Engine Mechanical - 3.6l - Repair Instructions - off Vehicle Buick LaCrosse II

Drive Belt Tensioner Removal

1. Remove the drive belt tensioner bracket bolts.
2. Remove the drive belt tensioner assembly.

Oil Level Indicator and Tube Removal (LF1, LFW or LFX)

1. Remove the oil level indicator tube bracket bolt (1).
2. Remove the oil level indicator and tube (2) by sliding the tube out from the lower crankcase hole.
3. Remove and discard the O-ring from the oil level indicator tube if damaged.

Oil Filter Adapter Removal

1. Remove and properly dispose of the oil filter.
2. Remove the oil filter adapter bolts from the engine block.
3. Remove the oil filter adapter.
4. Remove and discard the oil filter adapter gasket.

Intake Manifold Removal (LF1, LFW or LFX)

1. Disconnect and remove the positive crankcase ventilation (PCV) tube (1) from the intake manifold and right camshaft cover.
2. Remove the evaporative (EVAP) hose from the intake manifold and EVAP solenoid.
3. Remove the fuel pump cover bolt (1).
4. Remove the fuel pump cover (2).
5. Remove the intake manifold bolts (1).
6. Remove the intake manifold assembly (2).
7. Remove and discard the intake manifold gasket (1).

Water Outlet Removal

1. Remove the water outlet bolts (4).
2. Remove the water outlet (1).
3. Remove the water outlet seals (2) and (3).

Engine Coolant Thermostat Housing Removal

1. Remove the thermostat housing bolts.
2. Remove the thermostat housing.
3. Remove and discard the thermostat housing gasket.

Crankshaft Balancer Removal

Special Tools

1. EN 38416-2 Crankshaft Button
2. EN 41816 Crankshaft Balancer Remover
3. EN 46106 Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools .

1. Install the EN 46106 tool through the starter mounting hole.
2. Remove and discard the crankshaft balancer bolt.
3. Install the EN 38416-2 button in the nose of the crankshaft.
4. Install the EN 41816 remover in order to remove the crankshaft balancer.
5. Tighten the center bolt of the EN 41816 remover in order to pull the crankshaft balancer off of the crankshaft.
6. Remove the EN 41816 remover from the crankshaft balancer.
7. Remove the EN 46106 tool.

Engine Flywheel Removal

Special Tools

EN 46106 Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools .

1. Install the EN 46106 tool through the starter mounting hole.
2. Remove the engine flywheel bolts and discard.
3. Remove the engine flywheel from the crankshaft.
4. Remove the EN 46106 tool.

Camshaft Cover Removal - Left Side

1. Remove the ignition coil bolts.
2. Remove the ignition coils.
3. Remove the left camshaft cover bolts.
4. Remove and discard the camshaft cover grommets and camshaft cover bolts if they are serviced with the grommet.
5. Remove the left camshaft cover from the left cylinder head.

Camshaft Cover Removal - Right Side

1. Remove the ignition coil bolts.
2. Remove the ignition coils.
3. Remove the right camshaft cover bolts.
4. Remove and discard the camshaft cover grommets and camshaft cover bolts if they are serviced with the grommet.
5. Remove the right camshaft cover from the right cylinder head.

Water Pump Removal

Special Tools

EN 46104 Water Pump Pulley Holding Tool

For equivalent regional tools, refer to Special Tools .

1. Install the EN 46104 holding tool (1) onto the water pump pulley.
2. Remove the water pump pulley bolts.
3. Remove the water pump pulley.
4. Remove and discard the water pump bolts.
5. Remove the water pump from the front cover.
6. Remove the water pump gasket.

Engine Front Cover Removal

1. Remove the camshaft position sensor bolts (1).
2. Remove the camshaft position sensors (2).
3. Remove the camshaft position actuator valve bolts (1).
4. Remove the camshaft position actuator valves (2) from the front cover.
5. Remove the engine front cover bolts (1-3).
6. Loosely install a 10 x 1.5 mm bolt in the jackscrew hole (1).
7. Using the pry points (2) located at the edge of the front cover and the jackscrew, separate the room temperature vulcanizing (RTV) sealant.
8. Remove the engine front cover (1).

Secondary Timing Chain Tensioner Removal - Right Side

1. Remove the right secondary camshaft drive chain tensioner bolts.
2. Remove the right secondary camshaft drive chain tensioner.
3. Remove and discard the right secondary camshaft drive chain tensioner gasket.
4. Inspect the right secondary camshaft drive chain tensioner mounting surface on the right cylinder head for burrs or any defects that would degrade the sealing of the NEW right secondary camshaft drive chain tensioner gasket.

Secondary Camshaft Drive Chain Shoe Removal - Right Side

1. Remove the right secondary camshaft drive chain shoe bolt.
2. Remove the right secondary camshaft drive chain shoe.

Secondary Timing Chain Guide Removal - Right Side

1. Remove the right secondary camshaft drive chain guide bolts.
2. Remove the right secondary camshaft drive chain guide.

Scheme 101

Remove the right secondary camshaft drive chain from the right camshaft position actuators and the right camshaft intermediate drive chain idler sprocket.

Primary Camshaft Intermediate Drive Chain Tensioner Removal

1. Remove the primary camshaft drive chain tensioner bolts.
2. Remove the primary camshaft drive chain tensioner.
3. Remove and discard the primary camshaft drive chain tensioner gasket.
4. Inspect the primary camshaft drive chain tensioner mounting surface on the engine block for burrs or any defects that would degrade the sealing of the NEW primary camshaft drive chain tensioner gasket.

Primary Timing Chain Guide Removal - Upper

1. Remove the primary camshaft drive chain upper guide bolts.
2. Remove the primary camshaft drive chain upper guides.

Primary Timing Chain Guide Removal - Lower

1. Remove the primary camshaft drive chain lower guide bolts.
2. Remove the primary camshaft drive chain lower guide.

Scheme 102

Remove the primary camshaft drive chain.

Timing Chain Idler Sprocket Removal - Right Side

1. Remove the right camshaft intermediate drive chain idler bolt.
2. Remove the right camshaft intermediate drive chain idler.

Secondary Timing Chain Tensioner Removal - Left Side

1. Remove the left secondary camshaft drive chain tensioner bolts.
2. Remove the left secondary camshaft drive chain tensioner.
3. Remove and discard the left secondary camshaft drive chain tensioner gasket.
4. Inspect the left secondary camshaft drive chain tensioner mounting surface on the left cylinder head for burrs or any defects that would degrade the sealing of the NEW left secondary camshaft drive chain tensioner gasket.

Secondary Camshaft Drive Chain Shoe Removal - Left Side

1. Remove the left secondary camshaft drive chain shoe bolt.
2. Remove the left secondary camshaft drive chain shoe.

Secondary Timing Chain Guide Removal - Left Side

1. Remove the left secondary camshaft drive chain guide bolts.
2. Remove the left secondary camshaft drive chain guide.

Scheme 103

Remove the left secondary camshaft drive chain from the left camshaft position actuators and the left camshaft intermediate drive chain idler sprocket.

Timing Chain Idler Sprocket Removal - Left Side

1. Remove the left camshaft intermediate drive chain idler bolt.
2. Remove the left camshaft intermediate drive chain idler.

Scheme 104

Remove the crankshaft sprocket from the nose of the crankshaft.

Camshaft Position Actuator Removal - Left Side Exhaust

1. Use an open wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
2. Remove the left exhaust camshaft position actuator bolt (1).
3. Remove the left exhaust camshaft position actuator (2).
4. Remove the camshaft thrust washer if applicable (3).

Camshaft Position Actuator Removal - Left Side Intake

1. Use an open wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
2. Remove the left intake camshaft position actuator bolt (1).
3. Remove the left intake camshaft position actuator (2).
4. Remove the camshaft thrust washer if applicable (3).

Camshaft Position Actuator Removal - Right Side Exhaust

1. Use an open wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
2. Remove the right exhaust camshaft position actuator bolt (1).
3. Remove the right exhaust camshaft position actuator (2).
4. Remove the camshaft thrust washer if applicable (3).

Camshaft Position Actuator Removal - Right Side Intake

1. Use an open wrench on the hex cast into the camshaft in order to prevent engine rotation when loosening the camshaft position actuator bolt.
2. Remove the right intake camshaft position actuator bolt (1).
3. Remove the right intake camshaft position actuator (2).
4. Remove the camshaft thrust washer if applicable (3).

Fuel Pump Removal (LF1, LFW or LFX)

1. Remove the fuel rail noise shield (1).
2. Remove the fuel rail wiring connectors from the fuel feed pipe bracket.
3. Remove the fuel feed pipe bolts (1).
4. Remove and discard the fuel feed pipe (2).
5. Remove and discard the high pressure LH to RH fuel rail crossover pipe (1).
6. Remove and discard high pressure fuel pump bolts (1).
7. Remove the high pressure fuel pump (2).
8. Remove the valve lifter follower (3).
9. Remove and discard the high pressure fuel pump gasket (4).
10. Remove and discard the high pressure fuel pump O-ring (5).

Camshaft Removal - Left Side

1. Observe the markings on the bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number indicates the journal position from the front of the engine.
2. Remove the camshaft bearing cap bolts.
3. Remove the camshaft bearing caps.
4. Remove the camshafts.

Fuel Rail Removal

Refer to Cylinder Head Disassemble (LF1, LFW or LFX) .

Scheme 105

Remove the valve rocker arms from the cylinder head. If the rocker arms are to be reused, keep in order so they can be reinstalled in the same position.

Scheme 106

Note. Do not stroke/cycle the stationary hydraulic lash adjuster plunger without oil in the lower pressure chamber. Do not allow the stationary hydraulic lash adjuster to tip over, plunger down, after the oil fill.

Remove the valve lifters (SHLAs) from the cylinder head. If the lifters are to be reused, keep in order so they can be reinstalled in the same position.

Cylinder Head Removal - Left Side (LF1, LFW or LFX)

1. Remove the two front M8 left cylinder head bolts (1) and discard.
2. Remove the left cylinder head bolts (2) and discard.
3. Remove the left cylinder head (3).
4. Remove and discard the left cylinder head gasket (1).

Camshaft Removal - Right Side

1. Observe the markings on the bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number indicates the journal position from the front of the engine.
2. Remove the camshaft bearing cap bolts.
3. Remove the camshaft bearing caps.
4. Remove the camshafts.

Scheme 107

Remove the valve rocker arms from the cylinder head. If the rocker arms are to be reused, keep in order so they can be reinstalled in the same position.

Scheme 108

Remove the valve lifters (SHLAs) from the cylinder head. If the lifters are to be reused, keep in order so they can be reinstalled in the same position.

Cylinder Head Removal - Right Side (LF1, LFW or LFX)

1. Remove the right cylinder head bolts (1) and discard.
2. Remove the right cylinder head (2) and discard.
3. Remove and discard the right cylinder head gasket (1).

Oil Pan Removal

1. Remove the oil pan bolts (1) and (2).
2. Using the pry points located at the edge of the oil pan separate the RTV sealant.
3. Remove the oil pan (1) from the block.

Oil Pump Removal

1. Remove the oil pump bolts.
2. Remove the oil pump.

Crankshaft Rear Oil Seal and Housing Removal

1. Remove the crankshaft rear oil seal housing bolts.
2. Use the pry points located at the edge of the crankshaft rear oil seal housing to separate the RTV sealant.
3. Remove and discard the crankshaft rear oil seal housing.

Piston, Connecting Rod, and Bearing Removal

Special Tools

EN 46121 Connecting Rod Guide Pin Set

For equivalent regional tools, refer to Special Tools .

1. Before removing the connecting rods, check the connecting rod side clearance using the following procedure: Tap the connecting rod to one end of the crankshaft journal with a dead-blow or wooden hammer. Using feeler gauges, measure the clearance between the crankshaft counterweight and the connecting rod. The connecting rod side clearance should not exceed specifications. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the end play exceeds the specified limits, measure the width of the crankpin end of the connecting rod. Refer to «Piston, Connecting Rod, and Bearing Cleaning and Inspection»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle) . If the connecting rod width is significantly smaller than specified and severe wear is present on the side of the connecting rod, replace the connecting rod. If the connecting rod width is within specification and excessive scoring is present on the crankshaft journals, replace the crankshaft.
2. Using a marker, number each piston face. Draw an arrow along the centerline of the piston pointing toward the front of the engine.
3. Mark the cylinder number on the connecting rod and the connecting rod cap with a scribe, paint stick or permanent marker.
4. Remove the connecting rod bolts.
5. Remove the connecting rod cap.
6. Install the EN 46121 set into the connecting rod bolt holes.
7. Using the EN 46121 set, push the connecting rod and piston assembly through the top of the cylinder. DO NOT scratch the crankshaft journal or cylinder wall and DO NOT damage the oil jets when removing the connecting rod and piston assembly.
8. Remove the EN 46121 set from the connecting rod bolt holes.
9. Remove the upper connecting rod bearing from the connecting rod.
10. Remove the lower connecting rod bearing from the connecting rod cap.
11. Reattach the connecting rod cap to the connecting rod to prevent damage to their mating surfaces. The cap and rod are a matched set and must be kept together.

Special Tools

1. GE 6125-1B Slide Hammer Adapter
2. EN 49102 Crankshaft Bearing Cap Remover

For equivalent regional tools, refer to Special Tools .

Crankshaft End Play Measurement

1. Place a dial indicator at the crankshaft nose.
2. Gently force the crankshaft to the extreme front and rear positions with a pry tool while monitoring the movement of the dial indicator.
3. The crankshaft end play should not exceed specifications. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. If the specifications are exceeded inspect the thrust bearing thrust OD and the crankshaft thrust wall for wear and/or excessive runout. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
5. Replace the thrust bearing or crankshaft as necessary.

Crankshaft Removal

1. Remove the crankshaft bearing cap side bolts.
2. Remove the crankshaft bearing cap outer bolts.
3. Remove the crankshaft bearing cap inner bolts.
4. Remove the crankshaft bearing caps using the GE 6125-1B adapter (1) and EN 49102 remover (2).
5. Using two hands, lift the crankshaft straight up from the engine block.
6. Place the crankshaft in a secure place.
7. Remove the crankshaft key from the nose of the crankshaft, if damaged.

Crankshaft Bearing Removal

1. Prepare a piece of cardboard or equivalent, numbered 1-4 for bearing identification. Main bearing journals are numbered from the front of the engine.
2. Remove the crankshaft upper bearing halves from the cylinder block. Note the position of the thrust bearing (1) at the number 3 journal (2).
3. Place the crankshaft upper bearing halves on the cardboard in the correct positions. Note that the number 3 bearing is the thrust bearing.
4. Remove the crankshaft lower bearing halves from the crankshaft bearing caps.
5. Place the crankshaft lower bearing halves in the correct positions on the cardboard.

Engine Block Disassemble

1. Remove the engine front cover studs (1).
2. Remove the block heater cartridge, if equipped.
3. Remove the right knock sensor bolt.
4. Remove the right knock sensor.
5. Remove the left knock sensor bolt.
6. Remove the left knock sensor.
7. Remove the crankshaft position sensor bolt.
8. Remove the crankshaft position sensor.
9. Remove the crankshaft position sensor O-ring, if damaged.
10. Remove oil jet bolts.
11. Remove oil jets.
12. Remove the right front oil pan rail oil gallery expansion plug.
13. Remove the cylinder block-to-oil pan alignment dowels.
14. Remove the M14 right side oil gallery threaded plug.
15. Remove the M14 right side coolant drain threaded plug.
16. Remove the M14 rear oil gallery threaded plug.
17. Remove the M14 left side coolant drain threaded plug.
18. Remove the M20 left side oil gallery threaded plug.
19. Remove the coolant expansion plugs.
20. Remove the cylinder block-to-transmission alignment dowels.
21. Remove the front oil gallery expansion plug.
22. Remove the cylinder block-to-cylinder head alignment dowels.

1. EN 8087 Cylinder Bore Gauge
2. EN 28410 Gasket Remover

For equivalent regional tools, refer to Special Tools .

Cleaning Procedure

1. Remove any old thread sealant, gasket material or sealant using EN 28410 remover.
2. Clean all the following areas with solvent: Sealing surfaces Cooling passages Oil passages Bearing journals
3. Clean all threaded and through holes with solvent.
4. Dry the engine block with compressed air.

Visual Inspection

1. Inspect the crankshaft bearings journals for damage or spun bearings. The crankshaft bearing journals are not repairable, if the crankshaft bearing journals are damaged the cylinder block assembly must be replaced.
2. Inspect the primary camshaft drive chain tensioner mounting surface on the engine block for burrs or any defects that would degrade the sealing of the NEW primary camshaft drive chain tensioner gasket.
3. Inspect all sealing and mating surfaces for damage, repair or replace the cylinder block assembly if necessary.
4. Inspect all threaded and through holes for damage or excessive debris.
5. Inspect all bolts for damage, if damaged replace with NEW bolts only.
6. Inspect the cylinder walls for cracks or damage. The cylinder sleeves are not serviced separately, if the cylinders are damaged the cylinder block assembly must be replaced.
7. Inspect the engine block for cracks. Do not repair any cracks. If cracks are found, the cylinder block assembly must be replaced.
8. Repair any damaged threaded holes. Refer to «Thread Repair Specifications»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications) , and «Thread Repair»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__thread-repair) .

Scheme 109

Measure the cylinder bore diameter 37 mm (1.457 in) from the deck face using the EN 8087 gauge.

Compare your results with the Engine Mechanical Specifications (LFX) . If the cylinder diameter exceeds the specifications, the cylinder block may be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.

Measuring Cylinder Bore Taper

1. Measure the cylinder bore along the thrust surfaces, perpendicular to the crankshaft centerline, at 10 mm (0.397 in) below the deck surface and record your measurement.
2. Measure the cylinder bore along the thrust surfaces, perpendicular to the crankshaft centerline, at 100 mm (3.976 in) below the deck surface and record your measurement.
3. Calculate the difference between the 2 measurements. The result will be the cylinder taper.
4. Compare your results with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the cylinders exceed the specifications, the cylinder block may be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.

Measuring Cylinder Bore Out-of-Round

1. Measure both the thrust and non-thrust cylinder diameter at 10 mm (0.397 in) below the deck. Record your measurements.
2. Calculate the difference between the 2 measurements. The result will indicate out-of-round at the upper end of the cylinder.
3. Measure both the thrust and non-thrust cylinder diameter at 100 mm (3.976 in) below the deck surface. Record your measurements.
4. Calculate the difference between the 2 measurements. The result will indicate out-of-round at the lower end of the cylinder.
5. Compare your results with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the cylinders exceed these specifications, the cylinder block may be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.

Deck Flatness Inspection

1. Ensure the engine block decks are clean and free of gasket material.
2. Inspect the surface for any imperfections or scratches that could inhibit proper cylinder head gasket sealing.
3. Place a straight-edge diagonally across the cylinder block deck face surface.
4. Measure the clearance between the straight-edge and the cylinder block deck face using a feeler gauge at 4 points along the straight-edge.
5. If the warpage is less than 0.05 mm (0.002 in), the cylinder block deck surface does not require resurfacing.
6. If the warpage is between 0.05-0.20 mm (0.002-0.008 in) or any imperfections or scratches that could inhibit proper cylinder head gasket sealing are present, the cylinder block deck surface requires resurfacing.
7. If resurfacing is required the maximum amount that can be removed is 0.25 mm (0.010 in).
8. If the cylinder block deck surface requires more than 0.25 mm (0.010 in) material removal the block must be replaced.

1. Clean the following components in solvent: Crankshaft bearings Connecting rod bearings Crankshaft journals Crankpin journals Crankshaft oil passages Crankshaft threaded holes
2. Dry the following components with compressed air: Crankshaft bearings Connecting rod bearings Crankshaft journals Crankpin journals Crankshaft oil passages Crankshaft threaded holes

1. Perform the following visual inspections: Inspect the crankshaft balancer bolt hole (1) for thread damage. Inspect the crankshaft balancer mounting area (2) for damage. Inspect the crankshaft keyway (3) for damage. Inspect the oil pump drive flats (4) for damage. Inspect the crankshaft main journals (5) for damage. Inspect the crankshaft connecting rod journals (6) for damage. Inspect the crankshaft oil passages (7) for obstructions. Inspect the crankshaft main bearing thrust wall surfaces (8) for damage. Inspect the crankshaft counterweights (9) for damage. Inspect the crankshaft reluctor ring teeth (10) for damage. Inspect the crankshaft rear main oil seal surface (11) for damage. Inspect the crankshaft engine flywheel mounting surface (12) for damage. Inspect the crankshaft pilot hole (13) for damage. Inspect the crankshaft engine flywheel bolt holes (14) for thread damage.
2. Repair or replace the crankshaft as necessary.

Crankshaft Bearing Inspection

1. Inspect for fatigue indicated by craters or pockets. Flattened sections on the bearing halves also indicate fatigue.
2. Inspect for excessive scoring or discoloration on both front and back of the bearing halves.
3. Inspect the main bearings for dirt embedded into the bearing material.
4. Inspect for improper seating indicated by bright, polished sections.

Crankshaft Measurement

Special Tools

GE 7872 Magnetic Base Dial Indicator

For equivalent regional tools, refer to Special Tools

1. Using a suitable fixture, support the crankshaft.
2. Install the GE 7872 indicator.
3. Measure the crankshaft runout using the GE 7872 indicator. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. Measure the crankshaft thrust wall width (1) for wear using an inside micrometer. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
5. Measure the crankshaft thrust wall surface (2) for runout using the GE 7872 indicator. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
6. If the crankshaft journals are damaged or worn beyond specifications, the crankshaft may be ground 0.25 mm (0.010 in). There is only 1 size of oversized main bearings available for service.
7. Inspect the crankshaft main journals for undersize, using an outside micrometer.
8. Inspect the crankpins for undersize using an outside micrometer.
9. Compare your measurements with those listed in the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the crankpin journals are worn beyond the specifications, the crankshaft may be ground 0.25 mm (0.010 in). There is only 1 size of oversized connecting rod bearings available for service.
10. Measure the main bearing and crankpin journals for out-of-round using the following procedure: Using an outside micrometer, measure the journal at the extreme front and rear locations on the journal. Call these points A and B. Measure the journal in 2 new locations exactly 90 degrees from the first points. Call these points C and D. Subtract A from C and B from D. The differences will indicate journal out-of-round. The out-of-round should not exceed 0.004 mm (0.00016 in) maximum. If the journals are worn beyond the specifications, the crankshaft may be ground 0.25 mm (0.010 in). There is only 1 size of oversized crankshaft and connecting rod bearings available for service.
11. Measure the main bearing and crankpin journals for taper using the following procedure: Using an outside micrometer, measure the journal at the extreme front (A) and rear (B) of the journal parallel to the crankshaft centerline. Subtract the smallest from the largest measurement. The result will be the journal taper. If the main bearing journal taper exceeds 0.004 mm (0.00016 in), replace the crankshaft. If the journals are worn beyond the specifications, the crankshaft may be ground 0.25 mm (0.010 in). There is only 1 size of oversized crankshaft and connecting rod bearings available for service.

1. Clean the crankshaft balancer in solvent that is compatible with the rubber (1).
2. Dry the crankshaft balancer with compressed air.

Inspection Procedure

1. Inspect the crankshaft balancer for the following: Worn or damaged hub-to-crankshaft surface (1) Worn, grooved or damaged hub seal surface (2) A crankshaft balancer hub seal surface with excessive scoring, grooves, rust or other damage must be replaced. Worn, chunking or deteriorated rubber between the hub and pulley (3) Damaged drive belt ribs (4) Damaged webs (5)
2. Repair or replace the crankshaft balancer as necessary.

1. Clean the engine flywheel in solvent.
2. Dry the engine flywheel with compressed air.

1. Inspect the engine flywheel for the following conditions: Stress cracks around the engine flywheel-to-torque converter mounting bolt hole locations (1) and/or engine flywheel-to-crankshaft (2, 4) NOTE: Do not attempt to repair the welded areas that retain the ring gear to the engine flywheel plate. Install a new engine flywheel. Cracks at welded areas that retain the ring gear onto the engine flywheel (3) Damaged or missing ring gear teeth (5)
2. Replace the engine flywheel as necessary.

Piston and Connecting Rod Disassemble

Special Tools

EN-46745 Piston Pin Clip Remover/Installer

For equivalent regional tools, refer to Special Tools .

1. Remove the piston rings using a piston ring expander. Place each ring in a clean shop towel for storage.
2. Using the EN-46745 remover/installer, remove the piston pin retainers by using the removal access notch (1) in the side of the piston. Discard the piston pin retainers.
3. Slide the piston pin out of the piston. The piston will disconnect from the connecting rod.

1. Clean the piston skirts and the pins with a cleaning solvent.
2. Clean the piston ring grooves with a groove cleaner. Ensure that the oil ring holes and slots are clean.
3. Dry the piston with compressed air.

Piston Inspection Procedure

1. Inspect the pistons for the following conditions: Cracked ring lands, skirts or pin bosses Ring grooves for nicks, burrs that may cause binding (5) Warped or worn ring lands (5) Piston pin retainer grooves for burrs (2) Eroded areas at the top of the piston (1) Scuffed or damaged skirt coating (4) Worn piston pin bores or worn piston pins (3)
2. Replace pistons that show any signs of damage or excessive wear.

Piston Measurement Procedure

1. Measure piston width using the following procedure: Using an outside micrometer, measure the width of the piston at 30 mm (1.181 in) below the crown, top (1), at the thrust surfaces of the piston, perpendicular to the piston pin centerline. Compare the measurement of the piston to its original cylinder by subtracting the piston width from the cylinder diameter. Check your measurements with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the clearance obtained through measurement is greater than the provided specifications and the cylinder bores are within specification, replace the piston.
2. Measure the piston pin bore to piston pin clearances using the following procedure: Piston pin bores and pins must be free of varnish or scuffing. Use an outside micrometer to measure the piston pin in the piston contact areas.
3. Using an inside micrometer, measure the piston pin bore. Compare your result with the piston pin diameter and piston pin to piston pin bore clearance listed in the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. If the clearance is excessive, determine which piece is out of specification and replace as necessary.
5. You must replace the piston if any of its dimensions are out of specification.
6. If the new piston does not meet clearance specifications, the cylinder block may need to be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.

Piston Ring Measurement Procedure

1. Measure the piston ring end gap using the following procedure: Place the piston ring in the area of the bore where the piston ring will travel approximately 25 mm (1 in) down from the deck surface. Ensure that the ring is square with the cylinder bore by positioning the ring with the piston head. Measure the end gap of the piston ring with feeler gauges. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the clearance exceeds the provided specifications, the piston rings must be replaced. Repeat the procedure for all the piston rings.
2. Measure the piston ring side clearance using the following procedure: Roll the piston ring entirely around the piston ring groove. If any binding is caused by the ring groove, dress the groove with a fine file. If any binding is caused by a distorted piston ring, replace the ring. With the piston ring on the piston, use feeler gauges to check clearance at multiple locations. Compare the measurements with piston ring side clearance listed in the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the clearance is greater than specifications, replace the piston rings.
3. There is a locating dimple (1) on the compression rings near the end for identification. Install the compression rings with the dimple facing up.
4. If the new ring does not reduce the clearance to the proper specification, install a new piston.
5. If the new piston does not meet clearance specifications, the cylinder block may need to be oversized to 0.25 mm (0.010 in). There is only one size of oversized pistons and rings available for service.

Connecting Rod Cleaning Procedure

1. Clean the connecting rods in solvent.
2. Dry the connecting rod using compressed air.
3. Remove the connecting rod cap and clean the threads.
4. Remove the connecting rod bearing and discard. Never reuse a connecting rod bearing used in a running engine.

Connecting Rod Visual Inspection Procedure

1. Inspect the piston pin bushing (4) for scoring or damage.
2. Inspect the connecting rod beam (1) for twisting or bending.
3. Inspect the rod cap (2) for any nicks or damage caused by possible interference.
4. Inspect for scratches or abrasion on the rod bearing seating surface.
5. If the connecting rod bores contain minor scratches or abrasions, clean the bores in a circular direction with a light emery paper.

Connecting Rod Measurement Procedure

Piston Pin End

1. Using an outside micrometer, take 2 measurements of the piston pin in the area of the connecting rod contact.
2. Using an inside micrometer, measure the connecting rod piston pin bore.
3. Subtract the piston pin diameter from the piston pin bore.
4. Compare the clearance measurements with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
5. If the clearance is excessive, replace the piston pin. If a new pin does not resolve the clearance problem, replace the connecting rod.

Connecting Rod Crankshaft Bearing End

1. Using an inside micrometer, measure the connecting rod crankshaft bearing bore.
2. Compare the bore measurements with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
3. Replace the connecting rod if the bore is out of specifications. DO NOT recondition the connecting rod.

1. EN 46121 Connecting Rod Guide Pin Set
2. EN-46745 Piston Pin Clip Remover/Installer

For equivalent regional tools, refer to Special Tools

Piston and Piston Pin Installation Procedure

1. Lubricate the piston pin bores in the piston and the connecting rod with GM prelube lubricant. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
2. Assemble the piston and piston pin to the connecting rod. Properly orient the piston when reusing a marked connecting rod.
3. Align the piston pin bore with the connecting rod pin bore.
4. Slide the piston pin into the piston and the connecting rod.
5. Install NEW piston pin retainers using the EN-46745 remover/installer. Align the EN-46745 remover/installer to the notch (1) in the piston.
6. Ensure that the piston pin retainers are fully seated in their grooves.
7. Repeat these procedures for the remaining pistons.

Piston Ring Installation Procedure

1. Properly orient the oil control ring expander as shown before installation. The ends of the expander must be facing toward the top of the piston.
2. Using a piston ring expander, install the oil control ring assembly using the following procedure: Install the expander ring (3). Install the 2 oil scraper rings (4). Expand the rings only enough to clear the piston diameter. Overexpanding the piston rings will distort or crack the rings.
3. Install the lower compression piston ring (2) onto the piston. The mark on the piston ring should face the top of the piston.
4. Install the upper compression piston ring (1) onto the piston. The top compression ring may be installed with either side up.
5. Once the rings are installed, set the ring gaps for the oil control, second and top ring as follows. Use the piston location arrow for reference. Lower oil control ring - position 1 Upper oil control ring - position 2 Top Ring - position 3 Oil control ring expander - position 4 Second ring - position 5

Connecting Rod Bearing Installation Procedure

1. Clean the connecting rod and the connecting rod cap bearing bore with a lint-free cloth.
2. Clean all the oil from behind the connecting rod bearing halves.
3. Install NEW upper connecting rod bearings into position. Roll the bearing into position so that the lock tang engages the alignment slot. The bearing must fit flush in the connecting rod.
4. Install the EN 46121 set into the connecting rod bolt holes.
5. Install NEW lower connecting rod bearings into position in the connecting rod cap. Roll the bearing into position so that the lock tang engages the alignment slot. The bearings must fit flush with the connecting rod cap.

Cylinder Head Disassemble (LF1, LFW or LFX)

Special Tools

1. EN 8062 Valve Spring Compressor - Head Off
2. EN 46116 Valve Stem Seal Remover/Installer
3. EN 46117 Valve Stem Key Remover/Installer
4. EN 46119 Off-Vehicle Valve Spring Compressor Adapter
5. EN 46122 Camshaft Position Actuator Check-Ball Valve Remover/Installer
6. EN 49248 Injector Rail Assembly Remover

For equivalent regional tools, refer to Special Tools .

1. Remove the fuel rail bolts (1).
2. Remove the fuel rail and injectors (1) as an assembly using the EN 49248 remover.
3. Remove the spark plugs.
4. Using an appropriately sized deep socket and a plastic hammer, lightly tap on the valve spring retainer to loosen the valve keepers.
5. Compress the valve spring using the EN 8062 compressor and the EN 46119 adapter.
6. Use the magnet of the EN 46117 remover/installer in order to remove the valve keepers.
7. Remove the valve spring compressor and the adapter.
8. Remove the valve spring retainer.
9. Remove the valve spring.
10. Remove the valve.
11. Remove the valve stem oil seal using the EN 46116 remover/installer and discard.
12. Repeat these procedures for the remaining valves.
13. Remove the cylinder head oil gallery expansion plugs.
14. Remove the cylinder head coolant threaded plugs.
15. Inspect the camshaft position actuator oil feed check valves. Damaged, restricted or clogged check valves must be replaced. If check valves are OK, disregard remaining steps which detail replacing the check valves.
16. Place cylinder head on firm surface with check valves (1) facing up. Protect all cylinder head components and machined surfaces.
17. Using drill bit EN-46122-3, drill out top portion of check valve to expose internal check ball.
18. Remove check ball (1) and check ball spring (2) from inside of check valve.
19. Continue drilling remainder of check valve sleeve to a depth of approximately 19 mm (0.75 in) (a) by placing tape on drill bit as a depth gauge. It is not necessary or desirable to drill completely through the bottom of the check valve.
20. Lubricate tap EN-46122-4 with lubricant included in EN-46122 remover/installer. Tap drilled out portion of check valve (1) remaining in cylinder head. Tap to full depth possible until tap bottoms out in head.
21. Assemble bolt, nut, washers, and collar EN-46122-2 (1) as shown. Position collar with slightly-larger inside diameter DOWN toward the cylinder head.
22. Screw bolt by hand fully down into threaded check valve sleeve, then lightly tighten nut against washer.
23. Hold bolt with one wrench, and use another to tighten the nut until the check valve sleeve (1) is removed from the cylinder head.
24. Clean check valve bore and related passages thoroughly to remove any drilling chips or other debris.

1. GE 8001 Dial Indicator Set
2. GE 8358 Carbon Removal Brush
3. EN 28410 Gasket Remover
4. EN 42096 Valve Guide Reamer
5. EN 47909 Injector Bore and Sleeve Cleaning Kit

For equivalent regional tools, refer to Special Tools .

1. Remove any old thread sealant, gasket material or sealant using EN 28410 remover.
2. Clean all cylinder head surfaces with non-corrosive solvent.
3. Blow out all the oil galleries using compressed air.
4. Remove any carbon deposits from the combustion chambers using the GE 8358 brush.
5. Clean any debris or build-up from the lifter pockets.

1. Inspect the cylinder head camshaft bearing surfaces for the following conditions: Excessive scoring or pitting Discoloration from overheating Deformation from excessive wear If the camshaft bearing journals appear to be scored or damaged, you must replace the cylinder head. DO NOT machine the camshaft bearing journals.
2. If any of the above conditions exist on the camshaft bearing surfaces, replace the cylinder head.
3. Inspect the cylinder head for the following: Cracks, damage or pitting in the combustion chambers Debris in the oil galleries - Continue to clean the galleries until all debris is removed. Coolant leaks or damage to the deck face sealing surface - If coolant leaks are present, measure the surface warpage as described under Cylinder Head Measurement - Deck Flatness Inspection. Burrs or any defects that would degrade the sealing of the NEW secondary camshaft drive chain tensioner gasket Damage to any gasket surfaces Damage to any threaded bolt holes Burnt or eroded areas in the combustion chamber Cracks in the exhaust ports and combustion chambers External cracks in the water passages Restrictions in the intake or exhaust passages Restrictions in the cooling system passages Rusted, damaged or leaking core plugs
4. If the cylinder head is cracked or damaged, it must be replaced. No welding or patching of the cylinder head is recommended.
5. Inspect the camshaft position actuator oil feed check valves. Damaged, restricted or clogged check valves must be replaced. Refer to «Cylinder Head Disassemble (LF1, LFW or LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__cylinder-head-disassemble-lf1-lfw-or) .
6. Inspect the fuel rail injector bores and clean with EN-47909 kit, if required.

Cylinder Head Measurement

Camshaft Journal Clearance

1. Install the camshaft bearing cap in the cylinder head without the camshaft.
2. Install the camshaft cap bolts and tighten to 10 N.m (89 lb in).
3. Measure the camshaft bearings using an inside micrometer.
4. Subtract the camshaft journal diameter from the camshaft bearing diameter. This will provide the running clearance. If the running clearance exceeds specifications and the camshaft journals are within specification, replace the cylinder head.

Camshaft Journal Alignment

1. Ensure the camshafts are serviceable.
2. Inspect the cylinder head camshaft bearing surfaces for any imperfections or scratches that could inhibit proper camshaft clearances. Repair minor imperfections or scratches.
3. Install the camshafts in the cylinder head.
4. Install the camshaft bearing caps.
5. Install the camshaft cap bolts and tighten to 10 N.m (89 lb in).
6. Ensure the camshafts spin freely in the cylinder head. If the camshaft does not run freely, replace the cylinder head.

Deck Flatness Inspection

1. Ensure the cylinder head decks are clean and free of gasket material.
2. Inspect the surface for any imperfections or scratches that could inhibit proper cylinder head gasket sealing.
3. Place a straight-edge diagonally across the cylinder head deck face surface.
4. Measure the clearance between the straight-edge and the cylinder head deck face using a feeler gauge at 4 points along the straight-edge.
5. If the warpage is less than 0.05 mm (0.002 in), the cylinder head deck surface does not require resurfacing.
6. If the warpage is between 0.05-0.20 mm (0.002-0.008 in) or any imperfections or scratches that could inhibit proper cylinder head gasket sealing are present, the cylinder head deck surface requires resurfacing.
7. If resurfacing is required the maximum amount that can be removed is 0.25 mm (0.010 in).
8. If the cylinder head deck surface requires more than 0.25 mm (0.010 in) material removal the head must be replaced.

Valve Guide Measurement

1. Measure the valve stem (1)-to-guide (2) clearance. Excessive valve stem-to-guide clearance may cause an excessive oil consumption and may also cause a valve to break. Insufficient clearance will result in noisy and sticky functioning of the valve and will disturb the engine assembly smoothness.
2. Clamp the GE 8001 set to the cylinder head at the camshaft cover rail.
3. Locate the dial indicator so that the movement of the valve stem from side to side, crossways to the cylinder head, will cause a direct movement of the indicator stem. The dial indicator stem must contact the side of the valve stem just above the valve guide.
4. Drop the valve head about 0.064 mm (0.0025 in) off the valve seat.
5. Use light pressure when moving the valve stem from side to side in order to obtain a clearance reading. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) for proper clearance. If the clearance for the valve is greater than specifications and a new standard diameter valve stem will not bring the clearance within specifications, the valve guide may be oversized by 0.075 mm (0.003 in) using the EN 42096 reamer. There is 1 size of oversized valve stem available for service. Valve guide wear at the bottom 10 mm (0.390 in) of the valve guide is not significant to normal operation. If oversizing the guide does not bring the clearance within specifications, replace the cylinder head.

Valve Spring Inspection and Measurement

Special Tools

EN 22738-B Valve Spring Tester

For equivalent regional tools, refer to Special Tools .

1. Clean the valve springs in solvent.
2. Dry the valve springs with compressed air.
3. Inspect the valve springs for broken coils or coil ends.

Measurement Procedure

1. Measure the valve spring tension using the EN 22738-B tester. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
2. If low valve spring load is found, replace the valve springs. DO NOT use shims to increase spring load. The use of shims can cause the valve spring to bottom out before the camshaft lobe is at peak lift.

Valve Cleaning Procedure

1. Use soft bristle wire brush to clean any carbon build-up from the valve head. DO NOT use a wire brush on any part of the valve stem. The valve stem is chrome plated to provide enhanced wear characteristics. Wire brushing the stem could remove the chrome plating.
2. Thoroughly clean the valve with solvent and wipe dry.

Valve Visual Inspection Procedure

1. Inspect the valve for damage from the head to tip for the following conditions: Pitting in the valve seat area (1) Lack of valve margin (2) Bending in the valve stem (3) Pitting or excessive wear in the stem (4) Worn valve key grooves (5) Worn valve tip (6)
2. Replace the valve if any of these conditions exist.

Valve Measurement Overview

1. Proper valve service is critical to engine performance. Therefore, all detailed measurement procedures must be followed to identify components that are out of specification.
2. If the measurement procedures reveal that the valve seat must be reconditioned, it is critical to perform the measurement procedures after reconditioning. Valves for E85-compatible engines CANNOT be reconditioned. Any grinding, lapping, wire-brushing or other similar procedure will damage or destroy the coating that gives the valve the E-85 compatible features. If an E85-compatible valve is out of specification in any area, replace it.

Valve Seat Width Measurement Procedure

1. Measure the valve seat width in the cylinder head using a proper scale.
2. Measure the seat width on the valve face (1) using a proper scale.
3. Compare your measurements with the specifications listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. If the seat widths are acceptable, check the valve seat roundness using the Valve Seat Roundness Measurement Procedure.
5. If the seat width is not acceptable, you must replace the valve. Proper valve seat width is critical to providing the correct amount of valve heat dissipation.

Valve Seat Roundness Measurement Procedure

1. Measure the valve seat roundness using a dial indicator attached to a tapered pilot installed in the guide. The pilot should have a slight bind when installed in the guide.
2. Compare your measurements with the specifications listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
3. If the valve seat exceeds the roundness specification, you must replace the valve.
4. If new valves are being used, the valve seat roundness must be within 0.05 mm (0.002 in).

Valve Margin Measurement Procedure

1. Measure the valve margin using an appropriate scale.
2. Reference the specifications in this section for minimum valve margin and compare them to your measurements.
3. If the valve margins are beyond specification, replace the valves.
4. If the valve margins are within specification, test the valve for seat concentricity using the Valve-to-Seat Concentricity Measurement Procedure.

Valve-to-Seat Concentricity Measurement Procedure

1. Coat the valve face lightly with blue dye (3).
2. Install the valve in the cylinder head.
3. Turn the valve against the seat with enough pressure to wear off the dye.
4. Remove the valve from the cylinder head.
5. Inspect the valve face. If the valve face is concentric, providing a proper seal-with the valve stem, a continuous mark will be made around the entire face (1). NOTE: The wear mark MUST be at least 0.5 mm (0.020 in) from the outer diameter, the margin, of the valve. If the wear mark is too close to the margin, the seat must be reconditioned to move the contact area away from the margin. If the face is not concentric with the stem, the mark will NOT be continuous around the valve face. The valve should be replaced and the seat must be reconditioned using the Valve and Seat Reconditioning Procedure.

Valve and Seat Reconditioning Procedure

1. Grind the valve seats (2) to the proper angle specification listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
2. Using the proper angle specification listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) , grind, relieve, the valve seats (1) to correctly position the valve seating surface (2) to the valve.
3. Using the proper angle specification listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) , grind, undercut, the valve seats (3) to narrow the valve seat widths to the specifications listed in «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. When grinding the seats, grind off as little material as possible. Cutting valve seat results in lowering the valve spring pressure.
5. Install the valve in the cylinder head. Do not lap the valves under any condition, whether the valves are new or used.
6. After obtaining the proper valve seat width in the cylinder head, you must re-measure the valve stem height using the Valve Stem Height Measurement Procedure.
7. If the valve stem height is acceptable, test the seats for concentricity using the Valve-to-Seat Concentricity Measurement Procedure.

Valve Stem Height Measurement Procedure

1. Install the valve into the valve guide.
2. Ensure the valve is seated to the cylinder head valve seat.
3. Install the valve stem oil seal.
4. Install the valve spring retainer and valve stem locks.
5. Measure the distance (1) between the cylinder head to the bottom of the valve spring retainer. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
6. If the maximum height specification is exceeded, a new valve should be installed and the valve stem height re-measured.
7. If the valve stem height still exceeds the maximum height specification, the cylinder head must be replaced.

Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)

Special Tools

1. EN 49245 Injector Seal Installer Kit
2. EN 49247 Injector Retaining Clip Installer

For equivalent regional tools, refer to Special Tools .

1. Disconnect and remove the fuel rail wiring harness (1).
2. Taking care not to touch or apply force to the injector tip or electrical connector, remove the fuel injector retainer (1) by spreading both sides at the same time. A large, sturdy snap ring plier can help with this. Discard the retainer.
3. Holding the largest diameter/body of the injector only, indicated by arrow in graphic, and using a slight twisting motion, remove the fuel injector (2) from the fuel rail.
4. Using pliers, remove the fuel injector bushing (3) straight out from injector body. Discard bushing (3). Remove and discard the fuel injector O-ring (1) and plastic spacers (2).
5. Remove and discard the fuel injector seals (4).
6. Remove the fuel pressure sensor (1).
7. Clean the exterior of the fuel rail and injectors with solvent.
8. Inspect the fuel rail (1) and components for the following conditions: Damage, debris or restrictions to the fuel rail Damage, debris or restrictions to the fuel ports in the fuel rail Damage to the mounting area for the fuel rail Damage to the fuel rail mounting bolts or mounting bolt grommets/isolators Damage to the threads on the fuel rail feed fitting Damage to the threads in the fuel pressure sensor bore Damage to the fuel pressure sensor connector, threads, or sealing face
9. Install the fuel pressure sensor (1). NOTE: Ensure that the fuel rail threads have been cleaned of any excess fuel or the fuel pressure sensor will NOT seal properly. Lubricate the threads and the sealing area in the fuel rail with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant. Lubricate the threads and the sealing area on the fuel pressure sensor with silicon free engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant. Install the fuel pressure sensor hand tight. Remove the fuel pressure sensor and re-lubricate. CAUTION: Refer to «Fastener Caution»(/buick/lacrosse/ii-2009-2013/remont/oem-general-information/#dangers-warnings-and-cautions__fastener-caution) . Install the fuel pressure sensor and tighten to 33 N.m (25 lb ft).
10. Inspect the fuel injectors for the following conditions: Damage to the fuel injector connector (1) Damage to the fuel inlet cone (2) Damage to the fuel injector body (3) Damage to the fuel injector tip (4)
11. Replace the fuel rail or injector if any damage is found. Do not attempt to repair a fuel rail or injector.
12. Install NEW fuel injector bushing (1) onto injector body. Bushing should seat with a distinct "snap" sound and feel. Ensure bushing is fully seated.
13. Install the NEW white plastic spacer (3) on the fuel injector first.
14. Install the brown plastic spacer (2) second.
15. Lubricate the NEW O-ring (1) with 5W30 engine oil.
16. Holding the largest diameter/body of the injector only, indicated by arrow in graphic, insert the injector assembly (1) into the fuel rail. Ensure correct orientation of the electrical connector (2).
17. Clamp the fuel rail in a bench vise USING SOFT JAWS to aid in holding the rail during the installation of the retainer.
18. Install the fuel injector retainer onto the EN 49247 installer.
19. Note the following points when preparing to use the EN 49247 installer. There is a 15-degree angle of rotation (1) with the fuel rail flanges relative to the fuel rail. You must hold the EN 49247 installer at a similar angle to ensure installing the retainer properly.
20. The retainer (1) should almost touch the electrical connector (2), and the base of the EN 49247 installer should be positioned as shown before you begin to squeeze the tool to complete the installation. This will help ensure the retainer is properly located relative to the injector and fuel rail flanges.
21. Holding the injector bushing (2) and fuel rail flanges (1) in alignment, and holding the injector assembly firmly against the fuel rail so there is no gap between (1) and (2), install the fuel injector retainer (3).
22. Ensure all 3 fuel injector bushing tabs and fuel rail flanges (1) are properly and completely captured by the fuel injector retainer.
23. Repeat for remaining injectors until all are installed and retained in fuel rail.
24. Install the fuel rail wiring harness (1).
25. Install EN 49245-1 long protector (3) onto the fuel injector tip, covering the first recessed area closest to the tip. Place a NEW seal (2) on EN-49245-1 long protector.
26. Using EN-49245-3 pusher (1), install the seal into the second recessed area (4) of the fuel injector.
27. Compress the seal with your fingers, then resize the seal using the EN-49245-4 sizer (5).
28. Install EN-49245-2 short protector (3) onto the fuel injector tip. Place a NEW seal (2) on EN-49245-2 short protector.
29. Using EN-49245-3 pusher (1), install the seal into the first recessed area (4) of the fuel injector.
30. Compress the seal with your fingers, then resize the seal using the EN-49245-4 sizer (5).

Cylinder Head Assemble (LF1, LFW or LFX)

Special Tools

1. EN 8062 Valve Spring Compressor - Head Off
2. EN 46116 Valve Stem Seal Remover/Installer
3. EN 46117 Valve Stem Key Remover/Installer
4. EN 46119 Off-Vehicle Valve Spring Compressor Adapter
5. EN 46122 Camshaft Position Actuator Check-Ball Valve Remover/Installer

For equivalent regional tools, refer to Special Tools .

1. Use lubricant included with EN 46122 remover/installer to lubricate outside of new check valve (1).
2. With the check ball end of the check valve facing UP, away from the head, insert the NEW check valve into the check valve bore in the cylinder head.
3. Place collar EN 46122-2 (1) over the new check valve with the slightly-larger inside diameter of the collar DOWN toward the cylinder head.
4. Using the driver EN 46122-1 (2), lightly tap the new check valve into place until the driver stops against the top of the collar.
5. Inspect the camshaft position actuator oil feed check valves in order to ensure they are properly installed in the cylinder head. The camshaft position actuator oil feed check valve should be flush to 2 mm (0.0787 in) below the cylinder head deck surface (a).
6. Install the cylinder head coolant threaded plugs and tighten to 31 N.m (23 lb ft).
7. Install the NEW cylinder head oil gallery expansion plugs.
8. Place the valve stem oil seals onto the guides.
9. Mount a new valve stem oil seal using the EN 46116 remover/installer.
10. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the EN 46116 remover/installer.
11. Lubricate the valve stem and valve guide ID with clean engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
12. Insert the valve into the valve guide until it bottoms on the valve seat.
13. Position the valve spring on the spring seat.
14. Place the valve spring retainer onto the valve spring.
15. Compress the valve spring using the EN 8062 compressor and the EN 46119 adapter.
16. With the spring compressed, install the valve keepers into the EN 46117 remover/installer.
17. Place the keepers into position by pushing the tool downward. While holding the tool lightly together in the area between the O-rings, using the thumb and forefinger, release tension on the EN-46119 adapter and the EN 8062 compressor. This will slowly push the EN-46117 remover/installer off the valve stem, leaving the keepers in place.
18. Verify that the valve keepers are installed by placing a rag over the valve tip and tapping with a dead-blow hammer.
19. Install the fuel rail with injectors (2) into the cylinder head evenly.
20. Install and hand tighten the two outer fuel rail bolts (1) to seat the injectors in the injector bores.
21. Install and hand tighten the two inner fuel rail bolts.
22. Tighten the fuel rail bolts in the sequence shown to 25 N.m (18 lb ft).

Camshaft Cleaning and Inspection

Special Tools

GE 7872 Magnetic Base Dial Indicator

For equivalent regional tools, refer to Special Tools .

1. Clean the camshaft in solvent.
2. Dry the camshaft with compressed air.

1. Inspect the camshaft oil feed holes (1) to the camshaft position actuator for dirt, debris or blockage.
2. Inspect the threaded hole (2) for damage.
3. Inspect the camshaft position actuator locating notch (3) for damage or wear.
4. Inspect the camshaft sealing grooves (4) for damage.
5. Inspect the camshaft thrust surface (5) for damage.
6. Inspect the camshaft lobes (6) and journals (7) for the following conditions: Excessive scoring or pitting Discoloration from overheating Deformation from excessive wear, especially the camshaft lobes
7. If any of the above conditions exist on the camshaft, replace the camshaft.

Camshaft Measurement

1. With the camshaft in a suitable fixture, measure the camshaft for wear.
2. Measure the camshaft journals for diameter and out-of-round using an outside micrometer. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the diameter is smaller than specifications, replace the camshaft. If the out-of-round exceeds specifications, replace the camshaft.
3. Measure the camshaft runout using the GE 7872 indicator. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
4. Measure the camshaft thrust width for wear using a depth micrometer. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
5. Measure the camshaft thrust wall surface for runout using GE 7872 indicator. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) .
6. If the camshaft is damaged or worn beyond specifications, replace the camshaft. No machining of the camshaft is allowed.
7. Measure the camshaft lobes for wear using the GE 7872 indicator.
8. Place the GE 7872 indicator with the indicator tip on the base circle (1) of the camshaft lobe. Place the GE 7872 indicator at zero. Rotate the camshaft until the indicator tip is at the highest point (3) on the lobe. This reading is the lift of the camshaft lobe. Refer to «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the indicated measurement is significantly lower than these specifications, replace the camshaft or engine performance will be reduced.

Valve Lifter Cleaning and Inspection

1. Inspect the stationary hydraulic lash adjuster (SHLA) in the following areas: A plugged oil passage (1) A scored or worn camshaft follower pivot area (2) A damaged or broken retainer (3), some applications A severely scuffed or worn SHLA body (4)
2. Replace the SHLA or SHLAs as necessary.

Valve Rocker Arm Cleaning and Inspection

1. Inspect the camshaft follower roller (1) for the following: Flat spots Excessive scoring and pitting Ensure the roller spins freely
2. Inspect the camshaft follower valve tip area (2).
3. Inspect the camshaft follower stationary hydraulic lash adjuster (SHLA) pivot area (3).
4. Replace the camshaft follower or followers as necessary.

1. Clean all the following components with solvent: Crankshaft sprocket Primary timing drive chain Primary timing drive chain shoe Primary timing drive chain guides Primary timing drive chain tensioner Secondary timing drive chains Secondary timing drive chain shoes Secondary timing drive chain guides Secondary timing drive chain tensioners Timing component fastening bolts
2. Clean each camshaft position actuator's exterior with solvent.
3. Dry the timing components with compressed air.

Camshaft Thrust Washers

1. Inspect the camshaft thrust washers for deep scoring or uneven wear (1).
2. Replace as necessary.

Camshaft Position Actuators

1. Inspect the front of the exhaust camshaft position actuators for the following: Sprocket damage (1) Reluctor/sensor wheel damage (2) Camshaft position actuator bolt seating/sealing inner hub flange damage (3)
2. Inspect the back of the exhaust camshaft position actuators for the following: Sprocket damage (1) Camshaft locating pin damage (2) Camshaft seating/sealing inner hub flange damage (3) Blockage to the oil passages (4) Loose or missing housing bolts (5)
3. Inspect the front of the left intake camshaft position actuators for the following: Sprocket damage (1) Reluctor/sensor wheel damage (2) Camshaft position actuator oil control valve bolt seating/sealing inner hub flange damage (3)
4. Inspect the back of the left intake camshaft position actuators for the following: Sprocket damage (1) Camshaft locating pin damage (2) Camshaft seating/sealing inner hub flange damage (3) Blockage to the oil passages (4) Loose or missing housing bolts (5)
5. Inspect the front of the right intake camshaft position actuators for the following: Sprocket damage (1) Reluctor/sensor wheel damage (2) Camshaft position actuator oil control valve bolt seating/sealing inner hub flange damage (3)
6. Inspect the back of the right intake camshaft position actuators for the following: Sprocket damage (1) Camshaft locating pin damage (2) Camshaft seating/sealing inner hub flange damage (3) Blockage to the oil passages (4) Loose or missing housing bolts (5)
7. Replace a damaged camshaft position actuator.

Camshaft Position Actuator Oil Control Valves

1. Inspect the camshaft position actuator oil control valves for the following: Blockage to the oil passage (1) Missing or damaged oil screen clip (2) Blockage or damage to the oil screen (3) Damage to the sealing surface for the camshaft position actuator oil control valve solenoid oil seal (4) Damage to the bracket (5) Damage to the wiring harness connection and/or terminals (6)
2. Replace a damaged camshaft position actuator oil control valve.

Left Intermediate Sprocket with Primary and Secondary Inverted Tooth (IT) Chain

1. Inspect the front of the left intermediate sprocket for the following: Damage to the primary camshaft drive chain sprocket (1) Damage to the hub bearing (2)-Ensure the hub bearing spins freely. If the hub bearing wobbles, is noisy, or feels rough when rotated, replace the intermediate sprocket. Damage to the bolt flange seating/sealing surface (3)
2. Inspect the back of the left intermediate sprocket for the following: Damage to the left secondary camshaft drive chain sprocket (1) Damage to the bearing hub-to-engine block sealing surface (2)
3. Replace a damaged left intermediate sprocket.

Right Intermediate Sprocket with Primary and Secondary Inverted Tooth (IT) Chain

1. Inspect the front of the right intermediate sprocket for the following: Damage to the right secondary camshaft drive chain sprocket (1) Damage to the hub bearing (2)-Ensure the hub bearing spins freely. If the hub bearing wobbles, is noisy, or feels rough when rotated, replace the intermediate sprocket. Damage to the bolt flange seating/sealing surface (3)
2. Inspect the back of the right intermediate sprocket for the following: Damage to the primary camshaft drive chain sprocket (1) Damage to the bearing hub-to-engine block sealing surface (2)
3. Replace a damaged right intermediate sprocket.

Crankshaft Sprocket with Primary Inverted Tooth (IT) Chain

1. Inspect the crankshaft sprocket for the following: Sprocket damage (1) Bore damage (2) Keyway damage (3)
2. Replace a damaged crankshaft sprocket.

Secondary Timing Chains with Inverted Tooth (IT) Chain

1. Inspect the secondary timing chain for the following: Binding or worn links (1) Loose links (2) Loose pins (3)
2. Replace a damaged secondary timing chain.

Primary Timing Chain with Inverted Tooth (IT) Chain

1. Inspect the primary timing chain for the following: Binding or worn links (1) Loose links (2) Loose pins (3)
2. Replace a damaged primary timing chain.

Primary Timing Chain Upper Guide

1. Inspect the primary timing chain upper guide for the following: Worn guide surface (1) Cracked or broken guide surface (2) Cracked or damaged guide base (3)
2. Replace a damaged primary timing chain upper guide.

Primary Timing Chain Lower Guide

1. Inspect the primary timing chain lower guide for the following: Worn guide surface (1) Cracked or broken guide surface (2) Cracked or damaged guide base (3)
2. Replace a damaged primary timing chain lower guide.

Left Secondary Timing Chain Guide

1. Inspect the left secondary timing chain guides for the following: Worn guide surface (1) Cracked or broken guide surface (2) Cracked or damaged guide base (3)
2. Replace a damaged left secondary timing chain guide.

Right Secondary Timing Chain Guide

1. Inspect the right secondary timing chain guides for the following: Worn guide surface (1) Cracked or broken guide surface (2) Cracked or damaged guide base (3)
2. Replace a damaged right secondary timing chain guide.

Left Secondary Timing Chain Shoe

1. Inspect the front of the left secondary timing chain shoe for the following: Worn shoe surface (1) Cracked or broken shoe surface (2) Cracked or damaged shoe (3)
2. Inspect the back of the left secondary timing chain shoe for a damaged, worn, or missing left secondary timing chain tensioner contact pad (1).
3. Replace a damaged left secondary timing chain shoe.

Right Secondary Timing Chain Shoe

1. Inspect the front of the right secondary timing chain shoe for the following: Worn shoe surface (1) Cracked or broken shoe surface (2) Cracked or damaged shoe (3)
2. Inspect the back of the right secondary timing chain shoe for a damaged, worn, or missing right secondary timing chain tensioner contact pad (1).
3. Replace a damaged right secondary timing chain shoe.

Primary Timing Chain Tensioner

1. Inspect the primary timing chain tensioner for worn primary timing chain tensioner shoe surface (1).
2. Inspect the primary timing chain tensioner for locked or binding timing chain tensioner. Reset the plunger (3) and ensure the plunger moves freely (2) in and out of the body of the tensioner. Refer to «Primary Camshaft Intermediate Drive Chain Tensioner Installation»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__primary-camshaft-intermediate-drive-chain-tensioner) .
3. Replace a damaged primary timing chain tensioner.

Left Secondary Timing Chain Tensioner

1. Inspect the left secondary timing chain tensioner for damaged plunger-to-shoe contact surface (1).
2. Inspect the left secondary timing chain tensioner for locked or binding timing chain tensioner. Reset the plunger (3) and ensure the plunger moves freely (2) in and out of the body of the tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Left Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Replace a damaged left secondary timing chain tensioner.

Right Secondary Timing Chain Tensioner

1. Inspect the right secondary timing chain tensioner for damaged plunger-to-shoe contact surface (1).
2. Inspect the right secondary timing chain tensioner for locked or binding timing chain tensioner. Reset the plunger (3) and ensure the plunger moves freely (2) in and out of the body of the tensioner. Refer to «Secondary Timing Chain Tensioner Installation - Right Side»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__secondary-timing-chain-tensioner-installation) .
3. Replace a damaged right secondary timing chain tensioner.

Oil Pump Disassemble

1. Remove the oil pump mounting bolts.
2. Remove the primary camshaft drive chain lower guide bolts.
3. Remove the primary camshaft drive chain lower guide.
4. Remove the bolts holding the oil pump cover to the oil pump housing.
5. Remove the oil pump cover from the oil pump housing.
6. Remove the inner oil pump drive gear.
7. Remove the outer oil pump driven gear.
8. Remove the clip, holding the cap, for the oil relief valve components.
9. Remove the cap, spring, and plunger from the oil pump housing.

1. Clean the oil pump components with non-corrosive solvent.
2. Dry the oil pump components with compressed air.

1. Inspect the oil pump housing for the following: Damage, scoring, or debris on the housing surface for the driven gear (1) Damage to the oil pump mounting bosses (2) Damage, scoring, or debris on the housing surface for the drive gear (3) Damage, scoring, or debris in the oil pump relief valve port (4) Damage, scoring, or debris in the oil pump intake port (5) Damage, scoring, or debris in the oil pump relief valve bore (6) Damage, scoring, or debris in the oil pump output port (7) Damage to the threads in the oil pump housing for the oil pump cover bolts (8)
2. Inspect the oil pump cover for the following conditions: Damage to the oil pump cover mounting bosses (1) Damage, scoring, or debris in the oil pump cover oil passages (2) Damage to the sealing surface between the oil pump cover and the oil pump housing (3)
3. Inspect the inner drive gear for damage. If inner diameter damage is found, ensure the crankshaft is also inspected.
4. Inspect the outer driven gear for damage.
5. Inspect the oil pump relief valve components for debris or damage.
6. Inspect the primary camshaft drive chain lower guide for damage (1-3).
7. If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.

Oil Filter Adapter Disassemble

1. Remove the oil pressure sender.
2. Remove the oil filter fitting.

1. Clean the oil filter adapter components with non-corrosive solvent.
2. Dry the oil filter adapter components with compressed air.

1. Inspect the oil filter adapter housing for cracks, casting imperfections or damage (1).
2. Inspect the threads for the oil pressure sender (2) or the bracket (6) for damage.
3. Inspect the oil filter sealing surface (3) for damage.
4. Inspect the threads for the oil filter fitting (4) for damage.
5. Inspect the mounting holes (5) for damage.
6. Inspect the oil filter adapter housing gasket sealing surface (1) for damage.
7. Inspect the oil filter adapter housing passages (2) for damage or blockage.
8. Repair or replace the oil filter adapter housing as necessary.

Oil Filter Adapter Assemble

1. Install the oil filter fitting and tighten to 50 N.m (37 lb ft).
2. Install the oil pressure sender and tighten to 20 N.m (15 lb ft).

Oil Pan Disassemble (LY7, LF1, LFW, or LFX)

1. Remove the oil pan scraper bolts (1).
2. Remove the oil pan scraper (2).
3. Remove the oil suction pipe bolts (1).
4. Remove the oil suction pipe (2).
5. Remove the oil suction pipe O-ring (1).
6. Remove the oil pan drain plug (1) and seal (2).

Oil Pan Cleaning and Inspection

Special Tools

EN 28410 Gasket Remover

For equivalent regional tools, refer to Special Tools

1. Remove any old thread sealant, gasket material or sealant using EN 28410 remover.
2. Clean the oil pan and oil pan components in solvent.
3. Clean out debris from the bolt holes.
4. Dry the oil pan and oil pan components with compressed air.

1. Inspect the exterior of the oil pan for the following conditions: Dents or damage to the exterior (2) Damage to the drain plug or drain plug hole (1) Damage to the transaxle brace mounting bosses (4) Damage to the transaxle mounting bosses (3)
2. Inspect the interior of the oil pan for the following conditions: Gouges or damage to the oil pan sealing surfaces (1) Damage to the oil pan scraper mounting holes (2) Damage to the bolt holes (3)
3. Repair or replace the oil pan and/or oil pan components as necessary.

1. Clean the oil pump pipe and screen with solvent.
2. Dry the oil pump pipe and screen with compressed air.

1. Inspect the mounting surface (1) for possible leakage paths.
2. Inspect the oil pump pipe tube (2) for cracks, imperfections and/or damage.
3. Inspect the oil pump pipe support bracket (3) for cracks or damage.
4. Inspect the oil pump screen (4) for blockage, foreign material, tears, cracks and/or damage.

Oil Pan Assemble (LY7, LF1, LFW, or LFX)

1. Install the oil pan drain plug (1) and NEW O-ring seal (2) and tighten to 25 N.m (18 lb ft).
2. Install the NEW oil suction pipe O-ring (1).
3. Install the oil suction pipe (2).
4. Install the oil suction pipe bolts (1) and tighten to 10 N.m (89 lb in).
5. Install the oil pan scraper (2).
6. Install the oil pan scraper bolts (1) and tighten to 10 N.m (89 lb in).

Engine Front Cover Disassemble

Special Tools

EN 45000 Seal Remover

For equivalent regional tools, refer to Special Tools

1. Remove the crankshaft front oil seal from the engine front cover using the EN 45000 remover.
2. Remove the camshaft position actuator valve oil seals from the engine front cover.
3. Remove the water pump seal from the engine front cover.
4. Discard the water pump seal.

Engine Front Cover Cleaning and Inspection

Special Tools

EN 28410 Gasket Remover

For equivalent regional tools, refer to Special Tools .

1. Remove any RTV sealant (1) from the engine front cover using EN 28410 remover.
2. Clean out debris from the bolt holes.
3. Clean the engine front cover in solvent.
4. Dry the engine front cover with compressed air.

1. Inspect the exterior of the engine front cover for the following conditions: Damage to the water pump bolt hole threads (7) Gouges or damage to the water pump sealing surfaces (6) Damage to the crankshaft front oil seal bore (5) Damage to the camshaft position actuator valve oil seal bores (1) Damage to the engine front cover bolt holes (2) Damage and/or corrosion to the engine coolant passage (3) Dents or damage to the exterior (4)
2. Inspect the interior of the engine front cover for the following conditions: Gouges or damage to the engine front cover sealing surfaces to the engine block (6), oil pan (4), and/or camshaft covers (2) Damage and/or corrosion to the engine coolant passage (5) Damage to the crankshaft front oil seal bore Gouges or damage to the O-ring sealing areas Gouges or damage to the water pump seal area (3) Damage to the engine front cover bolt holes (1)
3. Repair or replace the engine front cover as necessary.

Engine Front Cover Assemble

Special Tools

1. EN 29184 Oil Seal Installer
2. EN 46103 Camshaft Actuator Valve Seal Installer

For equivalent regional tools, refer to Special Tools .

1. Install the NEW crankshaft front oil seal into the engine front cover using the EN 29184 installer.
2. Place the seal into position with the notches (1) in the seal down. The notches (1) will face inboard when properly installed.
3. Install the NEW camshaft position actuator valve oil seals into the engine front cover using the EN 46103 installer.

Left Camshaft Cover

1. Remove and discard the left camshaft cover bolt grommets.
2. Remove the fuel injector sight shield ballstud.
3. Remove the oil fill cap.
4. Remove and discard the left camshaft cover gasket.
5. Remove and discard the left spark plug shield tube seals.

Right Camshaft Cover

1. Remove and discard the right camshaft cover bolt grommets.
2. Remove and discard the right camshaft cover gasket.
3. Remove and discard the right spark plug shield tube seals.

1. Clean the camshaft covers in solvent.
2. Dry the camshaft covers with compressed air.

1. Inspect each camshaft cover for the dents or damage to the exterior. A dented or damaged camshaft cover may: Leak engine oil Effect crankcase ventilation Interfere with the camshafts Interfere with the ignition coil sealing Allow water or condensation to enter the engine
2. Inspect the exterior of the left camshaft cover for the following conditions: Damage to the camshaft cover bolt holes (1) Damage to the oil fill hole (2) Damage to the mounting holes (3) for the ignition coil assembly and fuel injector sight shield ballstud. Damage to the positive crankcase ventilation (PCV) hose connector (4)-A damaged PCV hose connector is replaceable.
3. Inspect the interior of the left camshaft cover for the following conditions: Gouges or damage to the camshaft cover sealing groove (1) Damaged, loose or missing baffle fasteners (2) Damaged, loose or missing baffle (3) Gouges or damage to the spark plug shield seal bore (4) Restrictions to the ventilation system (5)
4. Inspect the exterior of the right camshaft cover for the following conditions: Damage to the PCV orifice (1)-A damaged PCV orifice can be replaced. Refer to «PCV Orifice Replacement»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-repair-instructions-off-vehicle__pcv-orifice-replacement) . Damage to the mounting holes (2) for the ignition coil assembly Damage to the camshaft cover bolt holes (3)
5. Inspect the interior of the right camshaft cover for the following conditions: Restrictions to the ventilation system (1) Gouges or damage to the spark plug shield seal bore (2) Gouges or damage to the camshaft cover sealing groove (3)
6. Repair or replace the camshaft cover or covers as necessary.

PCV Orifice Replacement

1. Remove the old PCV orifice by gripping the neck of the orifice with pliers and twisting and pulling out of the right camshaft cover.
2. Apply sealant to the NEW PCV orifice (1). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
3. Install the NEW PCV orifice into the right camshaft cover. After insertion, twist the PCV orifice in order to eliminate any vertical leak paths in the sealant.

PCV Fitting Replacement

1. Remove the old PCV fitting.
2. Install the new PCV fitting with a NEW O-ring.

Camshaft Cover Assemble

Special Tools

1. DT 5590 Bearing and Seal Driver
2. J-25254-A Oil Seal Installer

For equivalent regional tools, refer to Special Tools .

1. Install the NEW left spark plug shield tube seals using the DT 5590 driver (1) and J-25254-A installer (2).
2. Install the NEW left camshaft cover gasket.
3. Install the oil fill cap.
4. Install the fuel injector sight shield cover ballstud and tighten to 10 N.m (89 lb in).
5. Install the NEW left camshaft cover bolt grommets.

1. Install the NEW right spark plug shield tube coil seals using the DT 5590 driver (1) and J-25254-A installer (2).
2. Install the NEW right camshaft cover gasket.
3. Install the NEW right camshaft cover bolt grommets.

Intake Manifold Disassemble (LF1, LFW or LFX)

1. Remove the throttle body bolts (1).
2. Remove the throttle body (2).
3. Remove and discard the throttle body seal (3).
4. Loosen the evaporative (EVAP) solenoid bolt.
5. Remove the EVAP solenoid (1).
6. Remove the manifold absolute pressure (MAP) sensor bolt (1).
7. Remove the MAP sensor (2).
8. Remove the lower intake manifold bolts 1) and lower intake manifold (2).
9. Remove and discard the lower intake manifold gaskets (3).
10. Remove and discard the plastic compression limiters (1).

Intake Manifold Cleaning Procedure

1. Remove any remaining gasket and/or gasket material from the following: Throttle body Intake manifold
2. Clean the following intake manifold areas in solvent. Intake manifold gasket sealing areas Intake manifold passages Brake booster hose passage Evaporative emission (EVAP) solenoid passage Positive crankcase ventilation (PCV) vacuum hose passages
3. Dry the intake manifold and throttle body with compressed air.

1. Inspect the intake manifold for the following conditions: Damage to the throttle body bolt holes (1) Damage, debris or restrictions to the PCV system hose ports (3) Damage to the gasket sealing surface for the throttle body (2)
2. Inspect the intake manifold for the following conditions: Damage, debris or restrictions to the brake vacuum booster hose port (3) Damage to the intake manifold bolt bosses (1) Damage to the EVAP purge solenoid mounting boss (5) Damage, debris or restrictions to the EVAP purge solenoid port (4) Gouges or damage to the intake manifold sealing surfaces (2)
3. Inspect the intake manifold sealing surface (1) for warpage. Locate a straight edge across the intake manifold sealing surface. Insert a feeler gauge between the intake manifold and the straight edge. An intake manifold with warpage in excess of 0.50 mm (0.020 in) must be replaced.
4. Repair or replace the intake manifold as necessary.

Intake Manifold Assemble (LF1, LFW or LFX)

1. Install the NEW plastic compression limiters (1).
2. Install the NEW lower intake manifold gaskets (3).
3. Install the lower intake manifold (2) and bolts (1).
4. Tighten the lower intake manifold bolts (1) to 7 N.m (62 lb in).
5. Install the MAP sensor (2).
6. Install the MAP sensor bolt (1) and tighten to 4 N.m (35 lb in).
7. Install the EVAP solenoid (1).
8. Tighten the EVAP solenoid bolt to 10 N.m (89 lb in).
9. Install the NEW throttle body seal (3).
10. Install the throttle body (2).
11. Install the throttle body bolts (1) and tighten to 10 N.m (89 lb in).

1. Remove the old gasket material from the water pump sealing surfaces.
2. Clean all excess dirt and debris from the water pump housing.

1. Rotate the water pump hub (1). The water pump hub and impeller should turn straight and smoothly. If the hub wobbles, is noisy, or feels rough when rotated, replace the water pump.
2. Inspect the exterior of the water pump for the following: Damage to the water pump hub bolt threads (2) for the water pump pulley Damage to the water pump bolt holes (3)
3. Examine the water pump shaft (1) and the weep hole reservoir (2) in the water pump body for signs of leakage. If coolant leakage is evident, replace the water pump.
4. Inspect the interior of the water pump for the following: Damage to the water pump gasket sealing surface (1) Damage, corrosion or restrictions to the water pump impeller (2) Damage, corrosion or restrictions to the coolant passages (3)
5. Repair or replace the water pump as necessary.

Thread Repair

Special Tools

1. EN 42385-700 High Feature Thread Repair Kit
2. EN 42385-2000 Thread Insert Kit
3. EN 43965 Thread Repair Extension Kit

For equivalent regional tools, refer to Special Tools .

The thread repair process involves a solid, thin walled, self-locking, carbon steel, bushing type insert. During the insert installation process, the installation driver tool cold-rolls the bottom internal threads and expands the bottom external threads of the insert into the base material. This action mechanically locks the insert into place.

Scheme 110

The drill bit and counter bore tool from the tool kit EN 42385-700 kit and EN 42385-2000 insert kit is designed for use with either a suitable tap wrench or drill motor. Limited access and larger hole repair may process better using a tap wrench. An extension from kit EN 43965 extension kit may also be necessary to drive the thread repair tooling dependent on access to the hole being repaired. Use only a tap wrench when tapping the hole and during installation of the insert.

Scheme 111

It is critical that the drilling, counterboring and tapping of the hole to be repaired follows the same centerline as the original hole.

Scheme 112

During the drilling and tapping of the hole being repaired ensure the tooling is consistently machining perpendicular to the surface of the base material.

Scheme 113

If the threaded hole being repaired has a base surface perpendicular to the hole centerline, tapping guides are available to aid in tapping the hole.

Scheme 114

Note. The use of a cutting type fluid is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid. When installed to the proper depth, the flange (1) of the insert will be seated against the counterbore of the drilled/tapped hole and just below the surface (2) of the base material.

1. Drill out the threads of the damaged hole. Specifications 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 drilled hole to the full depth permitted by the tool (1).
4. Using compressed air, clean out any chips.
5. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only. Specifications 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 into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
8. Using compressed air, clean out any chips.
9. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
10. Install the insert (2) onto the driver installation tool (1).
11. Apply threadlock sealant, EN 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
12. Install the insert (2) into the tapped hole by hand only.
13. Install the insert until the flange (2) of the insert contacts the counterbored surface.
14. Continue to rotate the driver installation tool (1) through the insert (2).
15. Inspect the insert for proper installation into the tapped hole. A properly installed insert (1) will be either flush or slightly below flush with the surface of the base material (2).
16. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Scheme 115

Note. The use of a cutting type fluid, WD 40® or equivalent is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid. Do NOT remove the original stop collar from a counterbore drill.

When installed to the proper depth, the flange of the insert (1) will be seated against the counterbore (2) of the drilled/tapped hole.

1. Install a stop collar (2) on the counterbore drill (1), if required.
2. Drill out the threads of the damaged hole.
3. Using compressed air, clean out any chips.
4. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
5. Using compressed air, clean out any chips.
6. Spray cleaner into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
7. Using compressed air, clean out any chips.
8. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
9. Install the insert (2) onto the driver installation tool (1).
10. Apply threadlock sealant, EN 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
11. Install the insert (2) into the tapped hole by hand only.
12. Install the insert until the flange (2) of the insert contacts the counterbored surface.
13. Continue to rotate the driver installation tool (1) through the insert (2).
14. Inspect the insert (1) for proper installation (2) into the tapped hole.
15. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Tapered Pipe Thread Repair

The thread repair insert for tapered pipe threads is coated with a clear silver zinc coating.

Scheme 116

Note. The use of a cutting type fluid, WD 40® or equivalent is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid.

When installed to the proper depth, the flange (1) of the insert will be seated against surface (2) of the base material of the drilled/tapped hole.

1. Drill out the threads of the damaged hole.
2. Using compressed air, clean out any chips.
3. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
4. Tap the drilled hole until the threads at the top of the tap (2) are down to the surface of the base material.
5. Using compressed air, clean out any chips.
6. Spray cleaner into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
7. Using compressed air, clean out any chips.
8. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
9. Install the insert (2) onto the driver installation tool (1).
10. Apply threadlock sealant, EN 42385-109, LOCTITE 277® or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
11. Install the insert (2) into the tapped hole by hand only.
12. Install the insert until the flange of the insert (3) contacts the surface of the base material.
13. Continue to rotate the driver installation tool (1) until the top of the threaded section (2) is level with the top of the insert (3).
14. Inspect the insert (1) for proper installation (2) into the tapped hole.
15. Any installed insert that restricts or blocks an oil or engine coolant passage (3) will need to have the oil or engine coolant passage drilled out (4) to the original size of the oil or engine coolant passage. After drilling the restriction or blockage, clean out any chips and thread the installation driver tool through the insert again to remove any burrs caused by the drilling of the oil or engine coolant passage.

Cylinder Head Bolt Hole Thread Repair

Special Tools

1. EN 42385-700 High Feature Thread Repair Kit
2. EN 42385-2000 Thread Insert Kit

For equivalent regional tools, refer to Special Tools .

Scheme 117

The cylinder head bolt hole thread repair tooling are in the kits EN 42385-2000 insert kit and EN 42385-700 kit. The cylinder head bolt hole thread repair components consist of the following

1. EN 42385-723 Drill (1)
2. EN 42385-724 Tap (2)
3. EN 42385-725 Installation driver (3)
4. EN 42385-303 Alignment pin (4)
5. EN 42385-302 Bushing (5)
6. EN 42385-733 Bolts (6)
7. EN 42385-401 Fixture plate (7)

Note. Remove the fixture plate prior to installing the insert with the installer tool. The use of a cutting type fluid, WD 40®; or equivalent is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid.

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

1. Position the fixture plate (3) with the bushing (1) installed over the cylinder head bolt hole to be repaired (4).
2. Loosely install the fixture plate bolts (2) into the remaining cylinder head bolt holes.
3. Position the alignment pin (1) through the bushing and into the cylinder head bolt hole.
4. With the alignment pin in the desired cylinder head bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the cylinder head bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the cylinder head bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Remove the fixture plate bolts (2).
11. Remove the fixture plate (3) and bushing (1).
12. Using compressed air, clean out any chips.
13. Spray cleaner into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
14. Using compressed air, clean out any chips.
15. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
16. Install the insert (2) onto the driver installation tool (1).
17. Apply threadlock sealant, EN 42385-109, LOCTITE 277®; or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
18. Install the insert and installation driver (1) into the tapped hole by hand only.
19. Start the insert into the threaded hole.
20. Install the insert until the flange of the insert contacts the counterbored surface.
21. Continue to rotate the driver installation tool through the insert.
22. In order to completely form the new threads in the insert, rotate the driver installation tool through the insert until the mark (1) on the driver installation tool aligns with the surface of the engine block deck (2).
23. Inspect the insert for proper installation into the tapped hole.

Crankshaft Main Bolt Hole Thread Repair

Special Tools

1. EN 42385-700 High Feature Thread Repair Kit
2. EN 42385-2000 Thread Insert Kit

For equivalent regional tools, refer to Special Tools .

Scheme 118

Note. In order to repair some crankshaft main bolt holes it will be necessary to mount the fixture plate upside down. Do NOT remove the fixture plate prior to installing the insert with the installation driver. The fixture plate remains in position throughout the thread repair process.

The crankshaft main bearing bolt hole thread repair tooling are in the kits EN 42385-2000 insert kit and EN 42385-700 kit. The crankshaft main bearing bolt hole thread repair components consist of the following

1. EN 42385-702 Drill (1) for outboard holes
2. EN 42385-703 Tap (2) for outboard holes
3. EN 42385-704 Installation driver (3) for outboard holes
4. EN 42385-726 Bushing (4) for outboard holes
5. EN 42385-727 Alignment pin (5) for outboard holes
6. EN 42385-728 Bolts (6) for outboard holes
7. EN 42385-720 Drill (7) for inboard holes
8. EN 42385-721 Tap (8) for inboard holes
9. EN 42385-722 Installation driver (9) for inboard holes
10. EN 42385-713 Bushing (10)
11. EN 42385-308 Alignment pin (11)
12. EN 42385-734 Bolts (12)
13. EN 42385-712 Fixture plate (13)

Outboard Bolt Holes

Note. Ensure the fixture plate is installed during the machining and installation processes of the insert. The use of a cutting type fluid, WD 40® or equivalent is recommended when performing the drilling, counterboring and tapping procedures. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended cutting fluid.

When installed to the proper depth, the flange of the insert will be seated against the counterbore of the drilled/tapped hole.

1. Position the fixture plate (3) with the bushing (2) installed over the crankshaft main cap bolt hole to be repaired.
2. Loosely install the fixture plate bolts (1) into the remaining crankshaft main cap bolt holes.
3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Using compressed air, clean out any chips.
11. Spray cleaner into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
12. Using compressed air, clean out any chips.
13. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
14. Install the insert (2) onto the driver installation tool (1).
15. Apply threadlock sealant, EN 42385-109, LOCTITE 277®, or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
16. Install the insert and installation driver into the tapped hole by hand only.
17. Start the insert into the threaded hole.
18. Install the insert until the flange of the insert contacts the counterbored surface.
19. Continue to rotate the driver installation tool through the insert.
20. Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
21. Inspect the insert for proper installation into the tapped hole.
22. Remove the fixture plate bolts (1).
23. Remove the fixture plate (3) and bushing (2).

Inboard Bolt Holes

1. Position the fixture plate (3) with the bushing (1) installed over the crankshaft main cap bolt hole to be repaired.
2. Loosely install the fixture plate bolts (2) into the remaining crankshaft main cap bolt holes.
3. Position the alignment pin (1) through the bushing and into the crankshaft main cap bolt hole.
4. With the alignment pin in the desired crankshaft main cap bolt hole, tighten the fixture retaining bolts (2).
5. Remove the alignment pin (1) from the crankshaft main cap bolt hole.
6. Drill out the threads of the damaged hole.
7. Using compressed air, clean out any chips.
8. Using a suitable tapping wrench, tap the threads of the drilled hole by hand only.
9. In order to tap the new threads for the insert to the proper depth, rotate the tap into the crankshaft main cap bolt hole until the mark (3) on the tap aligns with the top of the drill bushing (2).
10. Using compressed air, clean out any chips.
11. Spray cleaner into the tapped hole. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended cleaner.
12. Using compressed air, clean out any chips.
13. Lubricate the threads of the driver installation tool (2) with the EN 42385-110 (1).
14. Install the insert (2) onto the driver installation tool (1).
15. Apply threadlock sealant, EN 42385-109, LOCTITE 277®, or equivalent (1) to the insert OD threads (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
16. Install the insert and installation driver into the tapped hole by hand only.
17. Start the insert into the threaded hole.
18. Install the insert until the flange of the insert contacts the counterbored surface.
19. Continue to rotate the driver installation tool through the insert.
20. Rotate the driver installation tool until the mark (3) on the driver installation tool aligns with the top of the drill bushing (2).
21. Inspect the insert for proper installation into the tapped hole.
22. Remove the fixture plate bolts (2).
23. Remove the fixture plate (3) and bushing (1).

Service Prior to Assembly

1. Dirt will cause premature wear of the rebuilt engine. Clean all the components.
2. Use the proper tools to measure the components when checking for excessive wear. Components not within the manufacturer's specification must be repaired or replaced.
3. When the components are reinstalled into an engine, return the components to their original location, position, and direction.
4. During assembly, lubricate all the moving parts with clean engine oil (unless otherwise specified). This will provide initial lubrication when the engine is first started.

Engine Block Assemble

1. Install the cylinder block-to-cylinder head alignment dowels.
2. Install the NEW front oil gallery expansion plug.
3. Ensure the NEW front oil gallery expansion plug is installed to the proper depth.
4. Install the cylinder block-to-transmission alignment dowels.
5. Apply the RTV sealant on the NEW coolant expansion plugs. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
6. Install the NEW coolant expansion plugs.
7. Ensure the NEW coolant expansion plugs are installed to the proper depth.
8. Apply thread sealant on the threads of the M20 left side oil gallery threaded plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
9. Install the M20 left side oil gallery threaded plug and tighten to 31 N.m (23 lb ft).
10. Apply thread sealant on the threads of the M14 left side coolant drain threaded plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
11. Install the M14 left side coolant drain threaded plug and tighten to 31 N.m (23 lb ft).
12. Apply thread sealant on the threads of the M14 rear oil gallery threaded plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
13. Install the M14 rear oil gallery threaded plug and tighten to 31 N.m (23 lb ft).
14. Apply thread sealant on the threads of the M14 right side coolant drain threaded plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
15. Install the M14 right side coolant drain threaded plug and tighten to 31 N.m (23 lb ft).
16. Apply thread sealant on the threads of the M14 right side oil gallery threaded plug. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
17. Install the M14 right side oil gallery threaded plug and tighten to 31 N.m (23 lb ft).
18. Install the cylinder block-to-oil pan alignment dowels.
19. Install the NEW right front oil pan rail oil gallery expansion plug.
20. Ensure the NEW right front oil pan rail oil gallery expansion plug is installed to the proper depth.
21. Install the oil jets.
22. Install the oil jet bolts and tighten to 10 N.m (89 lb in).
23. Install the NEW crankshaft position sensor O-ring, if damaged.
24. Install the crankshaft position sensor.
25. Install the crankshaft position sensor bolt and tighten to 10 N.m (89 lb in).
26. Install the left knock sensor to the cylinder block, as shown.
27. Install the left knock sensor bolt and tighten to 25 N.m (18 lb ft).
28. Ensure proper sensor orientation.
29. Install the right knock sensor to the cylinder block, as shown.
30. Install the right knock sensor bolt and tighten to 25 N.m (18 lb ft).
31. Ensure proper sensor orientation.
32. Install the block heater cartridge, if equipped.
33. Install the engine front cover studs (1) and tighten to 15 N.m (11 lb ft).

Crankshaft and Bearing Installation

Special Tools

1. GE 6125-1B Slide Hammer Adapter
2. EN 45059 Angle Meter
3. EN 49102 Crankshaft Bearing Cap Remover

For equivalent regional tools, refer to Special Tools .

Crankshaft Bearing Installation Procedure

1. Clean the crankcase crank bore with a lint-free cloth.
2. Clean all the oil from the backside of new bearing halves.
3. Install the new upper crankshaft bearings into position. The thrust bearing belongs in the number 3 journal. Ensure that the upper bearing insert contains the oil transfer hole and groove. Roll the bearing into position so that the lock tang engages the crank slot. The bearing must fit flush with the upper crankcase.
4. Install the new lower crankshaft bearings into position in the main bearing caps. The lower crankshaft bearings are identified by NO grooves or holes. The bearings must fit flush with the crankshaft bearing caps.

Crankshaft Installation Procedure

1. If removed, install the crankshaft key. Lightly tap the key in place with a small soft face, bronze/plastic, hammer until it bottoms in the keyway.
2. Gently lower the crankshaft into position in the cylinder block.

Crankshaft Bearing Clearance Measurement Procedure

1. Place a length of fresh, room temperature plastic gaging material all the way across all the crankshaft bearing journals.
2. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
3. Install the crankshaft main bearing caps.
4. Loosely install the original inner main cap bolts.
5. Loosely install the original outer main cap bolts.
6. Loosely install the original short/inner side main cap bolts.
7. Loosely install the original long/outer side main cap bolts.
8. Tap the crankshaft main bearing caps with a soft-faced hammer.
9. Tighten the main caps bolts using the EN 45059 meter in the following sequence
10. Tighten the inboard bolts (1-8) first, in two passes. Tighten the inboard bolts to 20 N.m (15 lb ft) on the first pass. Tighten the inboard bolts (1-8) an additional 80 degrees on the 2nd pass.
11. Tighten the outboard bolts (9-16) second, in two passes. Tighten the outboard bolts to 15 N.m (11 lb ft) on the first pass. Tighten the outboard bolts (9-16) an additional 110 degrees on the 2nd pass.
12. Tighten the short/inner bolts (17-20) third, in two passes. Tighten the short/inner bolts to 30 N.m (22 lb ft) on the first pass. Tighten the short/inner bolts (17-20) an additional 60 degrees on the 2nd pass.
13. Tighten the long/outer bolts (21-24) fourth, in two passes. Tighten the long/outer bolts to 30 N.m (22 lb ft) on the first pass. Tighten the long/outer bolts (21-24) an additional 60 degrees on the 2nd pass.
14. After reaching final torque, allow the assembly to sit for 2 minutes.
15. Remove the crankshaft bearing cap side bolts.
16. Remove the crankshaft bearing cap outer bolts.
17. Remove the crankshaft bearing cap inner bolts.
18. Remove the crankshaft bearing caps using the GE 6125-1B adapter and EN 49102 remover.
19. Determine the crankshaft bearing clearance by comparing the width of the flattened plastic gaging material at its widest point with the graduation on the gaging material container.
20. Compare your measurements with the «Engine Mechanical Specifications (LFX)»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__engine-mechanical-specifications-lfx) . If the new bearings do not provide the proper crankshaft to bearing clearance, inspect the following: Re-measure the crankshaft journals for the correct specified size and ensure the proper new bearings are being installed. If the crankshaft journals are incorrectly sized, replace or regrind the crankshaft. Crankshaft machining is permitted and undersized bearings are available. Re-measure the engine block crankshaft bearing bore diameter to ensure proper size. The engine block crankshaft bearing bore is not machinable and the block must be replaced if out of specification.
21. Clean the plastic gaging material from the crankshaft bearing journals with a soft, lint-free cloth.
22. Lift the crankshaft out of the cylinder block.
23. Apply a liberal amount of crankshaft prelube or clean engine oil to the upper and lower bearing surfaces. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
24. Gently lower the crankshaft into position in the cylinder block.
25. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
26. Install the crankshaft main bearing caps.
27. Loosely install the original inner main cap bolts.
28. Loosely install the NEW outer main cap bolts.
29. Tap the crankshaft main bearing caps with a soft-faced hammer.
30. Loosely install the NEW short/inner side main cap bolts.
31. Loosely install the NEW long/outer side main cap bolts.
32. Tighten the main cap bolts using the EN 45059 meter in the following sequence
33. Tighten the inboard bolts (1-8) first, in two passes. Tighten the inboard bolts to 20 N.m (15 lb ft) on the first pass. Tighten the inboard bolts (1-8) an additional 80 degrees on the 2nd pass.
34. Tighten the outboard bolts (9-16) second, in two passes. Tighten the outboard bolts to 15 N.m (11 lb ft) on the first pass. Tighten the outboard bolts (9-16) an additional 110 degrees on the 2nd pass.
35. Tighten the short/inner bolts (17-20) third, in two passes. Tighten the short/inner bolts to 30 N.m (22 lb ft) on the first pass. Tighten the short/inner bolts (17-20) an additional 60 degrees on the 2nd pass.
36. Tighten the long/outer bolts (21-24) fourth, in two passes. Tighten the long/outer bolts to 30 N.m (22 lb ft) on the first pass. Tighten the long/outer bolts (21-24) an additional 60 degrees on the 2nd pass.
37. Ensure that the crankshaft turns without binding or noise.

Piston, Connecting Rod, and Bearing Installation

Special Tools

1. EN 8037 Ring Compressor
2. EN 43690-A Rod Bearing Clearance Checking Tool
3. EN 45059 Angle Meter
4. EN 46121 Connecting Rod Guide Pin Set
5. EN 48589 Crankshaft Rotation Socket

For equivalent regional tools, refer to Special Tools .

Piston and Connecting Rod Assembly Procedure

1. Liberally lubricate the cylinder walls, piston rings and piston skirts with engine oil.
2. Select the correctly numbered piston/connecting rod assembly for the cylinder. A dot (1) showing proper piston orientation is located on the top of the piston.
3. Install the connecting rod bearing into the connecting rod.
4. Install the EN 46121 pin set into the connecting rod bolt holes.
5. Compress the piston rings using the EN 8037 compressor or equivalent.
6. Using both hands, slowly guide the piston and connecting rod assembly into the cylinder from the top and bottom of the cylinder. DO NOT allow the connecting rod to contact the cylinder wall.
7. When the EN 8037 compressor contacts the deck surface, gently tap the piston into the cylinder using the handle end of a dead-blow hammer. Guide the connecting rod onto the crankshaft bearing journal using the EN 46121 pin set while gently tapping the piston into the cylinder with a soft-blow hammer.
8. Remove the EN 46121 pin set from the connecting rod bolt holes.

Connecting Rod Bearing Clearance Measurement Procedure - Using Plastic Gaging

1. Place a length of fresh, room temperature plastic gaging material all the way across the connecting rod bearing journal.
2. Install the connecting rod bearing into the connecting rod cap.
3. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
4. Install the connecting rod bolts into the connecting rod cap and tighten the connecting rod bolts to 30 N.m (22 lb ft).
5. Loosen the connecting rod bolts until the torque reading is zero.
6. Re-tighten the connecting rod bolts. First Pass Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten the connecting rod bolts an additional 110 degrees using the EN 45059 meter.
7. Allow the assembly to sit for at least 2 minutes.
8. Remove the connecting rod cap bolts.
9. Remove the connecting rod cap.
10. Determine the connecting rod bearing clearance by comparing the width of the flattened plastic gaging material at its widest point with the graduation on the gaging material container.
11. Compare your measurements with the engine mechanical specifications. If the new bearings do not provide the proper crankshaft to connecting rod bearing clearance, inspect the following: Re-measure the crankshaft connecting rod journals for the correct specified size and ensure the proper new bearings are being installed. If the crankshaft connecting rod journals are incorrectly sized, replace or regrind the crankshaft. Crankshaft machining is permitted and undersized bearings are available. Re-measure the connecting rod bearing bore diameter to ensure proper size. The connecting rod is not machinable and the connecting rod must be replaced if out of specification.
12. Clean the plastic gaging material from the connecting rod bearing journals using a soft lint-free cloth.

Connecting Rod Bearing Clearance Measurement Procedure - Using EN 43690-A

The EN 43690-A checking tool has 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 119

EN 43690-A checking tool

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

Scheme 120

EN 43690-A adapter kit

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

1. Install the connecting rod bearing into the connecting rod cap.
2. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
3. Install the connecting rod bolts into the connecting rod cap and tighten the connecting rod bolts to 30 N.m (22 lb ft).
4. Loosen the connecting rod bolts until the torque reading is zero.
5. Re-tighten the connecting rod bolts. First Pass Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten the connecting rod bolts an additional 110 degrees using the EN 45059 meter.
6. Rotate the crankshaft until the crankshaft journal and the connecting rod to be measured is in the 12 o'clock position.
7. Remove the crankshaft main bolts required to install the retainer plate EN 43690-105.
8. Install the EN 43690-105 and crankshaft main bolts.
9. Loosen the connecting rod bolts until the torque reading is zero.
10. Re-tighten the connecting rod bolts. First Pass Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten the connecting rod bolts an additional 110 degrees using the EN 45059 meter.
11. During and after installation, ensure each piston is positioned properly in the correct cylinder. The locating arrow on the top of each piston must be pointing toward the front of the engine.
12. Repeat these procedures for the remaining piston/connecting rod assemblies using the EN-48589 socket in order to rotate the crankshaft.

Connecting Rod Final Assembly Procedure

1. Guide the connecting rod away from the crankshaft connecting rod journal in order to lubricate the crankshaft connecting rod bearing journal.
2. Apply a liberal amount of crankshaft prelube or clean engine oil to the crankshaft connecting rod bearing journal. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
3. Guide the connecting rod to the crankshaft connecting rod journal.
4. Install the connecting rod end cap on its original connecting rod and ensure the bearing lock tangs are aligned on the same side of the rod.
5. Install the NEW connecting rod bolts into the connecting rod cap and tighten the NEW connecting rod bolts to 30 N.m (22 lb ft).
6. Loosen the connecting rod bolts until the torque reading is zero.
7. Re-tighten the connecting rod bolts. First Pass Tighten the connecting rod bolts to 25 N.m (18 lb ft). Final Pass Tighten the connecting rod bolts an additional 110 degrees using the EN 45059 meter.
8. During and after installation, ensure each piston is positioned properly in the correct cylinder. The locating arrow on the top of each piston must be pointing toward the front of the engine.
9. Repeat these procedures for the remaining piston/connecting rod assemblies using the EN 45059 meter in order to rotate the crankshaft.

Crankshaft Rear Oil Seal and Housing Installation

Special Tools

1. EN-42183 Handle
2. EN-46109 Guide Pin Set
3. EN-47839 Crankshaft Rear Oil Seal Installation Tool

For equivalent regional tools, refer to Special Tools .

1. Install the 6 mm (0.236 in) guides from the EN-46109 pin set into the 2 crankshaft rear oil seal housing corner bolt holes of the engine block.
2. Install the EN-47839 tool with the EN-42183 handle (1, 2) onto the rear of the crankshaft flange.
3. Place a 3 mm (0.118 in) bead of RTV sealant to the NEW crankshaft rear oil seal housing as shown (1). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
4. Install the crankshaft rear oil seal housing to the engine block.
5. Remove the EN-46109 pin set 6 mm (0.236 in) guides from the engine block.
6. Install the crankshaft rear oil seal housing bolts.
7. Tighten the crankshaft rear oil seal housing bolts in sequence and tighten to 10 N.m (89 lb in).
8. Remove the EN-47839 tool and EN-42183 handle (1, 2) from the crankshaft flange.

Oil Pump Installation

1. Align the oil pump drive gear with the crankshaft flats and install the oil pump to the engine block.
2. Align the pump body with the mounting holes in the cylinder block.
3. Install the oil pump bolts and tighten to 25 N.m (18 lb ft).

Oil Pan Installation

1. Place a 3 mm (0.118 in) bead of RTV sealant on the block pan rail and the crankshaft rear oil seal housing (1). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
2. Position the oil pan (1) onto the block.
3. Loosely install the oil pan bolts (1) and (2).
4. Tighten the oil pan bolts in sequence shown. Tighten the 8 mm bolts (1-11) to 25 N.m (18 lb ft). Tighten the 6 mm bolts (12, 13) to 10 N.m (89 lb in).

Cylinder Head Installation - Right Side (LF1, LFW or LFX)

Special Tools

EN 45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW right cylinder head gasket (1) using the deck face locating pins for retention.
3. Align the right cylinder head (2) with the deck face locating pins.
4. Place the right cylinder head in position on the deck face.
5. Install the NEW M11 cylinder head bolts (1). Tighten the M11 cylinder head bolts a first pass in sequence to 30 (22 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 150 degrees using the EN 45059 meter.
6. Install the NEW M8 cylinder head bolt (2). Tighten the M8 cylinder head bolt a first pass to 15 (11 lb ft). Tighten the M8 cylinder head bolt a second pass an additional 75 degrees using the EN 45059 meter.

Valve Lifter Installation - Right Side

1. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended engine oil. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
2. Lubricate the SHLA bores in the cylinder head with clean engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended engine oil.
3. Install the SHLAs in the cylinder head.
4. Apply a liberal amount of lubricant to the SHLA pivot spheres. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.

Valve Rocker Arm Installation - Right Side

1. Apply a liberal amount of lubricant to the pivot pocket (1), roller (2) and valve slot (3) areas of the camshaft followers. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
2. Place the camshaft followers in position on the valve tip and stationary hydraulic lash adjuster (SHLA).
3. The rounded head end of the follower goes on the SHLA while the flat end goes on the valve tip.
4. Clean the camshaft journals and carriers with a clean, lint-free cloth.

Camshaft Installation - Right Side

1. Ensure that the camshaft sealing rings (1) are in place in the camshaft grooves. Camshaft sealing rings must be in place below the surface of the camshaft journal in order to avoid being pinched between the cylinder head and the camshaft caps.
2. Apply a liberal amount of lubricant to the camshaft journals and the right cylinder head camshaft carriers. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
3. Place the right intake and right exhaust camshafts in position in the right cylinder head.
4. Position the camshaft lobes in a neutral position with the flats on the back of the camshafts up and parallel (1) with the right cylinder head camshaft cover rail.
5. Observe the markings on the right cylinder head camshaft bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature (1) must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number 1, 3, 5 indicates the cylinder position from the front of the engine.
6. Apply a liberal amount of lubricant to the camshaft bearing caps. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
7. Apply a liberal amount of lubricant to the camshaft bearing cap (1) and camshaft thrust surface (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
8. Install the camshaft bearing thrust caps (1) in the first journal of the right cylinder head.
9. Install the remaining bearing caps (2) with their orientation mark toward the center of the cylinder head.
10. Hand start all the camshaft bearing cap bolts.
11. Tighten the camshaft bearing cap bolts in the sequence shown and tighten to 10 N.m (89 lb in).
12. Loosen the center intake camshaft bearing cap bolts (1, 2) and the center exhaust camshaft bearing cap bolts (3, 4).
13. Retighten the center camshaft bearing cap bolts (1, 2, 3, 4) and retighten the camshaft bearing cap bolts to 10 N.m (89 lb in).

Fuel Rail Installation

Refer to Cylinder Head Assemble (LF1, LFW or LFX) .

Cylinder Head Installation - Left Side (LF1, LFW or LFX)

Special Tools

EN 45059 Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Ensure the cylinder head locating pins are securely mounted in the cylinder block deck face.
2. Install a NEW left cylinder head gasket (1) using the deck face locating pins for retention.
3. Align the left cylinder head (3) with the deck face locating pins.
4. Place the left cylinder head in position on the deck face.
5. Install the NEW M11 cylinder head bolts (1). Tighten the M11 cylinder head bolts a first pass in sequence to 30 (22 lb ft). Tighten the M11 cylinder head bolts a second pass in sequence an additional 150 degrees using the EN 45059 meter.
6. Install the 2 NEW front M8 left cylinder head bolts (2). Tighten the M8 cylinder head bolts a first pass to 15 (11 lb ft). Tighten the M8 cylinder head bolts a second pass in sequence an additional 75 degrees using the EN 45059 meter.

Valve Lifter Installation - Left Side

1. Fill the stationary hydraulic lash adjuster (SHLA) with clean engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant. Take precautions to prevent scratching the pivot sphere area (1) of the SHLA.
2. Lubricate the SHLA bores in the cylinder head with clean engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
3. Install the SHLAs in the cylinder head.
4. Apply a liberal amount of lubricant to the SHLA pivot spheres. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.

Valve Rocker Arm Installation - Left Side

1. Apply a liberal amount of lubricant to the pivot pocket (1), roller (2) and valve slot (3) areas of the camshaft followers. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
2. Place the camshaft followers in position on the valve tip and stationary hydraulic lash adjuster (SHLA).
3. The rounded head end of the follower goes on the SHLA while the flat end goes on the valve tip.
4. Clean the camshaft journals and carriers with a clean, lint-free cloth.

Camshaft Installation - Left Side

1. Ensure that the camshaft sealing rings (1) are in place in the camshaft grooves. Camshaft sealing rings must be in place below the surface of the camshaft journal in order to avoid being pinched between the cylinder head and the camshaft caps.
2. Apply a liberal amount of lubricant to the camshaft journals and the left cylinder head camshaft carriers. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
3. Place the left intake and left exhaust camshafts in position in the left cylinder head.
4. Position the camshaft lobes in a neutral position with the flats on the back of the camshafts up and parallel (1) with the left cylinder head camshaft cover rail.
5. Observe the markings on the left cylinder head camshaft bearing caps. Each bearing cap is marked in order to identify its location. The markings have the following meanings: The raised feature (1) must always be oriented toward the center of the cylinder head. The I indicates the intake camshaft. The E indicates the exhaust camshaft. The number 2, 4, 6 indicates the cylinder position from the front of the engine.
6. Apply a liberal amount of lubricant to the camshaft bearing caps. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
7. Apply a liberal amount of lubricant to the camshaft bearing cap (1) and camshaft thrust surface (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
8. Install the camshaft bearing thrust cap (1) in the first journal of the left cylinder head.
9. Install the remaining bearing caps (2) with their orientation mark toward the center of the cylinder head.
10. Hand start all the camshaft bearing cap bolts.
11. Tighten the camshaft bearing cap bolts in the sequence shown and tighten to 10 N.m (89 lb in).
12. Loosen the center intake camshaft bearing cap bolts 1, 2 and the center exhaust camshaft bearing cap bolts 3, 4.
13. Retighten the center camshaft bearing cap bolts 1, 2, 3, 4 and retighten the camshaft bearing cap bolts to 10 N.m (89 lb in).

Fuel Pump Installation (LF1, LFW or LFX)

Special Tools

EN 48896 HP Fuel Pump Installation Alignment Gauge

For equivalent regional tools, refer to Special Tools .

1. Use the EN 48896 alignment gauge (2) to ensure that the camshaft lobe is in the base circle position. At base circle position, the tool will be flush with the head (1).
2. Lubricate the high pressure fuel pump cylinder head bore with 5W30 engine oil.
3. Lubricate the high pressure fuel pump roller lifter with 5W30 engine oil and install into the cylinder head bore.
4. Install a NEW high pressure fuel pressure fuel pump gasket (4).
5. Install a NEW high pressure fuel pump O-ring (5).
6. Install the valve lifter follower (3).
7. Install the high pressure fuel pump (2).
8. Start and hand-tighten the NEW high pressure fuel pump bolts (1) evenly and tighten the high pressure fuel pump bolts to 15 N.m (11 lb ft).
9. Install the NEW high pressure LH to RH fuel rail crossover pipe by starting all three fuel crossover pipe fitting nuts (1), (2) and (3) to finger-tight only.
10. Tighten the fuel rail crossover pipe fittings to 30 N.m (22 lb ft) in the following order: (1) Left Fuel Rail, (2) Right Fuel Rail, then (3) Fuel Pump.
11. Install the NEW fuel feed pipe (2) by installing the fuel line nut to the fuel pump finger-tight.
12. Install the right fuel feed pipe bolt finger tight (3).
13. Install the left fuel feed pipe bolt finger tight (1).
14. Tighten the left fuel feed pipe bolt (1) to 10 N.m (89 lb in).
15. Tighten the right fuel feed pipe bolt (3) to 10 N.m (89 lb in).
16. Tighten the fuel feed pipe fitting nut to 30 N.m (22 lb ft).
17. Install the fuel rail wiring connectors to the fuel feed pipe bracket.
18. Install the fuel rail noise shield (1).

Camshaft Position Actuator Installation - Right Side Intake

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "IN" marking (3). The marking is for an intake camshaft position actuator.
2. Ensure the proper camshaft position actuator is being installed. The reluctor wheel on the right intake camshaft position actuator (1) is indexed in a different position compared to the left intake camshaft position actuator (2).
3. On the right intake camshaft actuator the edge of the reluctor wheel (1) lines up with the valley (2) of the sprocket tooth.
4. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the triangle marking (2). The triangle marking is for alignment to the highlighted timing chain link on the right side of the engine.
5. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
6. Apply a liberal amount of lubricant to the back of the camshaft position actuator (1) and front of the camshaft bearing cap (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
7. Install the right intake camshaft position actuator (2).
8. Install the camshaft position actuator bolt (1) and tighten to 58 N.m (43 lb ft).

Camshaft Position Actuator Installation - Right Side Exhaust

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "EX" marking (1). The marking is for an exhaust camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the triangle marking (2). The marking is for alignment to the highlighted timing chain link on the right side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Apply a liberal amount of lubricant to the back of the camshaft position actuator (1) and front of the camshaft bearing cap (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
5. Install the right exhaust camshaft position actuator (2).
6. Install the camshaft position actuator bolt (1) and tighten to 58 N.m (43 lb ft).

Camshaft Position Actuator Installation - Left Side Intake

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "IN" marking (3). The marking is for an intake camshaft position actuator.
2. Ensure the proper camshaft position actuator is being installed. The reluctor wheel on the right intake camshaft position actuator (1) is indexed in a different position compared to the left intake camshaft position actuator (2).
3. On the left intake camshaft actuator the edge of the reluctor wheel (1) lines up with the peak (2) of the sprocket tooth.
4. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the circle marking (1). The circle marking is for alignment to the highlighted timing chain link on the left side of the engine.
5. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
6. Apply a liberal amount of lubricant to the back of the camshaft position actuator (1) and front of the camshaft bearing cap (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
7. Install the left intake camshaft position actuator (2).
8. Install the camshaft position actuator bolt (1) and tighten to 58 N.m (43 lb ft).

Camshaft Position Actuator Installation - Left Side Exhaust

1. Ensure the proper camshaft position actuator is installed. Observe the body of the camshaft position actuator for the "EX" marking (1). The marking is for an exhaust camshaft position actuator.
2. Ensure the proper timing mark is used. Observe the outer ring of the camshaft position actuator for the circle marking (3). The marking is for alignment to the highlighted timing chain link on the left side of the engine.
3. Use an open wrench on the hex cast into the camshaft in order to prevent camshaft rotation when tightening the camshaft position actuator bolt.
4. Apply a liberal amount of lubricant to the back of the camshaft position actuator (1) and front of the camshaft bearing cap (2). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended lubricant.
5. Install the left exhaust camshaft position actuator (2).
6. Install the camshaft position actuator bolt (1) and tighten to 58 N.m (43 lb ft).

Crankshaft Sprocket Installation

Special Tools

EN-48589 Crankshaft Rotation Socket

For equivalent regional tools, refer to Special Tools .

1. Ensure the crankshaft sprocket is installed with the timing mark (1) visible.
2. Install the crankshaft sprocket onto the nose of the crankshaft.
3. Align the notch in the crankshaft sprocket with the pin in the crankshaft.
4. Slide the crankshaft sprocket on the crankshaft nose until the crankshaft sprocket contacts the step in the crankshaft.
5. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN-48589 socket. Refer to «Timing Chain Alignment Diagram»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-timing-chain-alignment-routing-diagram) .

Timing Chain Idler Sprocket Installation - Left Side

1. Ensure that the left camshaft intermediate drive chain idler (2) is being installed. The recessed hub (3) and the larger sprocket of the left camshaft intermediate drive chain idler is installed outward. The raised hub and the smaller sprocket of the left camshaft intermediate drive chain idler is installed towards the block.
2. Place the left camshaft intermediate drive chain idler to the cylinder block.
3. Install the camshaft intermediate drive chain idler bolt and tighten to 58 N.m (43 lb ft).

Secondary Camshaft Intermediate Drive Chain Installation - Left Side

Special Tools

1. EN 48383 Camshaft Retaining Tools
2. EN 48589 Crankshaft Rotation Socket For equivalent regional tools, refer to «Special Tools»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-special-tools-and-equipment) .

1. Install the EN 48383-1 onto the rear of the left camshafts.
2. Ensure that the EN 48383-1 is fully seated onto the camshafts.
3. Ensure the crankshaft is in the stage one timing position with the crankshaft sprocket timing mark (1) aligned to the stage one timing mark on the oil pump cover (2) using the EN 48589 socket. Refer to «Timing Chain Alignment Diagram»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-timing-chain-alignment-routing-diagram) .
4. Install the left secondary camshaft drive chain.
5. Place the left secondary camshaft drive chain around the inner sprocket of the left camshaft intermediate drive chain idler with the timing camshaft drive chain link (1) aligned to the alignment access hole (2) made in the left camshaft intermediate drive chain idler outer sprocket.
6. Wrap the secondary camshaft drive chain around both left actuator drive sprockets.
7. Ensure there are 10 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.
8. Align the left exhaust camshaft position actuator sprocket alignment circle mark (2) with the timing camshaft drive chain link (1).
9. Align the left intake camshaft position actuator sprocket alignment circle mark (1) with the timing camshaft drive chain link (2).

Secondary Timing Chain Guide Installation - Left Side

1. Ensure that the left secondary camshaft drive chain guide (2) is being installed.
2. Position the left secondary camshaft drive chain guide.
3. Install the secondary camshaft drive chain guide bolts and tighten to 25 N.m (18 lb ft).

Secondary Camshaft Drive Chain Shoe Installation - Left Side

1. Ensure that the left secondary camshaft drive chain shoe (2) is being installed.
2. Position the left secondary camshaft drive chain shoe.
3. Install the secondary camshaft drive chain shoe bolt and tighten to 25 N.m (18 lb ft).

Secondary Timing Chain Tensioner Installation - Left Side

Special Tools

1. EN 45027 Tensioner Tool
2. EN 46112 Tensioner Retraction Pins

For equivalent regional tools, refer to Special Tools .

1. Ensure that the left secondary camshaft drive chain tensioner (2) is being installed.
2. Using the EN 45027 tool, reset the left secondary camshaft drive chain tensioner plunger.
3. Install the plunger into the left secondary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the left secondary camshaft drive chain tensioner by inserting the EN-46112 pins into the access hole in the side of the left secondary camshaft drive chain tensioner body.
5. Slowly release pressure on the left secondary camshaft drive chain tensioner. The left secondary camshaft drive chain tensioner should remain compressed.
6. Install a NEW left secondary camshaft drive chain tensioner gasket to the left secondary camshaft drive chain tensioner.
7. Install the left secondary camshaft drive chain tensioner bolts through the left secondary camshaft drive chain tensioner and gasket.
8. Ensure the left secondary camshaft drive chain tensioner mounting surface on the left cylinder head does not have any burrs or defects that would degrade the sealing of the NEW left secondary camshaft drive chain tensioner gasket.
9. Place the left secondary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the left secondary camshaft drive chain tensioner gasket tab (1). First Pass Tighten the left secondary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten the left secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
11. Release the left secondary camshaft drive chain tensioner by pulling out the EN 46112 pins and unlocking the tensioner plunger.
12. Verify the left secondary camshaft drive chain timing mark alignments by referring to «Timing Chain Alignment Diagram»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-timing-chain-alignment-routing-diagram) - Stage One.

Timing Chain Idler Sprocket Installation - Right Side

1. Ensure that the right camshaft intermediate drive chain idler (1) is being installed. The recessed hub (4) and the smaller sprocket of the right camshaft intermediate drive chain idler is installed outward. The raised hub and the larger sprocket of the right camshaft intermediate drive chain idler is installed towards the block.
2. Install the right camshaft intermediate drive chain idler.
3. Install the camshaft intermediate drive chain idler bolt and tighten to 58 N.m (43 lb ft).

Primary Camshaft Intermediate Drive Chain Installation

1. Install the primary camshaft drive chain.
2. Wrap the primary camshaft drive chain around the large sprockets of each camshaft intermediate drive chain idler and the crankshaft sprocket.
3. The left camshaft intermediate drive chain idler timing mark (1) will align with a timing camshaft drive chain link (2).
4. The right camshaft intermediate drive chain idler timing mark (2) will align with a timing camshaft drive chain link (1).
5. The crankshaft sprocket timing mark (2) will align with a timing camshaft drive chain link (1).
6. Ensure all the timing marks (2, 3, 6) are properly aligned with the timing camshaft drive chain links (1, 4, 5).

Primary Timing Chain Guide Installation - Lower

1. Position the primary camshaft drive chain lower guide to the oil pump.
2. Install the primary camshaft drive chain lower guide bolts and tighten to 25 N.m (18 lb ft).

Primary Timing Chain Guide Installation - Upper

1. Ensure the upper primary camshaft drive chain guide (3) is being installed.
2. Install the upper primary camshaft drive chain guides.
3. Install the upper primary camshaft drive chain guide bolts and tighten to 25 N.m (18 lb ft).

Primary Camshaft Intermediate Drive Chain Tensioner Installation

Special Tools

1. EN-45027 Tensioner Tool
2. EN-46112 Tensioner Retraction Pins
3. EN-48383 Camshaft Retaining Tools
4. EN-48589 Crankshaft Rotation Socket

For equivalent regional tools, refer to Special Tools .

1. Ensure that the primary camshaft drive chain tensioner (3) is being installed.
2. Using the EN-45027 tool, reset the primary camshaft drive chain tensioner plunger.
3. Install the plunger into the primary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the primary camshaft drive chain tensioner by inserting the EN-46112 pins into the access hole in the side of the primary camshaft drive chain tensioner body.
5. Slowly release pressure on the primary camshaft drive chain tensioner. The primary camshaft drive chain tensioner should remain compressed.
6. Install a NEW primary camshaft drive chain tensioner gasket to the primary camshaft drive chain tensioner.
7. Install the primary camshaft drive chain tensioner bolts through the primary camshaft drive chain tensioner and gasket.
8. Ensure the primary camshaft drive chain tensioner mounting surface on the engine block does not have any burrs or defects that would degrade the sealing of the NEW primary camshaft drive chain tensioner gasket.
9. Place the primary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the primary camshaft drive chain tensioner gasket tab (1). First Pass Tighten the primary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten the primary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
11. Release the primary camshaft drive chain tensioner by pulling out the EN-46112 pins and unlocking the tensioner plunger.
12. Verify the primary and left secondary camshaft drive chain timing mark alignments. Refer to «Timing Chain Alignment Diagram»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-timing-chain-alignment-routing-diagram) - Stage One.
13. Remove the EN 48383-1 from the rear of the left camshafts.
14. Using the EN-48589 socket, rotate the crankshaft and crankshaft sprocket from the stage 1 alignment position (1) to the stage 2 alignment position (2), 115 crankshaft degrees, in order to install the right secondary camshaft drive chain components.
15. Install the EN 48383-2 onto the rear of the left camshafts.
16. Install the EN 48383-3 onto the rear of the right camshafts.

Secondary Camshaft Intermediate Drive Chain Installation - Right Side

1. Ensure that the crankshaft is in the stage 2 timing drive assembly position (1).
2. Install the right secondary camshaft drive chain.
3. Place the secondary camshaft drive chain around the right camshaft intermediate drive chain idler outer sprocket, aligning the timing camshaft drive chain link (1) with the alignment access hole (2) made in the right camshaft intermediate drive chain idler inner sprocket.
4. Wrap the secondary camshaft drive chain around both right actuator drive sprockets.
5. Ensure there are 10 links (1) between the timing camshaft drive chain links for the camshaft position actuator sprockets.
6. Align the right exhaust camshaft position actuator sprocket alignment triangle mark (1) with the timing camshaft drive chain link (2).
7. Align the right intake camshaft position actuator sprocket alignment triangle mark (2) with the timing camshaft drive chain link (1).
8. There will be 22 links (1) between the right camshaft intermediate drive chain idler timing camshaft drive chain link and each right camshaft position actuator sprocket timing camshaft drive chain link.

Secondary Timing Chain Guide Installation - Right Side

1. Ensure that the right secondary camshaft drive chain guide (1) is being installed.
2. Position the right secondary camshaft drive chain guide.
3. Install the secondary camshaft drive chain guide bolts and tighten to 25 N.m (18 lb ft).

Secondary Camshaft Drive Chain Shoe Installation - Right Side

1. Ensure that the right secondary camshaft drive chain shoe (1) is being installed.
2. Position the right secondary camshaft drive chain shoe.
3. Install the secondary camshaft drive chain shoe bolt and tighten to 25 N.m (18 lb ft).

Secondary Timing Chain Tensioner Installation - Right Side

Special Tools

1. EN 45027 Tensioner Tool
2. EN 46112 Tensioner Retraction Pins

For equivalent regional tools, refer to Special Tools .

1. Ensure that the right secondary camshaft drive chain tensioner (1) is being installed.
2. Using the EN 45027 tool, reset the right secondary camshaft drive chain tensioner plunger.
3. Install the plunger into the right secondary camshaft drive chain tensioner body.
4. Compress the plunger into the body and lock the right secondary camshaft drive chain tensioner by inserting the EN 46112 pins into the access hole in the side of the right secondary camshaft drive chain tensioner body.
5. Slowly release pressure on the right secondary camshaft drive chain tensioner. The right secondary camshaft drive chain tensioner should remain compressed.
6. Install a NEW right secondary camshaft drive chain tensioner gasket to the right secondary camshaft drive chain tensioner.
7. Install the right secondary camshaft drive chain tensioner bolts through the right secondary camshaft drive chain tensioner and gasket.
8. Ensure the right secondary camshaft drive chain tensioner mounting surface on the right cylinder head does not have any burrs or defects that would degrade the sealing of the NEW right secondary camshaft drive chain tensioner gasket.
9. Place the right secondary camshaft drive chain tensioner into position and loosely install the bolts to the block.
10. Verify the proper placement of the right secondary camshaft drive chain tensioner gasket tab (1). First Pass Tighten the right secondary camshaft drive chain tensioner bolts to 5 N.m (44 lb in). Final Pass Tighten the right secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft).
11. Release the right camshaft drive chain tensioner by pulling out the EN 46112 pins and unlocking the tensioner plunger.
12. Verify all primary and secondary camshaft drive chain timing mark alignments. Refer to «Timing Chain Alignment Diagram»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-timing-chain-alignment-routing-diagram) - Stage Two.

Engine Front Cover Installation

Special Tools

EN 46109 Guide Pins

For equivalent regional tools, refer to Special Tools .

1. Install the 8 mm (0.315 in) guide from the EN 46109 pins into the cylinder block positions as shown.
2. Install the NEW engine front cover to cylinder block seal.
3. Apply a 3 mm (0.118 in) bead of RTV sealant on the engine front cover as shown (2). Apply a 5 mm (0.197 in) bead of RTV sealant on the engine front cover as shown (3). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
4. Place the engine front cover (1) onto the EN 46109 pins and slide into position.
5. Remove the EN 46109 pins from the cylinder block.
6. Hand start all the engine front cover bolts.
7. Tighten the engine front cover bolts (1-23) in the sequence shown to 20 N.m (15 lb ft). Tighten the engine front cover bolts (1-23) a second pass in sequence to 20 N.m (15 lb ft). Tighten the engine front cover bolts (1-23) a third pass in sequence an additional 60 degrees. Tighten the engine front cover bolts (24) to 15 N.m (11 lb ft). Tighten the engine front cover bolts (25) to 65 N.m (48 lb ft).
8. Place the camshaft position actuator valves (2) in position on the front cover.
9. Install the camshaft position actuator valve bolts (1) and tighten to 10 N.m (89 lb in).
10. Install NEW O-rings on the camshaft position sensor.
11. Place the camshaft position sensors (2) in position on the front cover.
12. Install the camshaft position sensor bolts (1) and tighten to 10 N.m (89 lb in).

Water Pump Installation

Special Tools

EN 46104 Water Pump Pulley Holding Tool

For equivalent regional tools, refer to Special Tools .

1. Ensure that the engine front cover and water pump are clear of old gasket material.
2. Ensure that the water pump mounting bolt holes in the front cover are completely clean and dry.
3. Place a NEW water pump gasket on the water pump.
4. Place the water pump in position on the front cover.
5. Install the NEW water pump bolts finger tight.
6. Tighten the NEW water pump bolts. Tighten the bolts a first pass in the sequence shown to 10 N.m (89 lb in). Tighten the bolts a second pass in the sequence shown to 10 N.m (89 lb in). Tighten the bolts a final pass in the sequence shown an additional 45 degrees.
7. Install the water pump pulley.
8. Loosely install the water pump pulley bolts.
9. Install the EN 46104 tool (1) onto the water pump pulley and tighten the water pump pulley bolts to 10 N.m (89 lb in).

Camshaft Cover Installation - Left Side

Special Tools

1. EN 46101 Spark Plug Tube Seal Guide
2. EN-48383 Camshaft Retaining Tools

For equivalent regional tools, refer to Special Tools .

1. Remove the EN 48383-2 from the rear of the left camshafts.
2. Install the EN 46101 guide onto the spark plug tubes of the left cylinder head.
3. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
4. Wipe the camshaft cover sealing surface on the left cylinder head with a clean, lint-free cloth.
5. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant on the engine front cover split lines (1). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
6. Place the left camshaft cover into position onto the left cylinder head.
7. Loosely install the left camshaft cover bolts.
8. Tighten the left camshaft cover bolts in the sequence shown. Tighten the left camshaft cover bolts in the sequence to 10 N.m (89 lb in). Tighten the left camshaft cover bolts a second pass in the sequence to 10 N.m (89 lb in).
9. Remove the EN 46101 guide from the spark plug tubes of the left cylinder head.
10. Install the NEW spark plugs into the left cylinder head and tighten to 18 N.m (13 lb ft).
11. Install the ignition coils.
12. Install the ignition coil bolts and tighten to 10 N.m (89 lb in).

Camshaft Cover Installation - Right Side

Special Tools

EN-46101 Spark Plug Tube Seal Guide

For equivalent regional tools, refer to Special Tools .

1. Install the EN-46101 guide onto the spark plug tubes of the right cylinder head.
2. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
3. Wipe the camshaft cover sealing surface on the right cylinder head with a clean, lint-free cloth.
4. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant on the engine front cover split lines (1). Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/buick/lacrosse/ii-2009-2013/remont/mechanical/#engine-mechanical-36l-specifications__adhesives-fluids-lubricants-and-sealers) for recommended sealant.
5. Place the right camshaft cover into position onto the right cylinder head.
6. Loosely install the right camshaft cover bolts.
7. Tighten the right camshaft cover bolts in the sequence shown. Tighten the right camshaft cover bolts to 10 N.m (89 lb in). Tighten the right camshaft cover bolts a second pass to 10 N.m (89 lb in).
8. Remove the EN-46101 guide from the spark plug tubes of the right cylinder head.
9. Install the NEW spark plugs into the right cylinder head and tighten to 18 N.m (13 lb ft).
10. Install the ignition coils.
11. Install the ignition coil bolts and tighten to 10 N.m (89 lb in).

Intake Manifold Installation (LF1, LFW or LFX)

1. Install the NEW intake manifold gasket (1).
2. Install the intake manifold assembly (2).
3. Install the intake manifold bolts (1).
4. Tighten the intake manifold bolts in the sequence shown.
5. Tighten the intake manifold bolts in sequence to 25 N.m (18 lb ft).
6. Tighten the intake manifold bolts a second pass in sequence to 25 N.m (18 lb ft).
7. Install the fuel pump cover (2).
8. Install the fuel pump cover bolt (1) and tighten to 10 N.m (89 lb in).
9. Connect the evaporative (EVAP) hose to the upper intake manifold and EVAP solenoid.
10. Connect the positive crankcase ventilation (PCV) tube assembly (1) to the upper intake manifold and the right camshaft cover.

Engine Flywheel Installation

Special Tools

1. EN 45059 Angle Meter
2. EN 46106 Engine Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools .

1. Place the engine flywheel in position on the crankshaft.
2. Install 2 NEW bolts in location at the top and bottom of the engine flywheel bolt pattern allowing the engine flywheel to hang in position.
3. Install the EN 46106 tool.
4. Install the remaining NEW engine flywheel bolts. Tighten the NEW engine flywheel bolts to 30 N.m (22 lb ft). Tighten the NEW engine flywheel bolts an additional 45 degrees using the EN 45059 meter.
5. Remove the EN 46106 tool.

Crankshaft Balancer Installation

Special Tools

1. EN 41998-B Crankshaft Balancer Installer
2. EN 45059 Angle Meter
3. EN 46106 Engine Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools .

1. The EN 46106 tool must be installed onto the flywheel.
2. Use the EN 41998-B installer, nut, bearing and washer to install the crankshaft balancer.
3. Apply lubricant to the inside of the crankshaft balancer hub bore.
4. Place the crankshaft balancer in position on the crankshaft.
5. Thread the EN 41998-B installer in the crankshaft. Ensure you engage at least 10 threads of the EN 41998-B installer before pressing the crankshaft balancer in place.
6. Push the crankshaft balancer into position by tightening the nut on the J 41998-B installer until the large washer bottoms out on the crankshaft end.
7. Remove the EN 41998-B installer.
8. Install the NEW crankshaft balancer bolt.
9. Tighten the crankshaft balancer bolt. Tighten the crankshaft balancer bolt to 100 N.m (74 lb ft). Tighten the crankshaft balancer bolt an additional 150 degrees using the EN 45059 meter.
10. Remove the EN 46106 tool.

Oil Filter Adapter Installation

1. Position a NEW oil filter adapter gasket onto the oil filter adapter.
2. Place the oil filter adapter into position.
3. Install the oil filter adapter bolts. Ensure the longer bolts (1) is installed in the upper rear position and tighten the oil filter adapter bolts to 25 N.m (18 lb ft).
4. Install a NEW oil filter.

Oil Level Indicator and Tube Installation (LF1, LFW or LFX)

1. Install a NEW O-ring on the oil level indicator tube.
2. Install the oil level indicator and tube (2) by sliding the tube down through the lower crankcase hole.
3. Install the oil level indicator tube bracket bolt (1) and tighten to 10 N.m (89 lb in).

Engine Coolant Thermostat Housing Installation

1. Install a NEW gasket onto the thermostat housing.
2. Install the thermostat housing.
3. Install the thermostat housing bolts. Ensure to install the short bolts (1) and the long bolt (2) in the proper position and tighten to 10 N.m (89 lb in).

Water Outlet Installation

1. Install the NEW water outlet seals (2) and (3).
2. Install the water outlet (1).
3. Install the water outlet bolts (4).

Drive Belt Tensioner Installation

1. Place the left drive belt tensioner assembly in position to the engine front cover.
2. Install the left drive belt tensioner bracket bolts and tighten to 25 N.m (18 lb ft).

Engine Prelubing

Note. This procedure is not used in Europe.

Special Tools

1. EN 21867-6 Oil Pressure Adapter Fitting
2. EN 45299 Engine Preluber

For equivalent regional tools, refer to Special Tools

1. Remove the oil filter cap.
2. Install the NEW oil filter cartridge.
3. Lubricate the threads of the oil filter cap with clean engine oil.
4. Install the oil filter cap and tighten to 25 N.m (18 lb ft).
5. Remove the oil pressure sending unit from the oil filter adapter.
6. Install the EN 21867-6 fitting.
7. Install the flexible hose to the adapter and open the valve.
8. Pump the handle on the EN 45299 preluber in order to flow a minimum of 1-1.9 liters (1-2 quarts) of engine oil. Observe the flow of engine oil through the flexible hose and into the engine assembly.
9. Close the valve and remove the flexible hose and adapter from the engine.
10. Install the oil pressure sending unit and tighten to 20 N.m (15 lb ft).
11. Top-off the engine oil to the proper level.

See also:
• Special Tools
• Torque Reaction Against Timing Drive Chain Caution
• Engine Mechanical Specifications (LFX)
• Safety Glasses Warning
• Thread Repair Specifications
• Adhesives, Fluids, Lubricants, and Sealers
• Fastener Caution
• Valve Lifter Priming Caution
• Timing Chain Alignment Diagram
• Cylinder Head Disassemble (LF1, LFW or LFX)
• Piston, Connecting Rod, and Bearing Cleaning and Inspection
• Thread Repair
• Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)
• Primary Camshaft Intermediate Drive Chain Tensioner Installation
• Secondary Timing Chain Tensioner Installation - Left Side
• PCV Orifice Replacement
• Cylinder Head Assemble (LF1, LFW or LFX)