor from the oil pan. Refer to «Engine Oil Level Sensor and/or Switch Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
17. Remove the oil pan bolts.
18. Remove the oil pan and gasket. Refer to «Oil Pan Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pan-removal) .
19. Clean and inspect the oil pan. Refer to «Oil Pan Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pan-cleaning-and-inspection) .

1. Install the oil pan and gasket. Refer to «Oil Pan Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pan-installation) .
2. Install the oil level sensor. Refer to «Engine Oil Level Sensor and/or Switch Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Install the power steering and air conditioning line retainers to the front of the oil pan.
4. Install the front frame assembly (1). Refer to «Frame Replacement - Front»(/cadillac/cts/i-2002-2007/remont/frames-subframes-crossmembers/#frame-and-underbody) in Frame and Underbody.
5. Connect the engine oil temperature sensor (3) electrical connector.
6. Install the transmission housing-to-oil pan bolts. Tighten: Tighten the clutch housing bolts to 50 N.m (37 lb ft).
7. Install a NEW engine oil filter.
8. Tighten the oil drain plug. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Install the right transmission closeout cover and bolt. Tighten: Tighten the transmission closeout cover bolt to 12 N.m (106 lb in).
10. Install the starter motor. Refer to «Starter Motor Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
11. Install the left transmission closeout cover and bolt. Tighten: Tighten the transmission closeout cover bolt to 12 N.m (106 lb in).
12. Lower the vehicle.
13. Remove the engine support fixture (1-5). Refer to «Engine Support Fixture»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
14. Connect the negative battery cable. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
15. Add engine oil as necessary. Refer to «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) in Maintenance and Lubrication.
16. Check for oil leaks.

Scheme 120

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Disconnect the oil pressure sensor electrical connector (2).
3. Remove the oil pressure sensor from the engine block.

1. If installing the old sensor, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent. NOTE: Refer to Fastener Notice in Cautions and Notices.
2. Install the oil pressure sensor to the engine block. Tighten: Tighten the engine oil pressure sensor to 30 N.m (22 lb ft).
3. Connect the oil pressure sensor electrical connector (2).
4. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 121

1. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the oil pan drain plug.
3. Completely drain the engine oil.
4. Disconnect the engine oil level sensor electrical connector.
5. Remove the engine oil level sensor.

1. Install the drain plug to the oil pan. Tighten: Tighten the drain plug to 25 N.m (18 lb ft).
2. Install the engine oil level sensor. Tighten: Tighten the engine oil level sensor to 13 N.m (115 lb in).
3. Connector the engine oil level sensor electrical connector.
4. Lower the vehicle.
5. Refill the engine with oil.

Scheme 122

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Disconnect the engine oil temperature gage sensor electrical connector.
3. Remove the engine oil temperature gage sensor (732).

1. Install the engine oil temperature gage sensor (732). Tighten: Tighten the engine oil temperature gage sensor to 20 N.m (15 lb ft).
2. Connect the engine oil temperature gage sensor electrical connector.
3. Lower the vehicle.

Scheme 123

1. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-front-cover-replacement) .
2. Remove the engine oil pan. Refer to «Oil Pan Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the oil pump screen bolt and nut.
4. Remove the oil pump screen and O-ring seal.
5. Remove the O-ring seal from the pump screen.
6. Discard the O-ring seal.
7. Remove the remaining crankshaft oil deflector nuts.
8. Remove the crankshaft oil deflector.
9. Remove the oil pump bolts.
10. Remove the oil pump.
11. Clean and inspect the oil pump. Refer to «Oil Pump Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pump-cleaning-and-inspection) .

Scheme 124

1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump.
2. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block. NOTE: Refer to Fastener Notice in Cautions and Notices.
3. Install the oil pump bolts. Tighten: Tighten the oil pump bolts to 25 N.m (18 lb ft).
4. Install the crankshaft oil deflector.
5. Install the crankshaft oil deflector nuts. Tighten: Tighten the crankshaft oil deflector nuts to 25 N.m (18 lb ft).
6. Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
7. Install the NEW O-ring seal onto the oil pump screen. IMPORTANT: Push the oil pump screen tube completely into the oil pump prior to tightening the bolt. Do not allow the bolt to pull the tube into the pump. Align the oil pump screen brackets with the correct crankshaft bearing cap studs.
8. Install the oil pump screen.
9. Install the oil pump screen bolt and nut. Tighten: Tighten the oil pump screen bolt to 12 N.m (106 lb in). Tighten the oil pump screen nut to 25 N.m (18 lb ft).
10. Install the engine oil pan. Refer to «Oil Pan Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
11. Install the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-front-cover-replacement) .

Timing Chain and Sprockets Replacement

Tools Required

1. J 8433-1 Two Jaw Puller
2. J 41558 Crankshaft Sprocket Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. J 41816-2 Crankshaft End Protector
4. J 41665 Crankshaft Balancer and Sprocket Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Note. Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.

Scheme 125

1. Remove the oil pump. Refer to «Oil Pump, Pump Screen and Deflector Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the camshaft sprocket bolts.
3. Remove the camshaft sprocket and timing chain.
4. Remove the chain guide bolts and remove the chain guide.
5. Use the J 8433 , J 41816-2 and J 41558 in order to remove the crankshaft sprocket. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Remove the crankshaft sprocket.
7. Remove the crankshaft sprocket key (if required).
8. Clean and inspect the timing chain and sprockets. Refer to «Timing Chain and Sprockets Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__timing-chain-and-sprockets-cleaning-and) .

1. Install the key into the crankshaft keyway (if previously removed).
2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.
3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
4. Use the J 41665 in order to install the crankshaft sprocket. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.
6. Install the chain guide. NOTE: Refer to Fastener Notice in Cautions and Notices.
7. Install the chain guide bolts. Tighten: Tighten the chain guide bolts to 35 N.m (26 lb ft).
8. Install the camshaft sprocket and timing chain.
9. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
10. Install the camshaft sprocket bolts. Tighten: Tighten the camshaft sprocket bolts to 35 N.m (26 lb ft).
11. Install the oil pump. Refer to «Oil Pump, Pump Screen and Deflector Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Remove the engine assembly. Refer to «Engine Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Remove the left cylinder head. Refer to «Cylinder Head Replacement - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Remove the right cylinder head. Refer to «Cylinder Head Replacement - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Remove the camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
6. Remove the engine front cover. Refer to «Engine Front Cover Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-front-cover-replacement) .
7. Remove the valve lifter guide bolts (211).
8. Remove the valve lifters and guides. Refer to «Valve Lifter Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Rotate the engine in order to align the timing marks.
10. Remove the camshaft sprocket bolts.
11. Remove the timing chain from the camshaft sprocket, and allow the chain to rest on the crankshaft sprocket.
12. Remove the camshaft retainer bolts and retainer.
13. Remove the camshaft. Refer to «Camshaft Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__camshaft-removal) .
14. If the camshaft bearings need replacement, remove the rear engine cover and gasket. Refer to «Engine Rear Cover Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-rear-cover-removal) .
15. Remove the camshaft bearings if required. Refer to «Camshaft Bearing Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 126

1. Install the NEW camshaft bearings, if previously removed. Refer to «Camshaft Bearing Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Install the rear engine cover. Refer to «Engine Rear Cover Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-rear-cover-installation) .
3. Install the camshaft, the camshaft retainer, and the bolts. Refer to «Camshaft Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Install the timing chain to the camshaft sprocket.
5. Install the camshaft sprocket and bolts to the camshaft. Refer to «Timing Chain and Sprockets Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Ensure that the timing marks are aligned.
7. Install the valve lifters, valve guides, and bolts (211). Refer to «Valve Lifter Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__valve-lifter-installation) .
8. Install the engine front cover. Refer to «Engine Front Cover Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-front-cover-installation) .
9. Install the camshaft sensor. Refer to «Camshaft Position (CMP) Sensor Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
10. Install the right cylinder head. Refer to «Cylinder Head Installation - Right»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-installation-right) .
11. Install the left cylinder head. Refer to «Cylinder Head Installation - Left»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cylinder-head-installation-left) .
12. Install the intake manifold. Refer to «Intake Manifold Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__intake-manifold-installation) .
13. Install the engine assembly. Refer to «Engine Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
14. Change the engine oil and filter. Refer to «Engine Oil and Oil Filter Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
15. Fill the cooling system to the proper level. Refer to «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) in Maintenance and Lubrication.
16. Check the engine for fluid leaks.

Scheme 127

1. Remove the transmission. Refer to «Transmission Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.
2. Remove the clutch assembly (3, 4). Refer to «Clutch Assembly Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Assembly Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.
3. Mark or scribe the end of the crankshaft and the flywheel.
4. Remove the engine flywheel. Refer to «Engine Flywheel Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-flywheel-removal) .
5. Clean and inspect the engine flywheel. Refer to «Engine Flywheel Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Align the mark or scribe on the crankshaft with the mark or scribe on the existing flywheel.
2. If installing a new flywheel, refer to «Engine Balancing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-balancing) .
3. Install the engine flywheel. Refer to «Engine Flywheel Installation»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-flywheel-installation) .
4. Install the clutch assembly (3, 4). Refer to «Clutch Assembly Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Assembly Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.
5. Install the transmission. Refer to «Transmission Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.

J 42640 Steering Column Anti-rotation Pin. See Special Tools and Equipment .

1. Install the J 42640 to the steering column. Refer to «Intermediate Steering Shaft Replacement - Lower»(/cadillac/cts/i-2002-2007/remont/ignition-switchsteering-lock/#steering-wheel-steering-column) in Steering Wheel and Column for the pin installation.
2. Remove the shifter assembly mounting bolts (2). Refer to «Shift Control Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.
3. Disconnect the positive and negative battery cables from the battery. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) and «Battery Positive Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
4. Remove the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
7. Disconnect the throttle body heater outlet hose (1) from the throttle body and position the hose to the radiator.
8. Evacuate the air conditioning system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) in Heating, Ventilation and Air Conditioning.
9. Release the retainer (1) and disconnect the air conditioning suction hose from the evaporator. Refer to «Suction Hose Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__suction-hose-replacement-ls6) in Heating, Ventilation, and Air Conditioning.
10. Remove the suction hose from the retaining feature (1) on the shock tower and position the hose to the engine.
11. Release the retainer (1) and disconnect the air conditioning liquid line from the connector at the front of dash. Disconnect the line from the connector at the radiator fan shroud. Remove the liquid line from the vehicle. Refer to «Liquid Line Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__liquid-line-replacement-ls6) in Heating, Ventilation, and Air Conditioning.
12. Disconnect the brake booster vacuum hose from the brake booster. Position the hose to the engine.
13. Disconnect the brake fluid level switch electrical connector from the master cylinder.
14. Remove the master cylinder mounting nuts.
15. Remove the master cylinder brake lines from the retainers located on the left shock tower.
16. Position the master cylinder to the engine. Hold the master cylinder in place using mechanic's wire. Do not disconnect the brake lines from the master cylinder.
17. Disconnect the 2 electrical connectors, C105 and C107, at the left shock tower. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
18. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief Procedure»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
19. Disconnect the chassis fuel line (3) from the engine fuel line (4) at the right rear of the engine. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
20. Disconnect the chassis-to-engine evaporative emission (EVAP) pipe (2) at the right rear of the engine. Refer to «Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
21. Disconnect the engine wiring harness connector C102 at the front of dash. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
22. Disconnect the underhood fuse block connector C103 (3) located between the right shock tower and the cam cover. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
23. Remove the underhood electrical center cover.
24. Remove the negative battery cable bolt (1) from the fender flange near the hood shock.
25. Remove the negative battery cable from the retaining feature on the right shock tower and position the cable to the engine.
26. Remove the battery from the vehicle. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
27. Remove the positive battery cable nut from inside the underhood electrical center. Remove the cable from the electrical center and position the cable to the engine.
28. Disconnect the chassis electrical connector at the top of the right shock tower. Position the wire to the engine.
29. Disconnect the electrical connectors (1) from the throttle actuator control (TAC) module (2).
30. Remove the TAC module from the bracket mounted on the underhood electrical center. Refer to «Throttle Actuator Control (TAC) Module Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
31. Disconnect and remove the harness connectors (3, 4) located on the TAC module bracket. Position the harness to the engine.
32. Disconnect the engine wiring harness C5 connector from the inside of the underhood electrical center. Refer to «Underhood Electrical Center or Junction Block Replacement»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
33. Remove the ground strap bolt and strap from the right frame rail. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
34. Drain the cooling system. Refer to «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
35. Remove the electric cooling fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
36. Remove the radiator assembly. Refer to «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
37. Remove the air conditioner condenser assembly. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning.
38. Remove the power steering oil cooler mounting nuts (1) from the front frame assembly. Do not disconnect the lines from the cooler. Refer to «Power Steering Cooler Replacement (FE3)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (FE1)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (FE4)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
39. Position the power steering hose and the air conditioning suction hose to the engine and hold in place with mechanic's wire.
40. Remove the front tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
41. Remove the right front wheelhouse liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
42. Working through the right wheelhouse opening, remove the windshield washer reservoir-to-frame brace (2).
43. Remove the upper intermediate shaft to center intermediate shaft bolt.
44. Separate the upper intermediate shaft from the center intermediate shaft.
45. Lower the vehicle.
46. Disconnect the heater hoses from the engine.
47. Remove the 2 rear brake lines (1) from the brake pressure modulator valve (BPMV).
48. Pull the brake lines out from behind the wiring harness and secure the lines to the chassis with mechanic's wire.
49. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
50. Remove the transmission assembly. Refer to «Transmission Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.
51. Remove the concentric slave cylinder. Refer to «Clutch Concentric Actuator Cylinder Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Concentric Actuator Cylinder Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.
52. Remove the brake bundle clips from the right and left frame rails. Remove the rear brake lines from the clip on the right frame rail.
53. Remove the powertrain control module (PCM) from the PCM housing. Refer to «Powertrain Control Module (PCM) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
54. Remove the (PCM) wiring harness screws (1).
55. Remove the PCM. Secure the PCM wiring harness to the engine.
56. Lower the vehicle.
57. Remove the right and left shock module upper mounting bolts.
58. Secure the shock modules to the front frame to avoid stretching the front brake hoses.
59. Raise the vehicle enough to place a suitable lift table under the engine, front frame, and front suspension assembly.
60. Support the rear of the vehicle with suitable jackstands.
61. Raise the lift table, or lower the vehicle to preload the weight of the engine, front frame, and front suspension assembly.
62. Remove the front frame bolts.
63. With the aid of an assistant, lower the table and/or raise the vehicle to remove the engine, front frame, and suspension assembly from the vehicle.
64. Ensure that all the hoses, wires, pipes, and shock modules clear the vehicle during the removal process.
65. Install the J 41798 to the engine. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Refer to «Engine Support Fixture»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
66. Using a suitable engine lift, remove the engine from the front frame assembly.

1. Install the engine to the front frame assembly.
2. Remove the J 41798 from the engine. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Refer to «Engine Support Fixture»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. With the aid of an assistant, raise the table and/or raise the vehicle to install the engine, front frame, and suspension assembly to the vehicle.
4. Ensure that all the hoses, wires, pipes, and shock modules clear the vehicle during the installation process.
5. Install the frame bolts. Tighten: Tighten the frame bolts to 191 N.m (141 lb ft).
6. Install the right and left shock module upper mounting bolts. Tighten: Tighten the shock module bolts to 112 N.m (83 lb ft).
7. Raise the vehicle and remove the lift table.
8. Connect the wiring harness (1) to the PCM and install the PCM to the vehicle. Refer to «Powertrain Control Module (PCM) Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
9. Install the rear brake lines to the clip on the right frame rail. Install the brake bundle clips to the right and left frame rails.
10. Install the concentric slave cylinder. Refer to «Clutch Concentric Actuator Cylinder Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) or «Clutch Concentric Actuator Cylinder Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/clutches-manual-hydraulic/#manual-transmission-clutch-system) in Clutch.
11. Install the transmission assembly. Refer to «Transmission Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.
12. Lower the vehicle.
13. Route the rear brake lines in front of the wiring harness. Install the 2 rear brake lines (1) to the BPMV. Refer to «Brake Pressure Modulator Valve (BPMV) Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) or «Brake Pressure Modulator Valve (BPMV) Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) in Antilock Brake System.
14. Connect the heater hoses to the engine.
15. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
16. Install the upper intermediate shaft to center intermediate shaft. Refer to «Intermediate Steering Shaft Replacement - Center»(/cadillac/cts/i-2002-2007/remont/ignition-switchsteering-lock/#steering-wheel-steering-column) in Steering Wheel and Column.
17. Install the windshield washer reservoir-to-frame brace (2). Refer to «Washer Solvent Container Replacement (w/o CE4)»(/cadillac/cts/i-2002-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) in Wiper/Washer Systems.
18. Install the right wheelhouse liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
19. Install the front tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
20. Install the power steering hose and air conditioning suction hose into the proper positions.
21. Install the power steering oil cooler and nuts (1) to the front frame. Refer to «Power Steering Cooler Replacement (FE3)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (FE1)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) or «Power Steering Cooler Replacement (FE4)»(/cadillac/cts/i-2002-2007/remont/manual-power-steering/#power-steering-system) in Power Steering System.
22. Install the air conditioning condenser assembly. Refer to «Condenser Replacement (MAE)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (CZ3)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) or «Condenser Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in Heating, Ventilation and Air Conditioning.
23. Install the radiator assembly. Refer to «Radiator Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system__radiator-replacement-ls6) in Engine Cooling.
24. Install the electric cooling fan assembly. Refer to «Cooling Fan Replacement - Electric (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
25. Install the ground strap to the right front frame rail. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
26. Connect the engine wiring harness C5 connector at the inside of the underhood electrical center. Refer to «Underhood Electrical Center or Junction Block Replacement»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
27. Connect the wiring harness connectors (3, 4) at the TAC module bracket.
28. Install the TAC module (2) to the bracket located near the underhood electrical center. Refer to «Throttle Actuator Control (TAC) Module Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
29. Connect the electrical connectors (1) to the TAC module.
30. Connect the chassis electrical connector located at the top of the right shock tower.
31. Install the positive battery cable and nut to the inside of the underhood electrical center. Refer to «Battery Positive Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
32. Install the battery. Refer to «Battery Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
33. Install the negative battery cable to the retaining feature on the right shock tower.
34. Install the negative battery cable and bolt (1) to the right fender flange. Refer to «Battery Negative Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Negative Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
35. Install the underhood electrical center cover.
36. Connect the engine wiring harness connector C102 at the front of dash. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
37. Connect the chassis-to-engine EVAP pipe (2) at the right rear of the engine. Refer to «Evaporative Emission (EVAP) Hoses/Pipes Replacement - Engine»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
38. Connect the chassis fuel line (3) to the engine fuel line (4) at the right rear of the engine. Refer to «Quick Connect Fitting(s) Service (Metal Collar)»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
39. Connect the electrical connector C103 (3).
40. Connect the electrical connectors, C105 and C107, at the left shock tower. Refer to «Harness Routing Views»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures) in Wiring Systems.
41. Install the master cylinder. Refer to «Master Cylinder Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-replacement) in Hydraulic Brakes.
42. Install the master cylinder brake lines to the retainers at the left shock tower.
43. Connect the brake fluid level switch electrical connector.
44. Connect the brake booster vacuum line to the brake booster.
45. Install the air conditioning liquid line and retainer (1) to the vehicle. Refer to «Liquid Line Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__liquid-line-replacement-ls6) in Heating, Ventilation and Air Conditioning.
46. Install the air conditioning suction hose and retainer (1) to the front of dash and the retaining feature on the left shock tower. Refer to «Suction Hose Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__suction-hose-replacement-ls6) in Heating, Ventilation and Air Conditioning.
47. Connect the throttle body heater outlet hose (1) to the throttle body.
48. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/testing-diagnostics/#engine-controls-57l-introduction) in Engine Controls - 5.7L.
49. Install the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
50. Install the cross vehicle brace. Refer to «Brace Replacement - Cross Vehicle»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
51. Connect the battery positive and negative cables to the battery. Refer to «Battery Negative Cable Disconnect/Connect Procedure»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) and «Battery Positive Cable Replacement (LHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (RHD)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) or «Battery Positive Cable Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
52. Install the shifter assembly mounting bolts (2). Refer to «Shift Control Assembly Replacement»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed) in Manual Transmission - Tremec 6-Speed.
53. Remove the J 42640 from the steering column.
54. Fill the engine with engine oil. Refer to «Fluid and Lubricant Recommendations»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__fluid-and-lubricant-recommendations) and «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) in Maintenance and Lubrication.
55. Check the transmission fluid level and add fluid as necessary. Refer to «Transmission Fluid Level Inspection»(/cadillac/cts/i-2002-2007/remont/manual-trans/#manual-transmission-tremec-6-speed__transmission-fluid-level-inspection) in Manual Transmission - Tremec 6-Speed.
56. Fill the cooling system. Refer to «Draining and Filling Cooling System (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
57. Recharge the HVAC system. Refer to «Refrigerant Recovery and Recharging»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning__refrigerant-recovery-and-recharging) in Heating, Ventilation and Air Conditioning.

Scheme 128

1. Remove the oil fill cap.
2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
3. Place a oil drain pan under the oil pan drain plug.
4. Remove the oil pan drain plug.
5. Drain the engine oil.
6. Wipe the excess oil from the drain plug hole and plug.
7. Remove the oil filter from the engine block.
8. Wipe the excess oil from the oil filter mounting.

Scheme 129

1. Lubricate the oil filter seal with clean engine oil. NOTE: Refer to Fastener Notice in Cautions and Notices.
2. Install the oil filter to the engine block. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
3. Install the oil drain plug to the engine block. Tighten: Tighten the oil pan drain plug to 25 N.m (18 lb ft).
4. Lower the vehicle.
5. Fill the crankcase with the proper quantity and grade of engine oil. Refer to «Capacities - Approximate Fluid»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__capacities-approximate-fluid) and «Fluid and Lubricant Recommendations»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication__fluid-and-lubricant-recommendations) in Maintenance and Lubrication.
6. Operate the engine, check for leaks and oil pressure.
7. With the engine off, remove the oil level indicator.
8. Wipe the indicator with a clean cloth.
9. Install the oil level indicator.
10. Remove the oil level indicator in order to check the level.
11. Add oil if necessary.
12. Reset the engine oil life monitor. Refer to «GM Oil Life System - Resetting»(/cadillac/cts/i-2002-2007/remont/lubrication-system/#maintenance-and-lubrication) in Maintenance and Lubrication.

Off-Vehicle Repair Instructions

See Special Tools and Equipment

J 41712 Oil Pressure Switch Socket

1. Remove the oil pan drain plug and allow the oil to drain.
2. Remove the engine oil filter.
3. Remove the right rear engine block coolant drain hole plug and allow the coolant to drain.
4. Remove the left front engine block coolant drain hole plug, if applicable, and allow the coolant to drain.
5. Remove the engine block coolant heater, if applicable, and allow the coolant to drain.
6. Use the J 41712 or equivalent in order to remove the oil pressure sensor, if required.

Crankshaft Balancer Removal

Tools Required

1. J 41816 Crankshaft Balancer Remover
2. J 41816-2 Crankshaft End Protector
3. J 42386-A Flywheel Holding Tool

1. Install the J 42386-A and bolts. Use one M10 - 1.5 x 120 mm and one M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten: Tighten the J 42386-A bolts to 50 N.m (37 lb ft).
2. Remove the crankshaft balancer bolt. Do not discard the crankshaft balancer bolt. The balancer bolt will be used during the balancer installation procedure.
3. Mark or scribe the crankshaft balancer and the end of the crankshaft. Note the balancer installed position on the crankshaft for assembly. Refer to «Engine Balancing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-balancing) .
4. Use the J 41816 and the J 41816-2 in order to remove the crankshaft balancer.
5. Remove the J 42386-A and bolts.
6. Note the position of crankshaft balancer weights, if applicable. Refer to «Crankshaft Balancer Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-cleaning-and-inspection) .

Engine Flywheel Removal

1. Mark or scribe the end of the crankshaft and the flywheel. Refer to «Engine Balancing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-balancing) .
2. Remove the engine flywheel bolts.
3. Remove the engine flywheel.
4. Note the position and location of the manual transmission flywheel balance weights, if applicable.

J 43276 Clutch Pilot Bearing Remover. See Special Tools and Equipment .

1. Remove the clutch pilot bearing using the J 43276 . Install the J 43276-1 into the clutch pilot bearing. Using a wrench, secure the J 43276-1. Insert the J 43276-2 into the J 43276-1. Rotate the J 43276-2 clockwise into the J 43276-1 until the clutch pilot bearing is completely removed from the crankshaft. Rotate the J 43276-2 counterclockwise to remove the J 43276-2 from the J 43276-1. Remove the J 43276-1 from the tool body.
2. Discard the pilot bearing.

Oil Level Indicator and Tube Removal

1. Remove the oil level indicator from the tube.
2. Remove the oil level indicator tube bolt from the right cylinder head.
3. Remove the oil level indicator tube from the oil pan.
4. Remove the O-ring seal from the tube, if required.

Exhaust Manifold Removal - Left

1. Remove the spark plug wires from the spark plugs. Do not remove the spark plug wires from the ignition coils unless required.
2. Remove the exhaust manifold, bolts, and gasket.
3. Discard the gasket.
4. Remove the heat shield (603) and bolts (604) from the manifold (600), if required.

Exhaust Manifold Removal - Right

1. Remove the spark plug wires from the spark plugs. Do not remove the spark plug wires from the ignition coils unless required.
2. Remove the exhaust manifold, bolts, and gasket.
3. Discard the gasket.
4. Remove the heat shield (603) and bolts (604) from the manifold (600), if required.

Water Pump Removal

1. Remove the water pump bolts.
2. Remove the water pump and gaskets.
3. Discard the water pump gaskets.

Throttle Body Removal

1. Remove the electrical wire harness connectors from the throttle body.
2. Remove the engine coolant air bleed hose and clamp.
3. Remove the throttle body bolts.
4. Remove the throttle body.
5. Remove the throttle body gasket (509).
6. Discard the gasket.

Fuel Rail and Injectors Removal

Scheme 130

1. Note the location of the fuel rail ground strap (550) on the intake manifold. The fuel rail ground strap must be installed during assembly.
2. Remove the fuel rail bolts.
3. Remove the fuel rail, with injectors, lifting evenly from both sides of the fuel rail until all the injectors have left their bores.

Intake Manifold Removal

1. Remove the manifold absolute pressure (MAP) sensor, if required.
2. Disconnect the knock sensor wire harness connector (1) from the fuel rail stop bracket (712).
3. Remove the positive crankcase ventilation (PCV) pipe - dirty air (716) from the valley cover and intake manifold.
4. Remove the intake manifold bolts (713) and fuel rail stop bracket (712).
5. Note the location of the fuel rail ground strap (550) on the intake manifold. The fuel rail ground strap must be installed during assembly.
6. Remove the engine coolant air bleed pipe hose from the throttle body.
7. Remove the intake manifold.
8. Remove the manifold-to-cylinder head gaskets (514) from the intake manifold.
9. Discard the intake manifold gaskets.

Coolant Air Bleed Pipe Removal

1. Remove the engine coolant air bleed pipe studs (309).
2. Remove the pipe (307) and gaskets (308).
3. Remove the engine coolant air bleed cover bolts (312) and covers (313).
4. Remove the gaskets from the pipe and covers.
5. Discard the gaskets.
6. Remove the hose (311) and clamps (310) from the pipe (307).

Engine Valley Cover Removal

1. Remove the knock sensor wire harness.
2. Remove the knock sensors.
3. Remove the valley cover bolts.
4. Remove the valley cover and gasket.
5. Discard the valley cover gasket.
6. Remove the knock sensor oil seals (520) from the cover (555).

Valve Rocker Arm Cover Removal - Left

1. Remove the ignition coil and bracket assembly and bolts.
2. Remove the valve rocker arm cover bolts.
3. Remove the valve rocker arm cover.
4. Remove the gasket (504) from the cover.
5. Discard the gasket. The bolt grommets may be used again, if not damaged.
6. Remove the ignition coils, wire harness, and bolts from the bracket, if required.

Valve Rocker Arm Cover Removal - Right

1. Remove the ignition coil and bracket assembly and bolts.
2. Remove the valve rocker arm cover bolts.
3. Remove the valve rocker arm cover.
4. Remove the oil fill cap from the oil fill tube.
5. Remove the oil fill tube, if required.
6. Discard the oil fill tube.
7. Remove the gasket (504) from the cover.
8. Discard the gasket. The bolt grommets may be used again, if not damaged.
9. Remove the ignition coils, wire harness, and bolts from the bracket, if required.

Valve Rocker Arm and Push Rod Removal

1. Remove the valve rocker arm bolts.
2. Remove the valve rocker arms.
3. Remove the valve rocker arm pivot support.
4. Remove the pushrods.

Cylinder Head Removal - Left

1. Remove the spark plugs from the cylinder head.
2. Remove the cylinder head bolts.
3. Remove the cylinder head.
4. Remove the gasket.
5. Discard the gasket.
6. Discard the cylinder head bolts.

Cylinder Head Removal - Right

1. Remove the spark plugs from the cylinder head.
2. Remove the cylinder head bolts.
3. Remove the cylinder head.
4. Remove the gasket.
5. Discard the gasket.
6. Discard the cylinder head bolts.

J 3049-A Valve Lifter Remover. See Special Tools and Equipment .

1. Remove the valve lifter guide bolts (211).
2. Remove the valve lifters and guide.
3. Use the J 3049-A or equivalent in order to remove the valve lifters, if required. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Remove the valve lifters from the guide.
5. Organize or mark the components so that they can be installed in the same location from which they were removed. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .

Oil Filter, Adapter and Pan Cover Removal

1. Remove the oil filter.
2. Remove the oil temperature sensor (732).
3. Remove the oil pan cover (434), bolts (435) and gasket (433).
4. Discard the gasket.
5. Remove the oil filter fitting (438) and bypass valve (436), if required.

Oil Pan Removal

1. Remove the left closeout cover and bolt.
2. Remove the right closeout cover and bolt.
3. Remove the oil level sensor from the oil pan, if required.
4. Remove the oil pan bolts.
5. Remove the oil pan.
6. Drill (2) out the retaining rivets (1), if required.
7. Remove the oil pan gasket (426) from the oil pan.
8. Discard the gasket and rivets.
9. Remove the baffle and bolts, if required. Refer to «Oil Pan Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pan-cleaning-and-inspection) .

Engine Front Cover Removal

1. Remove the front cover bolts.
2. Remove the front cover and gasket.
3. Discard the front cover gasket.
4. Remove the crankshaft front oil seal (140) from the cover.

Engine Rear Cover Removal

1. Remove the rear cover bolts.
2. Remove the rear cover and gasket.
3. Discard the rear cover gasket.
4. Remove the crankshaft rear oil seal (141) from the cover.

Oil Pump, Pump Screen and Deflector Removal

1. Remove the oil pump screen bolt and nuts.
2. Remove the oil pump screen with O-ring seal.
3. Remove the O-ring seal from the pump screen.
4. Discard the O-ring seal.
5. Remove the remaining crankshaft oil deflector nuts.
6. Remove the crankshaft oil deflector.
7. Remove the oil pump bolts.
8. Remove the oil pump.

Timing Chain and Sprockets Removal

Tools Required

1. J 8433-1 Puller Bar
2. J 41558 Crankshaft Sprocket Remover. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. J 41816-2 Crankshaft End Protector

1. Remove the camshaft sprocket bolts.
2. Remove the camshaft sprocket and timing chain.
3. Remove the chain dampener (232) and bolts (231).
4. Use the J 8433-1 , the J 41816-2 , and the J 41558 in order to remove the crankshaft sprocket. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Remove the crankshaft sprocket.
6. Remove the crankshaft sprocket key, if required.

Camshaft Removal

1. Remove the camshaft position (CMP) sensor bolt and the sensor.
2. Remove the camshaft retainer bolts and the retainer.
3. Remove the camshaft. Install the 3 M8 - 1.25 x 100 mm bolts in the camshaft front bolt holes. Using the bolts as a handle, carefully rotate and pull the camshaft out of the engine block. Remove the bolts from the front of the camshaft.

Piston, Connecting Rod, and Bearing Removal

Tools Required

1. J 24270 Cylinder Bore Ridge Reamer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 41556 Connecting Rod Guide. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Use the J 24270 in order to remove the cylinder bore ring ridge, if required. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Turn the crankshaft until the piston is at the bottom of the stroke. Place a cloth on top of the piston. Use the J 24270 or equivalent in order to remove cylinder ring ridge. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Turn the crankshaft so the piston is at the top of the stroke. Remove the cloth. Remove the cutting debris from the cylinder and piston.
2. Remove the connecting rod bolts.
3. Remove the connecting rod cap. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
4. Install the J 41556 to the connecting rod. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Use a hammer and tap lightly on the end of the J 41556 in order to remove the piston and connecting rod assembly from the cylinder bore. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Upon removal of the piston and connecting rod assembly, assemble the connecting rod cap and bolts onto the matching connecting rod.

Crankshaft and Bearings Removal

Tools Required

1. J 6125-1B Slide Hammer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 41818 Crankshaft Bearing Cap Remover

1. Remove the crankshaft position (CKP) sensor bolt.
2. Remove the CKP sensor.
3. Remove the crankshaft bearing cap M8 bolts.
4. Remove the bearing cap M10 bolts and studs.
5. Install the J 41818 . Tighten: Tighten the J 41818 bolts to 11 N.m (100 lb in).
6. Install the J 6125-1B to the J 41818 in order to remove the crankshaft bearing caps.
7. Remove the bearing caps.
8. Remove the crankshaft.
9. Lay the crankshaft onto 2 wooden V-blocks or other protective surface.
10. Remove the crankshaft bearings from the bearing caps and the engine block.
11. Mark, sort, or organize the crankshaft bearings so they may be installed to their original position and location. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .

J 41712 Oil Pressure Switch Socket

1. Use the J 41712 or equivalent in order to remove the oil pressure sensor, if not previously removed.
2. Remove the engine block right side coolant drain hole plug.
3. Remove the engine block coolant heater, if applicable.
4. Remove the engine block left side coolant drain hole plug, if applicable.
5. Remove the engine block left front oil gallery plug.
6. Remove the engine block left rear oil gallery plug.
7. Inspect the block plug sealing washers. If the block plug and coolant heater sealing washers are not damaged, they may be used during assembly.
8. Remove the engine block rear oil gallery plug.
9. Inspect the O-ring seal of the rear oil gallery plug. If the O-ring seal is not cut or damaged, the plug and O-ring seal may be used during assembly.
10. Remove the engine block front oil gallery plug.

Engine Block Cleaning and Inspection

Tools Required

1. J 8087 Cylinder Bore Gage
2. J 42385-100 Head/Main Bolt Thread Repair Kit

1. Clean the following areas: NOTE: Do not use a caustic solution to clean the aluminum engine block. IMPORTANT: When cleaning an engine block in a thermal type oven, do not exceed 232°C (450°F). The engine block in the solvent Remove all sludge, dirt, or debris. Refer to «Cleanliness and Care»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cleanliness-and-care) . CAUTION: Refer to Safety Glasses Caution in Cautions and Notices. Dry the block with compressed air. The gasket surfaces Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . The coolant passages The oil galleries The main bearing caps The engine block head bolt holes for threadlocking material Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.
2. Inspect the following areas: The cylinder walls for excessive scratches, gouging, or ring ridge The coolant jacket for cracks The valve lifter bores for excessive scoring or wear The crankshaft bearing webs for cracks The gasket sealing surfaces for excessive scratches or gouging Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . The oil galleries for restrictions All threaded bolt holes for damage
3. Measure the cylinder bores for oversize.

Scheme 131

1. Adjust the micrometer to 99.0 mm (3.897 in).
2. Insert the J 8087 into the micrometer and zero the bore gauge dial.
3. Use a bore gage and measure the cylinder bore for oversize. Slide the bore gage up and down throughout the length of the cylinder bore. Check the bore both parallel and perpendicular to the centerline of the crankshaft. A cylinder that measures 99.0-99.018 mm (3.897-3.898 in) may be honed and serviced with a standard size piston. A cylinder bore that exceeds the maximum diameter must be serviced with an oversized piston.

Boring Procedure

1. A 0.25 mm (0.01 in) oversize service piston and piston ring set are available for the LCT engine.
2. It is recommended to hone the cylinder to achieve proper fit for the oversize piston. Refer to the Cylinder Honing information for the proper honing procedure.

Scheme 132

1. When honing the cylinders, follow the manufacturer's recommendations for equipment use, cleaning, and lubrication. Use only clean, sharp stones of the proper grade for the amount of material you remove. Dull, dirty stones cut unevenly and generate excessive heat. Do not hone to final clearance with a coarse or medium-grade stone. Leave sufficient metal so that all stone marks may be removed with fine-grade stones. Perform final honing with a fine-grade stone, honing the cylinder to the proper clearance.
2. During the honing operation, thoroughly clean the cylinder bore. Repeatedly check the cylinder bore for fit with the selected piston. All measurements of the piston or the cylinder bore should be made with the components at normal room temperature.
3. When honing a cylinder for fit to an oversize piston, first perform the preliminary honing with a 100 grit stone.
4. Perform final cylinder honing with a 240 grit stone and obtain a 45 degree cross hatch pattern. A 240 grit stone is preferred for final honing. If a 240 grit stone is not available, a 220 grit stone may be used as a substitute.
5. Repeatedly check the measurement at the top, the middle, and the bottom of the bore.
6. The finish marks should be clean but not sharp. The finish marks should also be free from imbedded particles and torn or folded metal.
7. By measuring the selected piston at the sizing point and by adding the average of the clearance specification, you can determine the final cylinder honing dimension required.
8. After final honing and before the piston is checked for fit, clean the cylinder bores with hot water and detergent. Scrub the bores with a stiff bristle brush and rinse the bores thoroughly with hot water. Do not allow any abrasive material to remain in the cylinder bores. This abrasive material may cause premature wear of the new piston rings and the cylinder bores. Abrasive material will also contaminate the engine oil and may cause premature wear of the bearings. After washing the cylinder bore, dry the bore with a clean rag.
9. Perform final measurements of the piston and the cylinder bore.
10. Permanently mark the top of the piston for the specific cylinder to which it has been fitted.
11. Apply clean engine oil to each cylinder bore in order to prevent rusting.

Scheme 133

Using a ball type or self centering honing tool, deglaze the cylinder bore lightly. Deglazing should be done only to remove any deposits that may have formed. Use a 240 grit stone of silicone carbide or equivalent material when preforming the deglazing procedure.

A 240 grit stone is preferred for final honing. If a 240 grit stone is not available, a 220 grit stone may be used as a substitute.

Crankshaft and Bearings Cleaning and Inspection

Tools Required

1. J 6125-1B Slide Hammer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 7872 Magnetic Base Dial Indicator Set
3. J 41818 Crankshaft Bearing Cap Remover
4. J 45059 Angle Meter

Cleaning Procedure

1. Clean the crankshaft with solvent.
2. Thoroughly clean all oil passages and inspect for restrictions or burrs.
3. Dry the crankshaft with compressed air.

Inspection Procedure

1. Perform a visual inspection of the crankshaft for damage.
2. Inspect the crankshaft position (CKP) reluctor ring lobes for damage.
3. Inspect the crankshaft journals for wear (1). Journals should be smooth with no signs of scoring, wear, or damage.
4. Inspect the crankshaft journals for grooves or scoring (2).
5. Inspect the crankshaft journals for scratches or wear (3).
6. Inspect the crankshaft journals for pitting or imbedded bearing material (4).
7. Inspect the crankshaft key (122), keyway (1), and threaded hole (2) for damage.
8. Measure the crankpins for the out-of-round.
9. Measure the crankpins for taper.
10. Measure the crankshaft thrust wall width. A crankshaft with a thrust wall width in excess of 26.2 mm (1.0315 in) must be replaced.
11. Measure the crankshaft runout. Use wooden V blocks or a fixture to support the crankshaft on the front and rear journals.
12. Use the J 7872 in order to measure the crankshaft runout at the front and rear intermediate journals.
13. Use the J 7872 in order to measure the runout of the crankshaft rear flange.
14. Use the J 7872 in order to measure the runout of the crankshaft position reluctor ring. Reluctor ring runout should be measured 1.0 mm (0.04 in) below the ring teeth. If the reluctor ring has runout in excess of 0.7 mm (0.028 in), replace the crankshaft.
15. Inspect the crankshaft rear oil gallery plug for a loose fit or leaking.
16. Inspect crankshaft bearings for craters or pockets. Flattened sections on the bearing halves also indicate fatigue.
17. Inspect the crankshaft bearings for excessive scoring or discoloration.
18. Inspect the crankshaft bearings for dirt or debris imbedded into the bearing material.
19. Inspect the crankshaft bearings for improper seating indicated by bright, polished sections of the bearing. If the lower half of the bearing is worn or damaged, both upper and lower halves should be replaced. Generally, if the lower half is suitable for use, the upper half should also be suitable for use.

Measuring Main Bearing Clearance - Gaging Plastic Method

1. Remove the bearing cap M8 bolts.
2. Remove the bearing cap M10 bolts and studs.
3. Install the J 41818 to the bearing cap. Tighten: Tighten the J 41818 bolts to 11 N.m (100 lb in).
4. Install the J 6125-1B to the. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . J 41818 in order to remove the bearing cap.
5. Remove the bearing cap and lower bearing.
6. Install gaging plastic onto the crankshaft journal. Install the gaging plastic the full width of crankshaft bearing journal.
7. Install the bearing, bearing cap, bolts and studs. Tighten: Tighten the M10 bolts (1-10) a first pass in sequence to 20 N.m (15 lb ft). Tighten the M10 bolts (1-10) a final pass in sequence to 80 degrees using the J 45059 . Tighten the M10 studs (11-20) a first pass in sequence to 20 N.m (15 lb ft). Tighten the M10 studs (11-20) a final pass in sequence to 53 degrees using the J 45059 . Tighten the M8 bolts to 25 N.m (18 lb ft). Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap.
8. Remove the bearing cap M8 bolts.
9. Remove the bearing cap M10 bolts and studs.
10. Use the J 41818 and the J 6125-1B in order to remove the bearing cap. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
11. Measure the gaging plastic at its widest area using the scale supplied with the plastic gaging kit. If the gaging plastic shows irregularity in the journal exceeding 0.025 mm (0.001 in), remove the crankshaft and measure the journal with a micrometer. If the bearing clearance is greater than 0.065 mm (0.0025 in), select and install an undersized bearing set, and measure the clearance with gaging plastic. If clearance cannot be brought to specifications, replace the crankshaft or grind the crankshaft for use with the next undersized bearing.
12. Measure the crankshaft end play. Thrust the crankshaft forward or rearward. Insert a feeler gage between the center crankshaft bearing and the bearing surface of the crankshaft and measure the bearing clearance. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) . If the bearing clearance is not within specifications: Inspect the thrust surfaces for nicks, gouges or raised metal. Minor imperfections may be removed with a fine stone. Replace the thrust bearings and measure the end play. If the correct measurements cannot be obtained, repair the crankshaft thrust surfaces or replace the crankshaft.

Measuring Connecting Rod Bearing Clearance - Gaging Plastic Method

1. Remove the bearing cap, bearing half and bolts.
2. Install the gaging plastic onto the connecting rod bearing journal. Install the gaging plastic the full width of the journal.
3. Install the bearing cap, bearing, and bolts. Tighten: Tighten the connecting rod bolts first pass to 20 N.m (15 lb ft). Tighten the connecting rod bolts final pass to 75 degrees using the J 45059 .
4. Remove the bearing cap, bearing, and bolts.
5. Measure the gaging plastic at its widest area using the scale supplied with the plastic gaging kit. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .

Measuring Connecting Rod Bearing Clearance - Using J 43690/J 43690-100

J 43690 and J 43690-100 have been developed as a more accurate method to measure connecting rod bearing clearances. The instructions below provide an overview of tool set-up and usage. For more detailed information, refer to the tool instruction sheets as supplied by the tool manufacturer.

Scheme 134

J 43690

1. J 43690-20 Swivel Base (1)
2. J 43690-19 Dial Indicator (2)
3. J 43690-2 Base (3)
4. J 43690-5, -6 Handle (4)
5. J 43690-10, -11 Foot (5)
6. 280307 Screw (6)
7. J 43690-1 Pivot Arm Assembly (7)
8. J 43690-3, -7, -8 Screws (8)
9. 280319 Screw (9)
10. 280311 Screw (10)
11. J 43690-17, -18 Adapter (11)
12. 280310 Pin (12)

Scheme 135

J 43690-100

1. J 43690-104 Spacer (1)
2. J 43690-105 Retainer Plate (2)
3. 505478 Bolt (3)
4. 511341 Bolt (4)
5. J 43690-106 Retainer Plate (5)
6. J 43690-107 Cap (6)
7. J 43690-102 Foot (7)
8. J 43690-101 Pivot Arm Assembly (8)
9. J 43690-103 Adapter (9)
10. 505439 Adapter (10)

Scheme 136

1. Rotate the crankshaft until the journal/connecting rod to be measured is in the 12 o'clock position.
2. Remove a bearing cap and bolts (1).
3. Remove the bearing half (2).
4. Insert a piece of paper card stock onto the crankshaft journal.
5. Install the bearing half (2) and cap and bolts (1). Refer to «Fastener Tightening Specifications»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__fastener-tightening-specifications) .
6. Install the following: J 43690-2 (5) J 43690-3 (4) J 43690-101 (2) 280310 (3) J 43690-5 (1)
7. Install the swivel base (1) and dial indicator (2).
8. Adjust per the manufacturers instructions and measure the connecting rod bearing clearance. A connecting rod with a clearance in excess of 0.076 mm (0.003 in) is considered excessive. Service components as required.

Crankshaft Balancer Cleaning and Inspection

1. Clean the crankshaft balancer in solvent.
2. Clean the belt grooves of all dirt or debris with a wire brush.
3. Dry the crankshaft balancer with compressed air.
4. Inspect the crankshaft balancer for the following: Loose or improperly installed balance weights, manual transmission applications A properly installed balance weight should be installed until flush or below flush with the face of the balancer. Worn, grooved, or damaged hub seal surface A crankshaft balancer hub seal surface with excessive scoring, grooves, rust or other damage must be replaced. Minor imperfections on the hub seal surface may be removed with polishing compound or fine grade emery cloth. IMPORTANT: In order for the belt to track properly, the belt grooves should be free of all dirt or debris. Dirty or damaged belt grooves The balancer belt grooves should be free of any nicks, gouges, or other damage that may not allow the belt to track properly. Minor imperfections may be removed with a fine file. Worn, chunking or deteriorated rubber between the hub and pulley

Replacing the Crankshaft Balancer and Balance Weights

1. Check the crankshaft balancer weight holes for any existing balance weights.
2. Use a punch and position the balance weights to the bottom of the weight holes.
3. With a marking crayon, note the weight holes containing balance weights.
4. Lay the old crankshaft balancer on a bench or flat table. Rotate the old balancer until one of the marked balance weight holes is in the 12 o'clock position.
5. Lay the new crankshaft balancer on the bench next to the old balancer. Rotate the new balancer until one of the balance weight holes is in the 12 o'clock position.
6. With a marking crayon, mark the new balancer weight hole located in the 12 o'clock position.
7. Viewing the old balancer, note the position of the crankshaft-to-balancer alignment mark. Mark the new balancer in the same location.
8. Measure the distance from the top of the balance weights to the face of the old crankshaft balancer.
9. Record the readings.
10. Determine the proper balance weight size for the new balancer. A balance weight hole depth that measures 13.0 mm (0.512 in), has a short balance weight in the hole. A balance weight hole depth that measures 6.69 mm (0.263 in), has a medium balance weight in the hole. A balance weight hole that depth measures 0.29 mm (0.011 in), has a long balance weight in the hole. A short balance weight will measure 12.7 mm (0.5 in) in length. A medium balance weight will measure 19.0 mm (0.75 in) in length. A long balance weight will measure 25.4 mm (1.0 in) in length.
11. Insert new crankshaft balance weights of the proper size into the new balancer in the same location as with the old balancer. A properly installed balance weight will be either flush or below flush with the face of the balancer.

Scheme 137

1. Clean the flywheel in solvent.
2. Dry the flywheel with compressed air.
3. Inspect the manual transmission flywheel for loose or improperly installed balance weights. A properly installed balance weight should be installed until flush or below flush with the face of the flywheel.
4. Inspect the manual transmission flywheel for the following conditions: Pitted surface (1) Grooved or scored surface (2) Rusted surface (3) Damaged ring gear teeth (4) Loose or improperly positioned ring gear The ring gear has an interference fit onto the flywheel and should be positioned completely against the flange of the flywheel. Missing, bent, or damaged pressure plate locating pins The 2 locating pins are installed into the flywheel and spaced 170 degrees apart to ensure proper orientation of the clutch pressure plate to the engine flywheel during assembly.

J 24086-C Piston Pin Remover/Installer Set. See Special Tools and Equipment .

Disassembly Procedure

1. Remove the connecting rod bearings (3) from the rod (2) and cap (4).
2. Using piston ring pliers, remove the piston rings from the piston.
3. Install fork insert J 24086-920A into J 24086-10 .
4. Install the piston and connecting rod assembly onto J 24086-10 .
5. Install J 24086-107 to the piston pin.
6. Install J 24086-88A through the fixture and to the J 24086-107.
7. Press the piston pin from the piston and connecting rod assembly.

Full-Floating Piston Pin

1. Remove the connecting rod bearings (3) from the rod (2) and cap (4).
2. Using piston ring pliers, remove the piston rings from the piston.
3. Rotate the piston pin retaining clips until the ring end gap is positioned in the cutout area (1) of the pin bore.
4. Remove the clips starting in the cutout area of the pin bore.
5. Remove the pin from the piston and connecting rod.
6. The piston and pin are a matched set and are not to be serviced separately. Mark, sort, or organize the piston and the matching piston pin.

Piston, Connecting Rod, and Bearings Cleaning and Inspection

Scheme 138

1. Clean the varnish and carbon from the piston (1) using cleaning solvent.
2. Dry the components with compressed air.
3. Clean the piston ring grooves with a suitable ring groove cleaning tool.
4. Clean the oil lubrication holes and slots.
5. Inspect the piston for the following conditions: Cracks in the piston ring lands, the piston skirt, or pin bosses Piston ring grooves for nicks, burrs, or warpage which may cause the piston ring to bind MINOR imperfections may be removed from the piston with a fine file. Scuffed or damaged skirts (2) Eroded areas at the top of the piston (1) Scoring to the full-floating design piston pin bore (3) or piston pin
6. Identify the NEW upper and lower compression rings. The upper compression ring can be identified by a paint mark (3) located 180 degrees from the end gap. The lower compression ring can be identified by a paint mark (3) located 90 degrees from the end gap. Both rings should be installed with the orientation marks (1, 2) facing the top of the piston.
7. Insert the edge of the piston ring into the piston ring groove. Roll the piston ring completely around the piston. If binding is caused by distorted ring groove, MINOR imperfections may be removed with a fine file. If binding is caused by a distorted piston ring, replace the rings as required.
8. Measure the piston ring side clearance with a feeler gauge. If side clearance is not within specifications, try another piston ring. If the proper ring-to- groove clearance cannot be obtained, replace the first design press-fit piston, pin, and connecting rod assembly. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
9. To determine piston pin-to-bore clearance, use a micrometer and measure the piston pin outside diameter (OD).
10. To determine the piston pin-to-bore clearance, use an inside micrometer and measure the piston pin bore inside diameter (ID).
11. Subtract the piston pin OD measurement from the piston pin bore ID measurement to determine pin-to-bore clearance. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .

Measuring Piston Ring End Gap

1. Identify the NEW upper and lower compression rings. The upper compression ring can be identified by a paint mark (3) located 180 degrees from the end gap. The lower compression ring can be identified by a paint mark (3) located 90 degrees from the end gap. Both rings should be installed with the orientation marks (1, 2) facing the top of the piston.
2. Place the piston ring into the cylinder bore 6.5 mm (0.25 in) below the top of the ring travel area.
3. Insert a feeler gage and measure the piston ring end gap. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .

Connecting Rod and Bearings

1. Clean the connecting rod (2) and cap (4) in solvent.
2. Dry the components with compressed air.
3. Inspect the connecting rod for the following conditions: Twisting (1) Proper fit of the connecting rod and cap mating surfaces (2) Nicks or gouges in the bearing bore (3) Damage to the bearing locating slots (4)
4. Measure the connecting rod bearing bore (1) for an out-of-round condition. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
5. To determine piston pin-to-connecting rod bore clearance, use a micrometer and measure the piston pin outside diameter (OD).
6. To determine piston pin-to-connecting rod bore clearance, use a micrometer and measure the connecting rod pin bore (1) inside diameter (ID).
7. Subtract the piston pin OD measurement from the connecting rod pin bore ID measurement to determine pin-to-bore clearance. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
8. Inspect the connecting rod bearings for craters or pockets. Flattened sections on the bearing halves indicate fatigue.
9. Inspect the connecting rod bearings for excessive scoring or discoloration.
10. Inspect the connecting rod bearings for dirt or debris imbedded into the bearing material.
11. Inspect the connecting rod bearings for improper seating indicated by bright, polished sections of the bearing surface.

J 24086-C Piston Pin Remover/Installer Set. See Special Tools and Equipment .

Scheme 139

Scheme 140

1. Install fork insert J 24086-920 into J 24086-10 .
2. Use a torch and apply MILD heat to the pin end of the connecting rod. Mild heating of the connecting rod will ease in piston and pin assembly.
3. Identify the positioning tab (1) or flat flange (3) of the connecting rod. When properly assembled, the positioning tab or flat flange of the rod and the mark (2) on the top of the piston should both be facing the front of the engine.
4. Assemble the piston, the connecting rod, and the J 24086-16A.
5. Adjust the J 24086-9 to I 8.
6. Install the piston, connecting rod, piston pin, and J 24086-16A to the J 24086-10 .
7. Insert J 24086-9 through J 24086-10 and to the piston pin.
8. Press J 24086-9 until the installer bottoms on the J 24086-10 .
9. Inspect the piston (1), pin (3), and connecting rod (2) for proper assembly. When properly installed, the piston pin (3) should be centered in the connecting rod (2).
10. Identify the compression and oil control rings for proper installation. The upper compression ring can be identified by a paint mark (3) located 180 degrees from the end gap. The lower compression ring can be identified by a paint mark (3) located 90 degrees from the end gap. Both rings should be installed with the orientation marks (1, 2) facing the top of the piston.
11. Using piston ring pliers, install the piston rings onto the piston.
12. Position the oil control ring end gaps a minimum of 25 mm (1.0 in) from each other.
13. Position the compression ring end gaps 180 degrees opposite each other.
14. Install the connecting rod bearings (3) to the rod (2) and cap (4).

1. Install the retaining clip. The clip should be seated in the groove of the pin bore.
2. Install the piston pin to the piston and connecting rod.
3. Install the retaining clip. The clip should be seated in the groove of the pin bore.
4. Identify the compression and oil control rings for proper installation. The upper compression ring can be identified by a paint mark (3) located 180 degrees from the end gap. The lower compression ring can be identified by a paint mark (3) located 90 degrees from the end gap. Both rings should be installed with the orientation marks (1, 2) facing the top of the piston.
5. Using piston ring pliers, install the piston rings onto the piston.
6. Position the oil control ring end gaps a minimum of 25 mm (1.0 in) from each other.
7. Position the compression ring end gaps 180 degrees opposite each other.
8. Install the connecting rod bearings (3) to the rod (2) and cap (4).

J 33049 Camshaft Bearing Service Set. See Special Tools and Equipment .

1. Prior to bearing removal, inspect the camshaft bearings for loose fit in the engine block bearing bores. Refer to «Camshaft and Bearings Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__camshaft-and-bearings-cleaning-and-inspection) .
2. Repair or replace the components as required.
3. Select the expanding driver (4-8) and washer (2 or 3) from the tool usage information.
4. Assemble the J 33049 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Insert the tool through the front of the engine block and into the bearing.
6. Tighten the expander assembly (15) nut until snug.
7. Push the guide cone (1) into the front camshaft bearing to align the tool.
8. Drive the bearing from the block bore.
9. Repeat the above procedures to remove the remaining bearings.

Tool Usage Information

1. The tool consists of a guide cone (1), driving washers (2 or 3), expander bearing drivers (4-8), driver bars (9 or 10), expander jaws (11), expander sleeve (12), expander cone (13), expander shaft (14), and expander assembly (15).
2. Expander bearing driver number one inside diameter is 28.575-37.465 mm (1.125-1.475 in) and is used with the expander assembly and the small washer.
3. Expander bearing driver number 2 inside diameter is 37.465-43.18 mm (1.475-1.7 in) and is used with number 1 expanding driver and the small washer.
4. Expander bearing driver number 3 inside diameter is 43.18-48.895 mm (1.7-1.925 in) and is used with number 2 expanding driver and the large washer.
5. Expander bearing driver number 4 inside diameter is 48.895-54.61 mm (1.925-2.15 in) and is used with number 3 expanding driver and the large washer.
6. Expander bearing driver number 5 inside diameter is 54.61-60.325 mm (2.15-2.375 in) and is used with number 4 expanding driver and the large washer.
7. Expander bearing driver number 6 inside diameter is 60.325-68.326 mm (2.375-2.69 in) and is used with number 5 expanding driver and the large washer.

Tool Assembly and Operation

1. Select the proper expanding driver and washer from the expanding driver and washer information.
2. Place the expanding driver onto the expander assembly.
3. Check to ensure that the separation lines between the segments of the expanding driver align with the separation lines of the expander assembly.
4. Place the guide cone over the driving bar, with the small end of the cone facing the driver assembly.
5. Place the driving washer over the threaded portion of the expander assembly.
6. Screw the expander assembly, with driving washer, onto the driving bar. It may be necessary to install the driver bar extension for removal of the inner bearings.
7. Insert the tool into a inner camshaft bearing and tighten until snug. Operate the tool from the front or rear of the engine block. On some engine blocks, the nut on the expander assembly is inaccessible except from either end. In this case you must use a socket and extension to enlarge and reduce the expander assembly.
8. Slide the nylon cone into the front or rear camshaft bearing. This will properly align the tool.
9. Drive the bearing out of or into the engine block.
10. Repeat the procedure for the additional inner bearings.
11. For the 2 end bearings, front and rear, remove the nylon cone and driver bar extension.
12. Drive the bearings out of or into the engine block.

Camshaft and Bearings Cleaning and Inspection

Tools Required

1. J 7872 Magnetic Base Dial Indicator Set
2. J 8520 Camshaft Lobe Lift Indicator. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Scheme 141

1. Clean the components in solvent.
2. Dry the components with compressed air.
3. Inspect the camshaft bearing journals (1) for scoring or excessive wear.
4. Inspect the camshaft valve lifter lobes (2) for scoring or excessive wear.
5. Inspect the threaded bolt holes (3) in the front of the camshaft for damaged threads or debris.
6. Inspect the camshaft sprocket pin (204) for damage.
7. Inspect the camshaft position (CMP) reluctor ring for nicks or damage.
8. Inspect the camshaft retainer plate for wear or a damaged sealing gasket. If the camshaft retainer plate sealing gasket is not cut or damaged, it may be used again.
9. Inspect the camshaft bearings for proper fit in the engine block. The camshaft bearings have an interference fit to the engine block and should not be loose in their engine block bearing bores.
10. Inspect the camshaft bearings for excessive wear or scoring. Bearings with excessive scoring or wear must be replaced.
11. Measure the camshaft journals for wear and out-of-round with a micrometer. A camshaft with bearing journals that measure more than 0.025 mm (0.001 in) out-of-round, must be replaced. A camshaft with bearing journal diameters that measure less that 54.99 mm (2.164 in), must be replaced.
12. Measure the camshaft lobes for wear with a micrometer. An LS1 camshaft with an intake lobe that measures 46.31 mm (1.823 in) or less, must be replaced. An LS1 camshaft with an exhaust lobe that measures 46.31 mm (1.823 in) or less, must be replaced. An LS6 camshaft with an intake lobe that measures 46.24 mm (1.82 in) or less, must be replaced. An LS6 camshaft with an exhaust lobe that measures 46.19 mm (1.818 in) or less, must be replaced.
13. Measure the camshaft runout. Mount the camshaft in wooden V-blocks or between centers on a fixture. Check the runout of the intermediate camshaft bearing journals using the J 7872 . If camshaft runout exceeds 0.05 mm (0.002 in), the camshaft is bent and should be replaced.

Measuring Camshaft Lobe Lift

1. Measure camshaft lobe lift using J 8520 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Remove the valve rocker arms and bolts Install the dial indicator mounting stud into the valve rocker arm bolt hole. Assemble the components of the J 8520 and position onto the stud. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Position the shaft of the dial indicator onto the end of the pushrod. Rotate the face of the dial indicator to zero. Slowly rotate the crankshaft clockwise until the dial indicator obtains its highest and lowest readings. Compare the total lift shown to specifications. The proper lobe lift for the LS1 intake lobes is 6.96 mm (0.274 in). The proper lobe lift for the LS1 exhaust lobes is 7.13 mm (0.281 in). The proper lobe lift for the LS6 intake lobes is 8.24 mm (0.324 in). The proper lobe lift for the LS6 exhaust lobes is 8.19 mm (0.322 in). Remove the tool.
2. Compare measurements to specifications. If the readings are not within specifications, remove the camshaft. Inspect and/or replace components as required.

J 33049 Camshaft Bearing Service Set. See Special Tools and Equipment .

1. Measure the engine block camshaft bearing bores (1-5) to identify the correct OD size bearing for each position. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
2. Select the expanding driver (4-8) and washer (2 or 3) from the J 33049 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Refer to «Camshaft Bearing Removal»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Assemble the tool.
4. Insert the tool through the front of the engine block and into the bearing.
5. Tighten the expander assembly nut until snug.
6. Push the guide cone into the front camshaft bearing to align the tool.
7. Drive the bearing into the block bore.
8. Repeat the above procedures to install the remaining bearings.

Timing Chain and Sprockets Cleaning and Inspection

1. Clean the components with cleaning solvent.
2. Dry the components with compressed air.
3. Inspect the timing chain for binding or wear.
4. Inspect the camshaft and crankshaft sprockets for: Worn teeth (1) Damaged teeth (2) Chipped teeth (3) Worn valleys between the sprocket teeth
5. Inspect the crankshaft sprocket keyway for wear.
6. Inspect the crankshaft sprocket oil pump drive splines for wear.
7. Inspect the chain dampener (232) for the following conditions: Loose metal inserts (1) Cracking (2) in the chain contact area Excessive grooves (3) in the chain contact area Grooves 1 mm (0.040 in) or less in depth are to be considered normal wear.

Scheme 142

1. Mark, sort, or organize the components for assembly. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
2. Clean the components with cleaning solvent.
3. Dry the components with compressed air.
4. Inspect the valve rocker arms bearings (2) for binding or roughness.
5. Inspect the valve rocker arm pushrod sockets (3) and valve stem mating surfaces (1). These surfaces should be smooth with no scoring or exceptional wear.
6. Inspect the pushrods for worn or scored ends. These surfaces should be smooth with no scoring or exceptional wear.
7. Inspect the pushrods for bends. Roll the pushrod on a flat surface to determine if the pushrod is bent.
8. Inspect the pushrod oil passages for restrictions.
9. Inspect the pivot supports for cracks, wear, or other damage.

Scheme 143

1. Mark, sort, or organize the components for assembly. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
2. Clean the components in cleaning solvent.
3. Dry the components with compressed air.
4. Inspect the valve lifters for the following conditions: Bent or broken clip (1) Worn pushrod socket (2) Scuffed or worn sides (3) If the valve lifter shows wear, inspect the engine block lifter bores for wear or damage. Flat spots on the roller (4) Loose or damaged pin (5) Plugged oil hole (6) Worn or damaged roller bearing The roller should rotate freely with no binding or roughness.
5. Inspect the valve lifter guides for the following: For cracks or damage Excessive wear in the lifter mounting bores

J 8062 Valve Spring Compressor

1. Remove the spark plugs from the cylinder heads.
2. Use the J 8062 in order to compress the valve spring.
3. Remove the valve stem keys (225).
4. Remove the valve spring cap (224).
5. Remove the valve spring (223).
6. Remove the valves (227 and 228).
7. Remove the valve stem oil seal (222). Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
8. Remove the cylinder head expansion plugs (226), if required.
9. Remove the coolant sensor from the left cylinder head.
10. Remove the coolant plug from the right cylinder head.

Cylinder Head Cleaning and Inspection

Tools Required

1. J 8089 Carbon Removing Brush
2. J 9666 Valve Spring Tester

Scheme 144

1. Clean the following components: IMPORTANT: Be careful not to scuff the chamber. Use the J 8089 in order to remove the carbon from the combustion chambers. Gasket surfaces Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Valve stems and heads on a buffing wheel Bolt hole threads Remove all dirt, debris, or threadlocking material from the bolt holes.
2. Inspect for the following conditions: The cylinder head (218) for cracks in the exhaust ports and combustion chambers The cylinder head for external cracks in the water chambers The gasket surfaces for excessive scratches or gouging Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . The bolt hole threads for debris or damaged threads Refer to «Thread Repair»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__thread-repair) or «Thread Repair Specifications»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Inspect the cylinder head for warpage.
4. Inspect the valve springs for squareness.
5. Use the J 9666 in order to measure the valve spring tension. Replace the LS1 spring if the spring tension is less than 310 N (70 lb) at 45.75 mm (1.80 in). Replace the LS6 spring if the spring tension is less than 400 N (90 lb) at 45.75 mm (1.80 in).

J 37378-1 Valve Guide Reamer. See Special Tools and Equipment .

Reaming Procedure

1. Measure the valve stem-to-guide clearance using a dial indicator. Valve stem-to-guide clearance may also be obtained by using a micrometer to measure the valve stem diameter and a ball type measuring gage to measure the guide bore.
2. A valve stem (1) and guide (2) with clearance in excess of 0.093 mm (0.0037 in) must be repaired or the components replaced.
3. Inspect the valve stems for excessive scoring, wear, or warpage. A valve stem that has excessive scoring (3 or 4) or wear (4 or 6) must be replaced. A valve guide that is worn and has excessive stem-to-guide clearance should be reamed and valves with oversize stems installed.
4. Measure the valve stem diameter. A valve stem with a diameter less than 7.95 mm (0.313 in) must be replaced. Position the tip of the dial indicator at the top of the valve guide. If the valve stem diameter is within specifications, and the stem-to-guide clearance is excessive, the valve guide must be reamed oversize and a valve with oversize stem installed.
5. Ream the valve guide using the J 37378-1 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
6. Clean the guide bore of all metal shavings and debris.
7. Install the valve (227 and 228), with oversize stem, into the cylinder head (218).
8. Inspect the valve for proper fit. Move the valve back and forth in the guide. The valve should move freely with no resistance or drag.

Valve and Seat Grinding

1. Inspect the valve for the following conditions: Burnt or eroded areas (1) A worn margin (2) A bent stem (3) A worn or scored stem (4) A worn key groove (5) A worn stem tip (6)
2. Inspect the valve face for the following conditions: Worn or no margin (1 or 4) Pitted surfaces (2) Burnt or eroded areas (3)
3. Inspect the valve margin. The exhaust valve may be refaced if the margin is greater than 1.25 mm (0.05 in) thick before grinding.
4. Reface pitted exhaust valves on a suitable valve refacing machine.
5. Replace the valve if the margin is less than 1.25 mm (0.05 in) thick after grinding.
6. If the valve face has been ground, it may be necessary to shim the valve spring to obtain the proper spring installed height. Refer to «Cylinder Head Assemble»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
7. Inspect for a loose valve seat in the cylinder head (218). The valve seat has an interference fit to the cylinder head.
8. Clean the valve guide bores with a suitable tool. Remove all carbon or dirt from the bores. The valve guide must be clean for the seat grinding tool to obtain proper results.
9. Grind the valve seat. The recommendations of the manufacturer of the equipment should be followed carefully to obtain the proper results. Regardless of what type of equipment is used, it is essential that valve guide bores be free from carbon or dirt to ensure proper centering of the tool pilot in the guide.
10. Inspect the valve seats. The valve seats should be concentric to within 0.05 mm (0.0021 in) total indicator reading. If the valve seat has been ground, it may be necessary to shim the valve spring to attain the proper spring installed height. Refer to «Cylinder Head Assemble»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

J 8062 Valve Spring Compressor

Scheme 145

1. Clean the cylinder head valve spring shim area.
2. Install the valves (227 and 228) into the proper port. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
3. Install the valve stem oil seal (222).
4. Install the valve spring (223).
5. Install the valve spring cap (224).
6. Compress the valve spring using the J 8062 .
7. Install the valve stem keys. Use grease to hold the keys in place and remove the J 8062 . Ensure the keys seat properly in the groove of the valve stem. Tap the end to the valve stem with a plastic faced hammer to seat the keys, if necessary.
8. Measure the valve spring installed height using a ruler. Measure from the base of the valve spring to the top of the valve spring. Specification: If the installed height exceeds 46.25 mm (1.82 in), install a valve spring shim of approximately 0.5 mm (0.02 in) thick. Do not shim the valve spring to obtain less than the specified height. Do not assemble the components without a spring shim on the cylinder head.
9. Install the remaining valves, springs, and other components.
10. Install sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the coolant sensor.
11. Install the coolant sensor into the left cylinder head. Tighten: Tighten the coolant sensor to 20 N.m (15 lb ft).
12. Install the coolant plug to the right cylinder head. Tighten: Tighten the coolant plug to 20 N.m (15 lb ft).
13. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the sides of the cylinder head expansion plugs (226).
14. Install the expansion plugs into the cylinder head. A properly installed plug should be installed 2.5 mm (0.1 in) below the end face of the head.

Oil Pump Disassemble

1. Remove the oil pump cover bolts.
2. Remove the oil pump cover.
3. Remove the drive gear.
4. Remove the driven gear.
5. Remove the pressure relief valve plug.
6. Remove the pressure relief valve spring.
7. Remove the pressure relief valve.
8. Inspect the oil pump components. Refer to «Oil Pump Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__oil-pump-cleaning-and-inspection) .

Oil Pump Cleaning and Inspection

1. Clean the parts in solvent.
2. Dry the parts with compressed air.
3. Inspect the oil pump housing and the cover for cracks, excessive wear, scoring, or casting imperfections.
4. Inspect the oil pump housing-to-engine block oil gallery surface for scratches or gouging.
5. Inspect the oil pump housing for damaged bolt hole threads.
6. Inspect the relief valve plug and plug bore for damaged threads.
7. Inspect the oil pump internal oil passages for restrictions.
8. Inspect the drive gear and driven gear for chipping, galling or wear. Minor burrs or imperfections on the gears may be removed with a fine oil stone.
9. Inspect the drive gear splines for excessive wear.
10. Inspect the pressure relief valve and bore for scoring or wear. The valve must move freely in the bore with no restrictions.
11. Inspect the oil pump screen for debris or restrictions.
12. Inspect the oil pump screen for broken or loose wire mesh.

Oil Pump Assemble

1. Install the driven gear into the pump housing. Install the driven gear with the orientation mark facing the pump cover.
2. Install the drive gear into the pump housing.
3. Install the oil pump cover.
4. Install the pump cover bolts. Tighten: Tighten the oil pump cover bolts to 12 N.m (106 lb in).
5. Install the regulator valve.
6. Install a NEW regulator valve spring.
7. Install the pressure relief valve plug. Tighten: Tighten the pressure relief valve plug to 12 N.m (106 lb in).
8. Inspect the oil pump for smooth operation by rotating the drive gear.

Engine Front Cover Cleaning and Inspection

1. Remove the crankshaft oil seal (140) from the front cover.
2. Clean the cover in solvent. Remove the sealant from the cover oil pan surface. Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Dry the cover with compressed air.
4. Inspect the gasket sealing surfaces for excessive scratches or gouging.
5. Inspect the cover-to-oil pan threaded bolt holes for damaged threads or debris.
6. Inspect the crankshaft oil seal mounting bore for damage.

Engine Rear Cover Cleaning and Inspection

1. Remove the crankshaft oil seal (141) from the rear cover.
2. Clean the cover in solvent. Remove the sealant from the cover oil pan surface. Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Dry the cover with compressed air.
4. Inspect the gasket sealing surfaces for excessive scratches or gouging.
5. Inspect the cover-to-oil pan threaded bolt holes for damaged threads or debris.
6. Inspect the crankshaft oil seal mounting bore for damage.

Engine Valley Cover Cleaning and Inspection

1. Remove the knock sensor oil seals (520) from the valley cover (555).
2. Remove the bolts (1), baffle cover (2), and baffle (3) from the valley cover (555).
3. Clean the valley cover components in solvent.
4. Dry the components with compressed air.
5. Inspect the gasket sealing surfaces for excessive scratches or gouging.
6. Inspect the oil seal bores for excessive scratching or gouging.
7. Inspect the ventilation tube for a loose fit or restrictions.
8. Install the baffle (3), baffle cover (2) and bolts (1) to the valley cover (555). Tighten: Tighten the baffle cover bolts to 5 N.m (44 lb in).

Valve Rocker Arm Cover Cleaning and Inspection

1. Remove the ignition coil and bracket assembly and bolts from the rocker cover, if required.
2. Remove the ignition coils and bolts from the bracket, if required.
3. Inspect the tube for a loose fit or damage.
4. Remove the oil fill cap and tube from the right cover, if required.
5. Remove the gaskets (504) from the covers.
6. Remove the cover mounting bolts, with grommets. Cover mounting bolts and grommets that are not damaged may be used again during assembly.
7. Clean the covers and coil brackets in solvent.
8. Dry the components with compressed air.
9. Inspect the ventilation system passages for restrictions.
10. Inspect the gasket grooves for damage.
11. Inspect the coil bracket threaded bolt holes for damaged threads or debris.
12. Inspect the coil mounting brackets for cracking, stripped bolt hole threads, or other damage.
13. Inspect the ignition coils for exterior damage and bent or broken connector pins.

Oil Pan Cleaning and Inspection

Scheme 146

1. Drill (2) out the oil pan gasket retaining rivets (1), if required.
2. Remove the gasket (426) from the oil pan.
3. Remove the oil temperature sensor (732).
4. Remove the oil pan cover (434), bolts (435) and gasket (433).
5. Remove the oil pan baffle and bolts.
6. Remove the oil pan drain plug.
7. Clean the oil pan in solvent. Be sure to thoroughly clean all of the oil passages and recesses of the pan.
8. Clean the oil pan gasket surfaces. Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Dry the oil pan with compressed air.
10. Inspect the oil pan for the following conditions: Gasket sealing surfaces for excessive scratches or gouging Oil pan drain plug and threaded drain hole for damaged threads The drain plug O-ring seal may be used again if it is not cut or damaged Oil filter sealing surface for scratches or gouging Oil passages for restrictions
11. Inspect the oil filter fitting (438) for a loose fit or damaged threads.
12. Inspect the oil filter bypass valve (436) for proper operation. Lightly push the bypass valve into the bore. The valve spring should seat the valve to the proper position.

Scheme 147

1. Remove the manifold absolute pressure (MAP) sensor from the rear of the intake manifold. The MAP sensor is to be installed upon completion of the cleaning and inspection procedures.
2. Inspect the sealing grommet on the MAP sensor. The grommet should not be torn or damaged.
3. Remove the throttle body.
4. Remove the throttle body gasket (509).
5. Discard the gasket.
6. Remove the fuel rail with injectors.
7. Remove and discard the intake manifold-to-cylinder head gaskets (514).
8. Clean the intake manifold in solvent. Clean the intake manifold gasket grooves. Clean the intake manifold vacuum passages at the rear of the intake.
9. Dry the intake manifold with compressed air.
10. Upon installation of the intake manifold, install NEW manifold-to-cylinder head gaskets.

1. Inspect the throttle body bolt inserts for looseness or damaged threads.
2. Inspect the fuel rail bolt inserts for looseness or damaged threads.
3. Inspect the intake manifold vacuum passages for debris or restrictions.
4. Inspect the MAP sensor housing. Inspect for damaged or broken vacuum fittings, damaged MAP sensor mounting bore, or broken MAP sensor retaining tab. Inspect the rear MAP sensor housing for looseness or poor sealing to the intake manifold. Repair or replace the components as necessary.
5. Inspect the composite intake manifold assembly for cracks or damage. Inspect the areas between the intake runners.
6. Inspect all the gasket sealing surfaces and grooves for cracking or damage.
7. Inspect the fuel injector bores for excessive scoring or damage.
8. Inspect the intake manifold cylinder head deck for warpage. Locate a straight edge across the intake manifold cylinder head deck surface. Insert a feeler gauge between the intake manifold and the straight edge. A intake manifold with warpage in excess of 0.5 mm (0.02 in), must be replaced.
9. Upon completion of inspection, install the MAP sensor to the manifold.

Exhaust Manifold Cleaning and Inspection

1. Clean the exhaust manifold (600) and heat shield (603) in solvent.
2. Dry the exhaust manifold with compressed air.
3. Inspect the exhaust manifold for the following conditions: Exhaust manifold-to-cylinder head gasket surface for excessive scratches or gouging. Take down studs for damaged threads Loose or damaged heat shield (603) or missing bolts (604)
4. Use a straight edge and a feeler gage to measure the exhaust manifold cylinder head deck for warpage. An exhaust manifold deck with warpage in excess of 0.25 mm (0.010 in), may cause an exhaust leak and may effect OBD II system performance. Exhaust manifolds not within specifications must be replaced.

Coolant Air Bleed Pipe Cleaning and Inspection

1. Remove the sealing gaskets from the pipe.
2. Remove the sealing gaskets from the covers.
3. Clean the pipe (307), hose (311), and covers in solvent.
4. Dry the pipe and covers with compressed air.
5. Inspect the pipe and covers for damage or restrictions.
6. Inspect the gasket and hose sealing surfaces for damage.
7. Inspect the hose (311) for restrictions, cracking or wear. The hose may be used again if it is not damaged.

Scheme 148

1. Remove the old gasket from the water pump sealing surfaces. Refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Clean all dirt and debris from the water pump housing.
3. Inspect the water pump for the following: Gasket sealing surfaces for excessive scratches or gouging Hose sealing surfaces for scratches or gouging Restrictions within the internal coolant passages Excessive side-to-side play in the pulley shaft A loose belt pulley or a pulley with excessive wear or scoring on the belt tracking area Leakage at the water outlet housing or rear cover gasket Leakage at the water pump vent hole A stain around the vent hole is acceptable. If leakage occurs, such as dripping, with the engine running and the cooling system pressurized, replace the water pump.

Thread Repair

Tools Required

1. J 42385-100 Head/Main Bolt Thread Repair Kit
2. J 42385-200 General Threads Kit
3. J 42385-300 Fixtures/Hardware Kit

Scheme 149

The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type insert (1). During the bushing installation process, the driver tool expands the bottom external threads of the insert into the base material (2). This action mechanically locks the insert in place. Also, when installed to the proper depth, the flange of the insert will be seated against the counterbore of the repaired hole.

1. Drill out the threads of the damaged hole (1). M6 inserts require a minimum drill depth of 15 mm (0.59 in). M8 inserts require a minimum drill depth of 20 mm (0.79 in). M10 inserts require a minimum drill depth of 23.5 mm (0.93 in).
2. Using compressed air, clean out any chips.
3. Counterbore the hole to the full depth permitted by the tool (1).
4. Using compressed air, clean out any chips.
5. Using a tap wrench (2), tap the threads of the drilled hole. M6 inserts require a minimum tap depth of 15 mm (0.59 in). M8 inserts require a minimum tap depth of 20 mm (0.79 in). M10 inserts require a minimum tap depth of 23.5 mm (0.93 in).
6. Using compressed air, clean out any chips.
7. Spray cleaner GM P/N 12346139 (Canadian P/N 10953463), GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the hole.
8. Using compressed air, clean any cutting oil and chips out of the hole.
9. Lubricate the threads of the installer tool (2) with the driver oil (1).
10. Install the insert (2) onto the driver tool (1).
11. Apply threadlock LOCTITE™ 277, J 42385-109 (1), or equivalent to the insert OD threads (2).
12. Install the insert (2) into the hole. Install the insert until the flange of the insert contacts the counterbored surface. Continue to rotate the installer tool (1) through the insert. The installer tool will tighten up before screwing completely through the insert. This is acceptable. You are forming the bottom threads of the insert and mechanically locking the insert to the base material threads.
13. Inspect the insert for proper installation into the hole. A properly installed insert (1) will be either flush or slightly below flush with the surface of the base material (2).

Cylinder Head Bolt Hole Thread Repair

1. The cylinder head bolt hole thread repair kit consists of the following items: The drill (1) The tap (2) The installer (3) The sleeve (4) The alignment pin (5) The bushing (6) The bolts (7) The fixture plate (8)
2. Measure the depth of the cylinder head bolt holes (1-10) to determine the proper drill and tap depths. Refer to «Thread Repair Specifications»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
3. Install the fixture plate (3), bolts (1), and bushing (2) onto the engine block deck. Position the fixture plate and bushing over the hole that is to be repaired (4).
4. Position the alignment pin (1) through the bushing and into the hole.
5. With the alignment pin in the desired hole, tighten the fixture retaining bolts (2).
6. Remove the alignment pin from the hole.
7. Install the sleeve (2) onto the drill (1), if required.
8. Drill out the threads of the damaged hole. Drill the hole until the stop collar of the drill bit or the sleeve contacts the bushing.
9. Using compressed air, clean out any chips.
10. Using a tap wrench, tap the threads of the drilled hole.
11. In order to tap the new threads to the proper depth, rotate the tap into the hole until the marks (1 or 4) on the tap align with the top of the drill bushing (3). For the deeper cylinder head bolt holes, rotate the tap until the upper mark on the tap (4) aligns with the top of the drill bushing. For the shallower cylinder head bolt holes, rotate the tap until the lower mark on the tap (1) aligns with the top of the drill bushing.
12. Remove the fixture plate (2), bushing (3), and bolts.
13. Using compressed air, clean out any chips.
14. Spray cleaner GM P/N 12346139 (Canadian P/N 10953463), GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the hole.
15. Using compressed air, clean any cutting oil and chips out of the hole.
16. Lubricate the threads of the installer tool (2) with the driver oil (1).
17. Install the insert (2) onto the driver tool (1).
18. Apply threadlock LOCTITE™ 277, J 42385-109 (1), or equivalent to the insert OD threads (2).
19. Install the insert and driver (1) into the hole. Rotate the driver tool until the mark on the tool aligns with the deck surface of the engine block. The installer tool will tighten up before screwing completely through the insert. This is acceptable. You are forming the bottom threads of the insert and mechanically locking the insert to the base material threads.

Main Cap Bolt Hole Thread Repair

1. The main cap bolt hole thread repair kit consists of the following items: The drill (1) The tap (2) The installer (3) The fixture plate (4) The long bolts (5) The short bolts (6) The alignment pin (7) The bushing (8)
2. Install the fixture plate, bolt, and bushing, onto the engine block. Position the fixture plate and bushing over the hole that is to be repaired.
3. Position the alignment pin in the desired hole and tighten the fixture retaining bolts.
4. Drill out the damaged hole. The outer bolt hole locations (11-20) have the shallower counterbores. Use sleeve J 42385-316 with the drill. Drill until the stop collar of the drill bit or the sleeve contacts the bushing.
5. Using compressed air, clean out any chips.
6. Using a tap wrench, tap the threads of the drilled hole. In order to tap the new threads to the proper depth, rotate the tap into the hole until the mark on the tap aligns with the top of the bushing. For the deeper main cap holes (1-10), rotate the tap until the upper mark (4) on the tap aligns with the top of the bushing (3). For the shallower main cap holes (11-20), rotate the tap until the lower mark (1) on the tap aligns with top of the bushing (3).
7. Using compressed air, clean out any chips.
8. Spray cleaner GM P/N 12346139 (Canadian P/N 10953463) or equivalent into the hole.
9. Using compressed air, clean any cutting oil and chips out of the hole.
10. Lubricate the threads of the installer tool (2) with the driver oil (1).
11. Install the insert (2) onto the driver tool (1).
12. Apply threadlock LOCTITE™ 277, J 42385-109 (1), or equivalent to the insert OD threads (2).
13. Install the insert and driver (1) through the fixture plate and bushing and into the hole. Rotate the driver tool until the mark on the tool (3) aligns with the top of the bushing (2). The installer tool will tighten up before screwing completely through the insert. This is acceptable. You are forming the bottom threads of the insert and mechanically locking the insert to the base material threads.

Service Prior to Assembly

1. Dirt or debris will cause premature wear of the rebuilt engine. Clean all the components. Refer to «Cleanliness and Care»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__cleanliness-and-care) .
2. Use the proper tools to measure components when checking for excessive wear. Components that are not within the manufacturers specifications must be repaired or replaced.
3. When the components are installed into an engine, return the components to their original location, position and direction. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
4. During assembly, lubricate all the moving parts with clean engine oil. This will provide initial lubrication when the engine is first started.

J 45299 Engine Preluber. See Special Tools and Equipment .

Scheme 150

Scheme 151

1. Remove the engine oil filter and fill with clean engine oil.
2. Install the oil filter. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
3. Locate the engine block left front oil gallery plug (116).
4. Install the M16 x 1.5 adapter P/N 509375.
5. Install the flexible hose to the adapter and open the valve.
6. Pump the handle on the J 45299 in order to flow a minimum of 1-1.9 liters (1-2 quarts) engine oil. Observe the flow of engine oil through the flexible hose and into the engine assembly.
7. Close the valve and remove the flexible hose and adapter from the engine.
8. Install the gallery plug to the engine. Tighten: Tighten the oil gallery plug to 60 N.m (44 lb ft).
9. Top-off the engine oil to the proper level.

J 41712 Oil Pressure Switch Socket

1. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block coolant heater sealing washer, if applicable.
2. Install the engine block coolant heater to the engine block, if applicable. Tighten: Tighten the block coolant heater to 40 N.m (30 lb ft).
3. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left side coolant drain hole plug sealing washer, if applicable.
4. Install the engine block left side coolant drain hole plug, if applicable. Tighten: Tighten the block left front coolant drain plug to 60 N.m (44 lb ft).
5. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block right side coolant drain hole plug sealing washer.
6. Install the engine block right side coolant drain hole plug. Tighten: Tighten the block right side coolant drain hole plug to 60 N.m (44 lb ft).
7. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left front oil gallery plug sealing washer.
8. Install the engine block left front oil gallery plug. Tighten: Tighten the block left front oil gallery plug to 60 N.m (44 lb ft).
9. Apply a 3.175 mm (0.125 in) bead of sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the engine block left rear oil gallery plug sealing washer.
10. Install the engine block left rear oil gallery plug. Tighten: Tighten the block left rear oil gallery plug to 60 N.m (44 lb ft).
11. Inspect the engine block rear oil gallery plug and O-ring seal. If the O-ring seal on the plug is not cut or damaged, the rear oil gallery plug may be used again.
12. Lubricate the O-ring seal with clean engine oil.
13. Install the block rear oil gallery plug into the oil gallery bore. A properly installed block plug will protrude 0.8-1.4 mm (0.0315-0.055 in) beyond the rear face of the block.
14. Apply sealant GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the sides of the NEW front oil gallery plug.
15. Install a NEW engine block front oil gallery plug, if required. Install the front oil gallery plug into the oil gallery bore 2.2-2.8 mm (0.0086-0.011 in) below flush. Do not install the plug more than the recommended depth.
16. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the oil pressure sensor.
17. Use the J 41712 or equivalent in order to install the oil pressure sensor, if required. Tighten: Tighten the oil pressure sensor to 20 N.m (15 lb ft).

J 45059 Angle Meter. See Special Tools and Equipment .

1. Install the crankshaft thrust bearings to the engine block and center bearing cap.
2. Install the remaining crankshaft bearings to the engine block and bearing caps.
3. Lubricate the bearing surfaces and crankshaft journals with clean engine oil.
4. Install the crankshaft.
5. Install the crankshaft bearing caps, with bearings, into the engine block.
6. Start the M10 bolts and studs.
7. Tap the bearing caps into place with a plastic-face hammer.
8. Install the NEW M8 bearing cap side bolts.
9. Tighten the bearing cap M10 bolts and studs. Tighten: Tighten the M10 bolts (1-10) a first pass in sequence to 20 N.m (15 lb ft).
10. Using a plastic faced hammer, tap the crankshaft rearward then forward to align the thrust bearings. Tighten: Tighten the M10 bolts (1-10) a final pass in sequence 80 degrees using the J 45059 . Tighten the M10 studs (11-20) a first pass in sequence to 20 N.m (15 lb ft). Tighten the M10 studs (11-20) a final pass in sequence 51 degrees using the J 45059 . Tighten the M8 bolts to 25 N.m (18 lb ft). Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap.
11. Install the CKP sensor. Inspect the CKP sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be used. Coat the O-ring seal with clean engine oil. Install the sensor. Align the notch in the sensor retaining bracket with the bolt hole in the block. Install the sensor bolt. Tighten: Tighten the CKP sensor bolt to 25 N.m (18 lb ft).
12. Measure the crankshaft end play. Thrust the crankshaft forward or rearward. Insert a feeler gage between the center crankshaft bearing and the bearing surface of the crankshaft and measure the bearing clearance. The proper crankshaft end play clearance is 0.04-0.2 mm (0.0015-0.0078 in). If the bearing clearance is not within specifications, inspect the thrust surfaces for nicks, gouges or raised metal. Minor imperfections may be removed with a fine stone.

Piston, Connecting Rod, and Bearing Installation

Tools Required

1. J 8037 Piston Ring Compressor
2. J 8087 Cylinder Bore Gage
3. J 41556 Connecting Rod Guide. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. J 45059 Angle Meter

Piston Selection

1. With a micrometer at a right angle, measure the piston outside diameter (OD). Measure the diameter 43 mm (1.69 in) from the top of the piston. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
2. Record the piston OD.
3. Adjust the micrometer to the recorded piston OD.
4. Insert the J 8087 into the micrometer and zero the gage dial.
5. Using the J 8087 , measure the cylinder bore inside diameter (ID). Measure at a point 64 mm (2.5 in) from the top of the cylinder.
6. Record the cylinder bore ID.
7. Subtract the piston OD from the cylinder bore ID to determine the piston-to-bore clearance. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .
8. If the proper clearance cannot be obtained, select another piston, pin, and connecting rod assembly and again measure the clearances. If the proper fit cannot be obtained, the cylinder bore may require honing for an oversize piston.

Piston, Pin, and Connecting Rod Installation

1. Lightly lubricate the following components with clean engine oil: Piston (1) Piston rings Cylinder bore Bearings (3) and bearing surfaces
2. Position the oil control ring end gaps a minimum of 25 mm (1.0 in) from each other.
3. Position the compression ring end gaps 180 degrees opposite each other.
4. Install the J 41556 to the connecting rod. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Install the J 8037 onto the piston and compress the piston rings.
6. Install the piston, pin, and connecting rod assembly into the cylinder bore. Hold the piston ring compressor firmly against the engine block. Using a wooden hammer handle, lightly tap the top of the piston until all the piston rings have entered the cylinder bore.
7. Use the J 41556 to guide the connecting rod onto the crankshaft journal. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
8. Remove the J 41556 from the connecting rod. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
9. Install the bearing cap, bearing half, and bolts. Tighten: Tighten the bolts a first pass to 20 N.m (15 lb ft). Tighten the bolts a final pass to 75 degrees using the J 45059 .
10. Measure the connecting rods for the proper side clearance. Refer to «Engine Mechanical Specifications (LS6)»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-mechanical-specifications-ls6) .

Scheme 152

1. Lubricate the camshaft journals and the bearings with clean engine oil.
2. Install 3 M8 - 1.25 x 100 mm (M8 - 1.25 x 4.0 in) bolts into the camshaft front bolt holes.
3. Using the bolts as a handle, carefully install the camshaft into the engine block.
4. Remove the 3 bolts from the front of the camshaft.
5. Install the camshaft retainer and the bolts. Tighten: Tighten the camshaft retainer bolts to 25 N.m (18 lb ft).
6. Inspect the camshaft sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be used again.
7. Lubricate the O-ring seal with clean engine oil.
8. Install the camshaft position (CMP) sensor and bolt. Tighten: Tighten the CMP sensor bolt to 25 N.m (18 lb ft).

J 41665 Crankshaft Balancer and Sprocket Installer. See Special Tools and Equipment .

1. Install the key into the crankshaft keyway, if previously removed.
2. Tap the key (122) into the keyway until both ends of the key bottom onto the crankshaft.
3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.
4. Use the J 41665 in order to install the crankshaft sprocket. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.
6. Install the chain dampener (232) and bolts (231). Tighten: Tighten the bolts to 35 N.m (26 lb ft).
7. With the chain dampener properly installed, the heads of the bolts (231) should install to flush or below the face of the dampener (232).
8. Install the camshaft sprocket and timing chain.
9. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.
10. Install the camshaft sprocket bolts. Tighten: Tighten the camshaft sprocket bolts to 35 N.m (26 lb ft).

Scheme 153

1. Align the splined surfaces of the crankshaft sprocket and the oil pump drive gear and install the oil pump.
2. Install the oil pump onto the crankshaft sprocket until the pump housing contacts the face of the engine block.
3. Install the oil pump bolts. Tighten: Tighten the oil pump bolts to 25 N.m (18 lb ft).
4. Install the crankshaft oil deflector.
5. Lubricate a NEW oil pump screen O-ring seal with clean engine oil.
6. Install the NEW O-ring seal onto the oil pump screen.
7. Install the oil pump screen.
8. Install the oil pump screen bolt and the deflector nuts. Tighten: Tighten the oil pump screen bolt to 12 N.m (106 lb in). Tighten the crankshaft oil deflector nuts to 25 N.m (18 lb ft).

Engine Rear Cover Installation

Tools Required

1. J 41480 Front and Rear Cover Alignment - Oil Pan Surface. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 41476 Front and Rear Cover Alignment Tool - Crankshaft Oil Seal Area. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Inspect the rear oil gallery plug for proper installation.
2. Install the rear cover gasket, rear cover and bolts.
3. Tighten the bolts finger tight. Do not overtighten.
4. Install the J 41480 and bolts. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Tighten: Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).
5. Rotate the crankshaft until 2 opposing flywheel bolt holes are parallel to the oil pan surface.
6. Install the J 41476 and bolts onto the rear of the crankshaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Tighten: Tighten the tool mounting bolts until snug. Do not overtighten. Tighten the J 41480 tool-to-rear cover bolts evenly to 12 N. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .m (106 lb in). Tighten the rear cover bolts to 25 N.m (18 lb ft).
7. Remove the tools.
8. Measure the rear cover-to-engine block oil pan surface for flatness. Place a straight edge onto the engine block and rear cover oil pan sealing surfaces. Avoid contact with the portion of the gasket that protrudes into the oil pan surface. Insert a feeler gage between the rear cover and the straight edge. The cover must be flush with the oil pan or no more than 0.5 mm (0.02 in) below flush.
9. If the rear cover-to-engine block oil pan surface alignment is not within specifications, repeat the cover alignment procedure.
10. If the correct rear cover-to-engine block alignment at the oil pan surface cannot be obtained, replace the rear cover.

J 41479 Crankshaft Rear Oil Seal Installer. See Special Tools and Equipment .

Scheme 154

1. Lubricate the outside diameter (OD) of the oil seal (141) with clean engine oil. DO NOT allow oil or other lubricants to contact the seal surface.
2. Lubricate the rear cover oil seal bore with clean engine oil. DO NOT allow oil or other lubricants to contact the crankshaft surface.
3. Install the J 41479 cone (2) and bolts onto the rear of the crankshaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Tighten the bolts until snug. Do not overtighten.
5. Install the rear oil seal onto the tapered cone (2) and push the seal to the rear cover bore.
6. Thread the J 41479 threaded rod into the tapered cone until the tool (1) contacts the oil seal. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
7. Align the oil seal onto the tool (1).
8. Rotate the handle of the tool (1) clockwise until the seal enters the rear cover and bottoms into the cover bore.
9. Remove the tool.

Engine Front Cover Installation

Tools Required

1. J 41480 Front and Rear Cover Alignment - Oil Pan Surface. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 41476 Front and Rear Cover Alignment Tool - Crankshaft Oil Seal Area. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

1. Install the front cover gasket, cover, and bolts onto the engine.
2. Tighten the cover bolts finger tight. Do not overtighten.
3. Install the J 41480 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Tighten: Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).
4. Install the J 41476 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Install the crankshaft balancer bolt. Tighten: Tighten the crankshaft balancer bolt by hand until snug. Do not overtighten. Tighten the J 41480 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Tighten the engine front cover bolts to 25 N.m (18 lb ft).
6. Remove the tools.
7. Measure the oil pan surface flatness, front cover-to-engine block. Place a straight edge across the engine block and front cover oil pan sealing surfaces. Avoid contact with the portion of the gasket that protrudes into the oil pan surface. Insert a feeler gage between the front cover and the straight edge tool. The cover must be flush with the oil pan surface or no more than 0.5 mm (0.02 in) below flush.
8. If the front cover-to-engine block oil pan surface alignment is not within specifications, repeat the cover alignment procedure.
9. If the correct front cover-to-engine block alignment cannot be obtained, replace the front cover.

J 41478 Crankshaft Front Oil Seal Installer. See Special Tools and Equipment .

Scheme 155

1. Lubricate the outer edge of the oil seal (140) with clean engine oil.
2. Lubricate the front cover oil seal bore with clean engine oil.
3. Install the crankshaft front oil seal onto the J 41478 guide. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Install the J 41478 threaded rod, with nut, washer, guide, and oil seal, into the end of the crankshaft. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Use the J 41478 in order to install the oil seal into the cover bore. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Use a wrench and hold the hex on the installer bolt. Use a second wrench and rotate the installer nut clockwise until the seal bottoms in the cover bore. Remove the tool. Inspect the oil seal for proper installation. The oil seal should be installed evenly and completely into the front cover bore.

Oil Pan Installation

1. Install the oil pan baffle and bolts. Tighten: Tighten the oil pan baffle bolts to 12 N.m (106 lb in).
2. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent, 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrude into the oil pan surface. Refer to «Sealers, Adhesives, and Lubricants»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__sealers-adhesives-and-lubricants) .
3. Apply a 5 mm (0.2 in) bead of sealant GM P/N 12378190 or equivalent, 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrude into the oil pan surface. Refer to «Sealers, Adhesives, and Lubricants»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__sealers-adhesives-and-lubricants) .
4. Preassemble the oil pan gasket to the pan. Install the gasket onto the oil pan. Install the oil pan bolts to the pan and through the gasket.
5. Install the oil pan, gasket and bolts to the engine block.
6. Tighten bolts finger tight. Do not overtighten.
7. Place a straight edge across the rear of the engine block and the rear of the oil pan at the transmission housing mounting surfaces.
8. Align the oil pan until the rear of engine block and rear of oil pan are flush or even. Tighten: Tighten the oil pan-to-block and oil pan-to-front cover bolts to 25 N.m (18 lb ft). Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
9. Measure the oil pan-to-engine block alignment. Place a straight edge across the rear of the engine block and rear of oil pan at the transmission housing mounting surfaces. IMPORTANT: The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing mounting surfaces. Insert a feeler gage between the straight edge and the oil pan transmission housing mounting surface and check to make sure that there is no more than a 0.25 mm (0.01 in) gap between the pan and straight edge. If the oil pan alignment is not within specifications, remove the oil pan and repeat the above procedure.

Oil Filter, Adapter, Pan Cover Installation

1. Install the gasket (433), cover (434), and bolts (435). Tighten: Tighten the cover bolts to 12 N.m (106 lb in).
2. Install the oil temperature sensor. Tighten: Tighten the sensor to 20 N.m (15 lb ft).
3. Install a new oil filter bypass valve (436) into the oil pan, if required.
4. Install the oil filter fitting (438). Tighten: Tighten the oil filter fitting to 55 N.m (40 lb ft).
5. Install the oil filter. Tighten: Tighten the oil filter to 30 N.m (22 lb ft).
6. Install the oil pan drain plug. Tighten: Tighten the oil pan drain plug to 25 N.m (18 lb ft).

Valve Lifter Installation

1. Lubricate the valve lifters and engine block valve lifter bores with clean engine oil.
2. Insert the valve lifters into the lifter guides. Align the flat area on the top of the lifter with the flat area in the lifter guide bore. Push the lifter completely into the guide bore.
3. Install the valve lifters and guide assembly to the engine block.
4. Install the valve lifter guide bolt (211). Tighten: Tighten the valve lifter guide bolt to 12 N.m (106 lb in).

Cylinder Head Installation - Left

Tools Required

1. J 42385-100 Head/Main Bolt Thread Repair Kit
2. J 45059 Angle Meter

1. Clean the engine block cylinder head bolt holes, if required. Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.
2. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the hole.
3. Clean the cylinder head bolt holes with compressed air.
4. Measure the depth of the cylinder head bolt holes (1-10) and select the correct length bolts as required.
5. Check the cylinder head locating pins for proper installation.
6. Install the NEW left cylinder head gasket onto the locating pins.
7. Inspect the gasket for proper installation.
8. Install the cylinder head onto the locating pins and the gasket.
9. Install the NEW cylinder head bolts.
10. Tighten the first design cylinder head bolts. Tighten: Tighten the first design M11 cylinder head bolts a first pass in sequence to 30 N.m (22 lb ft). Tighten the first design M11 cylinder head bolts a second pass in sequence to 90 degrees using the J 45059 . Tighten the first design M11 cylinder head bolts (1,2,3,4,5,6,7,8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50 degrees a final pass in sequence to using the J 45059 . Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
11. Tighten the second design engine block cylinder head bolts. Tighten: Tighten the second design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb ft). Tighten the second design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 . Tighten the second design M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 . Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.

Cylinder Head Installation - Right

Tools Required

1. J 42385-100 Head/Main Bolt Thread Repair Kit
2. J 45059 Angle Meter

1. Clean the engine block cylinder head bolt holes, if required. Thread repair tool J 42385-107 may be used to clean the threads of old threadlocking material.
2. Spray cleaner GM P/N 12346139, GM P/N 12377981 (Canadian P/N 10953463) or equivalent into the hole.
3. Clean the cylinder head bolt holes with compressed air.
4. Measure the depth of the cylinder head bolt holes (1-10) and select the correct length bolts as required.
5. Check the cylinder head locating pins for proper installation.
6. Install the NEW right cylinder head gasket onto the locating pins.
7. Inspect the gasket for proper installation.
8. Install the cylinder head onto the locating pins and the gasket.
9. Install the NEW cylinder head bolts.
10. Tighten the first design cylinder head bolts. Tighten: Tighten the first design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb ft). Tighten the first design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 . Tighten the first design M11 cylinder head bolts (1,2,3,4,5,6,7,8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50 degrees a final pass in sequence using the J 45059 . Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward, tightening all of the bolts.
11. Tighten the second design engine block cylinder head bolts. Tighten: Tighten the second design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb ft). Tighten the second design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 . Tighten the second design M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 . Tighten the M8 cylinder head bolts (11,12,13,14,15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward, tightening all of the bolts.

Valve Rocker Arm and Push Rod Installation

1. Lubricate the valve rocker arms and pushrods with clean engine oil.
2. Lubricate the flange of the valve rocker arm bolts with clean engine oil. Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
3. Install the valve rocker arm pivot support.
4. Install the pushrods.
5. Install the rocker arms and bolts.
6. Rotate the crankshaft until number one piston is at top dead center of compression stroke. In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position. If viewing from the rear of the engine, the additional crankshaft pilot hole, non-threaded, will be in the 10:30 position. The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5 and 7 are left bank. Cylinders 2, 4, 6, and 8 are right bank.
7. With the engine in the number one firing position, tighten the following valve rocker arm bolts: Tighten: Tighten exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N.m (22 lb ft). Tighten intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N.m (22 lb ft).
8. Rotate the crankshaft 360 degrees.
9. Tighten the following valve rocker arm bolts: Tighten: Tighten exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N.m (22 lb ft). Tighten intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N.m (22 lb ft).

Valve Rocker Arm Cover Installation - Left

1. Install a NEW cover gasket (504) into the valve rocker arm cover.
2. Install the valve rocker arm cover onto the cylinder head.
3. Install the cover bolts with grommets. Tighten: Tighten the valve rocker arm cover bolts to 12 N.m (106 lb in).
4. Install the ignition coils, wire harness, and bolts onto the mounting bracket. Tighten: Tighten the ignition coil bolts to 12 N.m (106 lb in).
5. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the bracket bolts.
6. Install the ignition coils and bracket assembly and bolts onto the rocker cover. Tighten: Tighten the ignition coil bracket bolts to 12 N.m (106 lb in).
7. Install the crankcase ventilation hose.

Valve Rocker Arm Cover Installation - Right

1. Lubricate the O-ring seal of the NEW oil fill tube with clean engine oil.
2. Insert the NEW oil fill tube into the rocker arm cover and rotate the tube clockwise until locked in the proper position.
3. Install the oil fill cap into the tube and rotate clockwise until locked in the proper position.
4. Install a NEW gasket (504) into the valve rocker arm cover.
5. Install the valve rocker arm cover onto the cylinder head.
6. Install the cover bolts with grommets. Tighten: Tighten the valve rocker arm cover bolts to 12 N.m (106 lb in).
7. Install the ignition coils, wire harness, and bolts onto the mounting bracket. Tighten: Tighten the ignition coil bolts to 12 N.m (106 lb in).
8. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the bracket bolts.
9. Install the ignition coils and bracket assembly and bolts to the rocker cover. Tighten: Tighten the ignition coil bracket bolts to 12 N.m (106 lb in).
10. Install the crankcase ventilation hoses to the cover.

Engine Valley Cover Installation

1. Install NEW knock sensor oil seals (520) into the valley cover (555). Lubricate the seal surfaces with clean engine oil.
2. Install the valley cover and NEW gasket.
3. Install the valley cover bolts. Tighten: Tighten the valley cover bolts to 25 N.m (18 lb ft).
4. Install the knock sensors. Tighten: Tighten the knock sensors to 20 N.m (15 lb ft).
5. Install the knock sensor wire harness.

Coolant Air Bleed Pipe Installation

1. Install the gaskets onto the engine coolant air bleed pipe and covers.
2. Install the pipe (307) and gaskets (308) onto the cylinder heads.
3. Install the pipe studs (309). Install the two pipe studs to the front of the engine. Tighten: Tighten the pipe studs to 12 N.m (106 lb in).
4. Install the covers (313), gaskets (308), and bolts (312) onto the rear of the engine. Tighten: Tighten the cover bolts to 12 N.m (106 lb in).
5. Install the hose (311) and clamps (310) onto the pipe (307).

Intake Manifold Installation

1. Install NEW intake manifold-to-cylinder head gaskets (514).
2. Install the intake manifold to the engine.
3. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the intake manifold bolts (713). Refer to «Sealers, Adhesives, and Lubricants»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__sealers-adhesives-and-lubricants) .
4. Install the fuel rail stop bracket (712).
5. Install the manifold bolts. Tighten: Tighten intake manifold bolts a first pass in sequence to 5 N.m (44 lb in). Tighten intake manifold bolts a final pass in sequence to 10 N.m (89 lb in).
6. Install the knock sensor wire harness connector (1) onto the fuel rail stop bracket (712).
7. Note the location of the fuel rail ground strap (550) on the intake manifold. The fuel rail ground strap must be installed during assembly.
8. Install the manifold absolute pressure (MAP) sensor, if previously removed.
9. Install the positive crankcase ventilation (PCV) pipe - dirty air (716) to the valley cover and intake manifold.

Fuel Rail and Injectors Installation

1. Lubricate the NEW fuel injector O-ring seals with clean engine oil.
2. Install the O-ring seals onto the fuel injectors.
3. Note the location of the fuel rail ground strap (550) on the intake manifold. The fuel rail ground strap must be installed during assembly.
4. Install the fuel rail, with fuel injectors, into the intake manifold. Press evenly on both sides of the fuel rail until all of the injectors are seated in their bores.
5. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the fuel rail bolts.
6. Install the fuel rail bolts. Tighten: Tighten the fuel rail bolts to 10 N.m (89 lb in).

Throttle Body Installation

1. Install the throttle body gasket (509) to the intake manifold.
2. Install the throttle body and bolts. Tighten: Tighten the throttle body bolts to 12 N.m (106 lb in).
3. Install the engine coolant air bleed hose and clamp.

Water Pump Installation

1. Install the water pump and NEW gaskets.
2. Install the water pump bolts. Tighten: Tighten the water pump bolts a first pass to 15 N.m (11 lb ft). Tighten the water pump bolts a final pass to 30 N.m (22 lb ft).

Exhaust Manifold Installation - Left

1. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts. Refer to «Sealers, Adhesives, and Lubricants»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__sealers-adhesives-and-lubricants) .
2. Install the exhaust manifold and NEW exhaust manifold gasket.
3. Install the exhaust manifold bolts. Tighten: Tighten the exhaust manifold bolts a first pass to 15 N.m (12 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts. Tighten the exhaust manifold bolts a final pass to 25 N.m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
4. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the rear of the left cylinder head.
5. Install the heat shield (603) and bolts (604). Tighten: Tighten the heat shield bolts to 9 N.m (80 lb in).

Exhaust Manifold Installation - Right

Scheme 156

1. Apply a 5 mm (0.20 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the threads of the exhaust manifold bolts. Refer to «Sealers, Adhesives, and Lubricants»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__sealers-adhesives-and-lubricants) .
2. Install the exhaust manifold gasket and exhaust manifold.
3. Install the exhaust manifold bolts. Tighten: Tighten the exhaust manifold bolts first pass to 15 N.m (12 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts. Tighten the exhaust manifold bolts final pass to 25 N.m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
4. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the front of the right cylinder head.
5. Install the heat shield (603) and bolts (604). Tighten: Tighten the heat shield bolts to 9 N.m (80 lb in).

Scheme 157

1. Inspect the O-ring seal for cuts or damage. If the oil level indicator tube O-ring seal is not cut or damaged, it may be reused.
2. Lubricate the O-ring seal with clean engine oil.
3. Install the O-ring seal onto the oil level indicator tube.
4. Install the oil level indicator tube into the oil pan and rotate into the proper position.
5. Install the tube bolt to the right cylinder head. Tighten: Tighten the oil level indicator tube bolt to 50 N.m (37 lb ft).
6. Install the oil level indicator into the tube.

J 38836 Pilot Bushing Installer/Clutch. See Special Tools and Equipment .

Scheme 158

1. Install a 5/8 inch washer (1) onto the J 38836 or equivalent. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . The washer serves as a stop against the crankshaft face and will assist in installing the bearing to the proper depth.
2. Install the new pilot bearing (2) onto the tool.
3. Install the new pilot bearing into the crankshaft using the J 38836 . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Inspect the clutch pilot bearing for proper installation. A properly installed clutch pilot bearing will be installed until flush to the rear face of the crankshaft.

Engine Flywheel Installation

1. Install the manual transmission engine flywheel to the crankshaft. Align the mark or scribe on the crankshaft with the mark or scribe on the flywheel.
2. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the flywheel bolts.
3. Install the engine flywheel bolts. Tighten: Tighten the engine flywheel bolts first pass in sequence to 20 N.m (15 lb ft). Tighten the engine flywheel bolts second pass in sequence to 50 N.m (37 lb ft). Tighten the engine flywheel bolts final pass in sequence to 100 N.m (74 lb ft).

Crankshaft Balancer Installation

Tools Required

1. J 41665 Crankshaft Balancer and Sprocket Installer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. J 42386-A Flywheel Holding Tool
3. J 45059 Angle Meter

1. Install the J 42386-A and bolts. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten: Tighten the J 42386-A bolts to 50 N.m (37 lb ft).
2. Using the old balancer as a reference, mark or scribe the NEW balancer in the same location, if required. Install balance weights into the NEW balancer, if required. Refer to «Engine Balancing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__engine-balancing) and «Crankshaft Balancer Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-balancer-cleaning-and-inspection) .
3. Install the balancer onto the end of the crankshaft.
4. Use the J 41665 in order to install the balancer. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) . Assemble the threaded rod, nut, washer and installer. Insert the smaller end of the installer into the front of the balancer. Use a wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto crankshaft. Remove the tool and reverse the installation tool. Position the larger end of the installer against the front of the balancer. Use a wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed onto the crankshaft. Remove the balancer installation tool.
5. Install the used crankshaft balancer bolt. Tighten: Tighten the crankshaft balancer bolt to 330 N.m (240 lb ft).
6. Remove the used crankshaft balancer bolt.
7. Measure for a correctly installed balancer. If the balancer is not installed to the proper dimensions, install the J 41665 and repeat the installation procedure. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
8. Install the NEW crankshaft balancer bolt. Tighten: Tighten the crankshaft balancer bolt a first pass to 50 N.m (37 lb ft). Tighten the crankshaft balancer bolt a second pass to 140 degrees using the J 45059 .
9. Remove the J 42386-A .

Crankcase Ventilation System Description

A crankcase ventilation system is used to consume crankcase vapors during the combustion process instead of venting them to the atmosphere. Fresh air is supplied to the crankcase. The fresh air hose is connected to the throttle body and the right side valve rocker cover. The crankcase mixes the fresh air with the blow-by gases and passes the mixture through a fixed non-serviceable orifice. The orifice is integrated into the engine valley cover. The dirty air hose connects to the intake manifold, for vacuum, and the engine valley cover. If abnormal operating conditions arise, the system is designed to allow excessive amounts of blow-by gases to back flow through the crankcase ventilation fresh air tube in order to be consumed by normal combustion.

Drive Belt System Description

The drive belt system consists of the following components

1. The drive belt
2. The drive belt tensioner
3. The drive belt idler pulley
4. The crankshaft balancer pulley
5. The accessory drive component mounting brackets
6. The accessory drive components The power steering pump, if belt driven The generator The A/C compressor, if equipped The engine cooling fan, if belt driven The water pump, if belt driven The vacuum pump, if equipped The air compressor, if equipped

The drive belt system may use 1 belt or 2 belts. The drive belt is thin so that it can bend backwards and has several ribs to match the grooves in the pulleys. There also may be a V-belt style belt used to drive certain accessory drive components. The drive belts are made of different types of rubbers - chloroprene or EPDM - and have different layers or plys containing either fiber cloth or cords for reinforcement.

Both sides of the drive belt may be used to drive the different accessory drive components. When the back side of the drive belt is used to drive a pulley, the pulley is smooth.

The drive belt is pulled by the crankshaft balancer pulley across the accessory drive component pulleys. The spring loaded drive belt tensioner keeps constant tension on the drive belt to prevent the drive belt from slipping. The drive belt tensioner arm will move when loads are applied to the drive belt by the accessory drive components and the crankshaft.

The drive belt system may have an idler pulley, which is used to add wrap to the adjacent pulleys. Some systems use an idler pulley in place of an accessory drive component when the vehicle is not equipped with the accessory.

Scheme 159

The 5.7 Liter V8 engine is identified as RPO-LS6 and VIN-S.

Camshaft and Drive System

A billet steel one piece camshaft is supported by five bearings pressed into the engine block. The camshaft has a machined camshaft sensor reluctor ring incorporated between the fourth and fifth bearing journals. The camshaft timing sprocket is mounted to the front of the camshaft and is driven by the crankshaft sprocket through the camshaft timing chain. The crankshaft sprocket is splined and drives the oil pump driven gear. A retaining plate mounted to the front of the engine block maintains camshaft location.

Crankshaft

The crankshaft is cast nodular iron. The crankshaft is supported by five crankshaft bearings. The bearings are retained by crankshaft bearing caps which are machined with the engine block for the proper alignment and clearance. The crankshaft journals are undercut and rolled. The center main journal is the thrust journal. A crankshaft position reluctor ring is mounted at the rear of the crankshaft. The reluctor ring is not serviceable separately.

Cylinder Heads

The cylinder head assemblies are cast aluminum and have pressed in place powdered metal valve guides and valve seats. Passages for the engine coolant air bleed system are at the front of each cylinder head. There are no exhaust gas passages within the cylinder head. Valve rocker arm covers are retained to the cylinder heads by four center mounted rocker arm cover bolts.

Engine Block

The engine block is a cam-in-block deep skirt 90 degree V configuration with five crankshaft bearing caps. The engine block is aluminum with cast in place iron cylinder bore liners. The five crankshaft bearing caps each have four vertical M10 and two horizontal M8 mounting bolts. The camshaft is supported by five camshaft bearings pressed into the block. First design engine blocks have different drill and tap depths using both medium length 100 mm (3.94 in) and long 155 mm (6.1 in) M11 cylinder head bolts. Second design engine blocks use only the medium length 100 mm (3.94 in) bolt with a common drill and tap depth.

Exhaust Manifolds

The exhaust manifolds are a one piece cast iron design. The exhaust manifolds direct exhaust gasses from the combustion chambers to the exhaust system. Each manifold has an externally mounted stamped steel heat shield that is retained by bolts.

Intake Manifold

The IAFM or integrated air fuel module is a one piece composite design that incorporates metal and/or brass threaded inserts for mounting the fuel rail and throttle body. The intake manifold is sealed to the cylinder heads by 8 separate non-reusable silicone sealing gaskets which press into the grooves of the intake housing. The drive by wire throttle body assembly bolts to the front of the intake manifold. The throttle body is sealed to the intake manifold by a one piece push in place silicone gasket. The fuel rail assembly with eight separate fuel injectors is retained to the intake by four bolts. The injectors are seated in their individual manifold bores with O-ring seals to provide sealing. A fuel rail stop bracket is retained at the rear of the left fuel rail by the intake manifold mounting bolts. A snap fit manifold absolute pressure (MAP) sensor housing is mounted at the rear of the manifold and sealed by an O-ring seal. The MAP sensor is installed and retained to the MAP sensor housing. There are no coolant passages within the intake manifold.

Oil Pan

The structural oil pan is cast aluminum. Incorporated into the design are the oil filter mounting boss, drain plug opening and oil pan baffle. The oil pan cover, oil temperature sensor, and oil level sensor mount to the side of the oil pan. The alignment of the structural oil pan to the rear of the engine block and transmission bell housing is critical.

Piston and Connecting Rod Assemblies

The pistons are cast aluminum. The pistons use 2 compression rings and a 3-piece oil control ring assembly. The piston is a low friction, lightweight design with a barrel shaped skirt. All applications use pistons with graphite-coated skirts. The piston pins are chromium steel. First design applications use a piston pin that is floating fit to the piston and press fit to the connecting rod. Second design applications use a pin that is full-floating to both the piston and connecting rod. The connecting rods are powdered metal. The connecting rods are fractured at the connecting rod journal and then machined for the proper clearance. The first design piston, pin, and connecting rod are to be serviced as an assembly.

Valve Rocker Arm Cover Assemblies

The valve rocker arm covers are cast aluminum and use a pre-molded silicone gasket for sealing. Mounted to each rocker cover is an ignition coil and bracket assembly. The oil fill tube is incorporated into the right cover. The rocker arm covers are retained to the cylinder heads by four center mounted rocker cover bolts.

Valve Train

Motion is transmitted from the camshaft through the hydraulic roller valve lifters and tubular pushrods to the roller type rocker arms. The nylon valve lifter guides position and retain the valve lifters. The valve rocker arms for each bank of cylinders are mounted on pedestals, pivot supports. Each rocker arm is retained on the pivot support and cylinder head by a bolt. Valve lash is net build.

New Product Information

The purpose of New Product Information is to highlight or indicate important product changes from the previous model year.

Changes may include one or more of the following items

1. Torque values and/or fastener tightening strategies
2. Changed engine specifications
3. New sealants and/or adhesives
4. Disassembly and assembly procedure revisions
5. Engine mechanical diagnostic procedure revisions
6. New special tools required
7. A component comparison from the previous year

Torque Values and/or Fastener Tightening Strategies

1. All fasteners and threaded holes on the engine utilize metric threads.
2. Cylinder head, connecting rod, crankshaft balancer, and main bearing cap bolts now apply a torque angle tightening strategy.
3. Certain fasteners should not be used again. Bolts, studs, or other fasteners that must be replaced will be called out in the specific service procedure.
4. First design engine blocks cylinder head bolts have different torque/angle specifications using both medium length 100 mm (3.94 in) and long 155 mm (6.1 in) M11 cylinder head bolts. Second design engine blocks use only the medium length 100 mm (3.94 in) bolt with a common torque/angle specification.
5. Refer to «Fastener Tightening Specifications»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__fastener-tightening-specifications) and «Thread Repair Specifications»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .

Changed Engine Specifications

Metric and English values are given for all specifications.

Disassembly and Assembly Procedure Revisions

1. The piston, pin, and connecting rod are to be serviced as an assembly.
2. Newer design pistons have a graphite coated piston skirt. The coated skirt outside diameter (OD) may be slightly larger than the cylinder bore inside diameter (ID) and the piston assembly may have a slight interference fit to the cylinder bore during initial installation.

Engine Mechanical Diagnostic Procedure Revisions

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system problem. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Diagnostic Starting Point - Engine Mechanical .

New Special Tools Required

1. A variety of new tools have been developed to assist in engine disassembly, assembly and on-vehicle service. Refer to «Special Tools»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__special-tools) .
2. J 43690 and J 43690-100 have been developed to measure connecting rod bearing clearances. Refer to «Crankshaft and Bearings Cleaning and Inspection»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__crankshaft-and-bearings-cleaning-and-inspection) .
3. A cylinder leak down test, using J 35667-A , has been developed. Refer to «Cylinder Leakage Test»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. J 45299 has been developed to prelube new or remanufactured engines/bearings prior to engine installation. Refer to «Engine Prelubing»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
5. Angle meter J 45059 has been developed to provide technicians with a convenient method to tighten bolts that require torque angle tightening strategy.

A Component Comparison from the Previous Year

1. First design applications use a piston pin that is floating fit to the piston and press-fit to the connecting rod. Second design applications use a piston pin that is full-floating to both the piston and the connecting rod.
2. The first design press-fit piston, pin and connecting rod are to be serviced as an assembly.

Scheme 160

Engine lubrication is supplied by a gerotor type oil pump assembly. The pump is mounted on the front of the engine block and driven directly by the crankshaft sprocket. The pump gears rotate and draw oil from the oil pan sump through a pick-up screen and pipe. The oil is pressurized as it passes through the pump and is sent through the engine block oil galleries. Contained within the oil pump assembly is a pressure relief valve that maintains oil pressure within a specified range. Pressurized oil is directed through the lower gallery to the full flow oil filter where harmful contaminants are removed. A bypass valve is incorporated into the oil pan which will permit oil flow in the event the filter becomes restricted. At the rear of the block, oil is then directed to the upper main oil galleries which are drilled just above the camshaft assembly. From there oil is then directed to the crankshaft and camshaft bearings. Oil that has entered the upper main oil galleries also pressurizes the valve lifter assemblies and is then pumped through the pushrods to lubricate the valve rocker arms and valve stems. Oil returning to the pan is directed by the crankshaft oil deflector. Oil pressure, temperature, and crankcase level are each monitored by individual sensors.

Cleanliness and Care

1. Throughout this section, it should be understood that proper cleaning and protection of machined surfaces and friction areas is part of the repair procedure. This is considered standard shop practice even if not specifically stated.
2. When any internal engine parts are serviced, care and cleanliness is important.
3. When components are removed for service, they should be marked, organized or retained in a specific order for reassembly. Refer to «Separating Parts»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6__separating-parts) .
4. At the time of installation, components should be installed in the same location and with the same mating surface as when removed.
5. An automobile engine is a combination of many machined, honed, polished and lapped surfaces with tolerances that are measured in millimeters or thousandths of an inch. These surfaces should be covered or protected to avoid component damage.
6. A liberal coating of clean engine oil should be applied to friction areas during assembly.
7. Proper lubrication will protect and lubricate friction surfaces during initial operation.

Separating Parts

Separate, mark, or organize the following components

1. Piston and the piston pin
2. Piston to the specific cylinder bore
3. Piston rings to the piston
4. Connecting rod to the crankshaft journal
5. Connecting rod to the bearing cap A paint stick or etching/engraving type tool are recommended. Stamping the connecting rod or cap near the bearing bore may affect component geometry.
6. Crankshaft main and connecting rod bearings
7. Camshaft and valve lifters
8. Valve lifters, lifter guides, pushrods and rocker arm assemblies
9. Valve to the valve guide
10. Valve spring and shim to the cylinder head location
11. Engine block main bearing cap location and direction
12. Oil pump drive and driven gears

J 28410 Gasket Remover. See Special Tools and Equipment .

Gasket Use and Applying Sealants

1. Do not use any gasket again unless specified.
2. Gaskets that can be used again are identified in the service procedure.
3. Do not apply sealant to any gasket or sealing surface unless called out in the service information.

Separating Components

1. Use a rubber mallet to separate components.
2. Bump the part sideways to loosen the components.
3. Bumping should be done at bends or reinforced areas to prevent distortion of parts.

Cleaning Gasket Surfaces

1. Remove all gasket and sealing material from the part using the J 28410 or equivalent. See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
2. Care must be used to avoid gouging or scraping the sealing surfaces.
3. Do not use any other method or technique to remove sealant or gasket material from a part.
4. Do not use abrasive pads, sand paper, or power tools to clean the gasket surfaces. These methods of cleaning can cause damage to the component sealing surfaces. Abrasive pads also produce a fine grit that the oil filter cannot remove from the oil. This grit is abrasive and has been known to cause internal engine damage.

Assembling Components

1. When assembling components, use only the sealant specified or equivalent in the service procedure.
2. Sealing surfaces should be clean and free of debris or oil.
3. Specific components such as crankshaft oil seals or valve stem oil seals may require lubrication during assembly.
4. Components requiring lubrication will be identified in the service procedure.
5. When applying sealant to a component, apply the amount specified in the service procedure.
6. Do not allow the sealant to enter into any blind threaded holes, as it may prevent the bolt from clamping properly or cause component damage when tightened.
7. Tighten bolts to specifications. Do not overtighten.

Pipe Joint Compound

1. Pipe joint compound is a pliable sealer that does not completely harden. This type sealer is used where 2 non-rigid parts, such as the oil pan and the engine block, are assembled together.
2. Do not use pipe joint compound in areas where extreme temperatures are expected. These areas include exhaust manifold, head gasket, or other surfaces where gasket eliminator is specified.
3. Follow all safety recommendations and directions that are on the container. To remove the sealant or the gasket material, refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Apply the pipe joint compound to a clean surface. Use a bead size or quantity as specified in the procedure. Run the bead to the inside of any bolt holes.
5. Apply a continuous bead of pipe joint compound to one sealing surface. Sealing surfaces to be resealed must be clean and dry.
6. Tighten the bolts to specifications. Do not overtighten.

RTV Sealer

1. RTV sealant hardens when exposed to air. This type sealer is used where 2 non-rigid parts, such as the intake manifold and the engine block, are assembled together.
2. Do not use RTV sealant in areas where extreme temperatures are expected. These areas include exhaust manifold, head gasket, or other surfaces where a gasket eliminator is specified.
3. Follow all safety recommendations and directions that are on the container. To remove the sealant or the gasket material, refer to «Replacing Engine Gaskets»(/cadillac/cts/i-2002-2007/remont/mechanical/#engine-mechanical-57l-ls6) .
4. Apply RTV to a clean surface. Use a bead size as specified in the procedure. Run the bead to the inside of any bolt holes.
5. Assemble components while RTV is still wet, within 3 minutes. Do not wait for RTV to skin over.
6. Tighten bolts to specifications. Do not overtighten.