Sealers, Adhesives, and Lubricants
| Application | Type of Material | GM Part Number | |
|---|---|---|---|
| United States | Canada | ||
| Sealing Cup Plug | Locktite 272T or Equivalent | 12345493 | 10953488 |
| Upper Oil Pan to Cylinder Block | Sealant | 97720043 | 88901148 |
| Flywheel Housing to Cylinder Block | Sealant | 97720043 | 88901148 |
| Engine Front Cover to Cylinder Block | Sealant | 97720043 | 88901148 |
| Lower Oil Pan to Upper Oil Pan | Sealant | 97720043 | 88901148 |
| Crankshaft Bearing Side Cap Bolts | Sealant | 12346004 | 10953480 |
| Intake Manifold to Cylinder Head | Sealant | 97720043 | 88901148 |
| Valve Rocker Arm Cover (Upper) | Sealant | 97720043 | 88901148 |
| Baffle Plate | Sealant | 97720043 | 88901148 |
| Camshaft Bearing | Engine Oil | 12345634 | 993297 |
| Rocker Arm Shaft | Engine Oil | 12345634 | 993297 |
| Valve Bridge Cap | Engine Oil | 12345634 | 993297 |
| Valve Stem Seal | Engine Oil | 12345634 | 993297 |
| Valve Lifter | Engine Oil | 12345634 | 993297 |
| Injector Sleeve | Locktite 272 or Equivalent | 12345493 | 10953488 |
| Piston Ring | Engine Oil | 12345634 | 993297 |
| Crankshaft Bearing | Engine Oil | 12345634 | 993297 |
| Connecting Rod Bearing | Engine Oil | 12345634 | 993297 |
| Thrust Bearing | Engine Oil | 12345634 | 993297 |
| Camshaft Bearing | Engine Oil | 12345634 | 993297 |
| Camshaft | Engine Oil | 12345634 | 993297 |
| Connecting Rod Small End Bushing | Engine Oil | 12345634 | 993297 |
| Push Rod | Engine Oil | 12345634 | 993297 |
| Crankshaft Bearing Cap Bolt | Molybdenum Disulfide | 1052948 | 992926 |
| Lithium Grease | Lubricant | 12346293 | |
| Parts Cleaner | Cleaner | 12377981 | 10953463 |
Sealers, Adhesives, and Lubricants
Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.
Base Engine Misfire without Internal Engine Noises
| Condition | Action |
|---|---|
| Abnormalities (severe cracking, bumps or missing areas) in the accessory drive belt. Also worn, damaged, or misaligned accessory drive components or excessive pulley runout. | Abnormalities in the accessory drive belt and/or components may cause engine RPM variations, noises similar to a faulty lower engine and also lead to a misfire condition. A misfire code may be present without an actual misfire condition. Inspect the accessory drive components. Repair or replace all damaged components. |
| Loose and/or damaged crankshaft balancer | A misfire code may be present without an actual misfire condition. Inspect crankshaft balancer and balancer bolt. Repair or replace all damaged components. |
| Loose torque converter bolts | A misfire code may be present without an actual misfire condition. Inspect torque converter bolts and flywheel. Repair or replace all damaged components. |
| Loose and/or damaged flywheel | A misfire code may be present without an actual misfire condition. Inspect flywheel and flywheel attaching bolts. Repair or replace all damaged components. |
| Restricted exhaust system | A severe restriction in the exhaust flow can cause significant loss of engine performance and may set a misfire code. Possible causes of restrictions include collapsed or dented pipes, plugged mufflers and/or catalytic converters. Repair or replace all damaged components. |
| Air in fuel system | Inspect fuel filter, fuel system for leaks and/or restrictions. Repair or replace all damaged components. |
| Bent and/or worn valve pushrod | Inspect valve pushrod and valve rocker arm. Repair or replace all damaged components. |
| Sticking valve | Carbon on the valve stem or valve seat may cause the valve to stick. Inspect valves and valve guides. Repair or replace all damaged components. |
| Damaged or misaligned timing gears | Inspect timing gears. Replace all damaged components. |
| Worn or faulty camshaft lobes | Inspect camshaft lobes. If damaged replace camshaft and all lifters. |
| Excessive piston-to-cylinder bore clearance | Perform cylinder leak down and compression tests. Inspect the piston, piston rings and cylinder bore. Repair or replace all damaged components. |
| Faulty cylinder head gaskets and/or cracking or other damage to the cylinder heads and engine block cooling system passages. (Coolant consumption may or may not cause the engine to overheat.) | Perform cylinder leak down and compression tests. Inspect the piston, piston rings and cylinder bore. Repair or replace all damaged components. |
| Overfilled Crankcase | Check engine oil level with vehicle on a level surface. Correct any overfilled condition. Inspect for fuel leaks into the crankcase. Refer to Fuel in Engine Oil . Repair any fuel leaks. |
Base Engine Misfire without Internal Engine Noises
Base Engine Misfire with Abnormal Internal Lower Engine Noises
| Condition | Action |
|---|---|
| Abnormalities (severe cracking, bumps or missing areas) in the accessory drive belt. | Abnormalities in the accessory drive belt and/or components may cause engine RPM variations, noises similar to a faulty lower engine and also lead to a misfire condition. A misfire code may be present without an actual misfire condition. Inspect the accessory drive components. Repair or replace all damaged components. |
| Worn, damaged, or misaligned accessory drive components or excessive pulley runout | A misfire code may be present without an actual misfire condition. Inspect the accessory drive components. Repair or replace all damaged components. |
| Loose and/or damaged crankshaft balancer | A misfire code may be present without an actual misfire condition. Inspect crankshaft balancer and balancer bolt. Repair or replace all damaged components. |
| Loose torque converter bolts | A misfire code may be present without an actual misfire condition. Inspect torque converter bolts and flywheel. Repair or replace all damaged components. |
| Loose and/or damaged flywheel | A misfire code may be present without an actual misfire condition. Inspect flywheel and flywheel attaching bolts. Repair or replace all damaged components. |
| Excessive piston-to-cylinder bore clearance | Perform cylinder leak down and compression tests Inspect the piston, piston rings and cylinder bore. Repair or replace all damaged components. |
| Excessive crankshaft thrust bearing clearance | Severely worn thrust surfaces on the crankshaft and/or thrust bearing may permit for and aft movement of the crankshaft and create a misfire code without an actual misfire condition. Inspect the crankshaft end play and crankshaft thrust bearings. Repair or replace all damaged components. |
| Overfilled crankcase | Check engine oil level with vehicle on a level surface. Correct any overfilled condition. Inspect for fuel leaks into the crankcase. Repair any fuel leaks. |
Base Engine Misfire with Abnormal Internal Lower Engine Noises
Base Engine Misfire with Coolant Consumption
| Inspection | Action |
|---|---|
| DEFINITION: Base engine misfire with coolant consumption | |
| Preliminary Inspection | Verify that there are no external coolant leaks. Refer to Loss of Coolant in Engine Cooling. |
| Isolate Affected Cylinders | Cylinder balance test with scan tool Cooling system pressurization Inspection of glow plugs Compression test Cylinder leakdown test |
| EGR System Inspection - if equipped | Inspect EGR valve and intake system for evidence of coolant leakage. Replace the EGR cooler if any problem is found. |
| Injector Tube Leakage | Remove the injectors and injector tubes of affected cylinders. Inspect for carbon tracking on the tapered seating surface of the cylinder head and the injector tube. If evidence of injector tube leakage is found, inspect the tapered sealing surface on the cylinder head and the injector tube for improper machining or debris. Clean debris and reassemble, or replace cylinder head or injector tube if necessary. |
| Cylinder Head Gasket Leakage | Remove cylinder heads of the affected cylinder bank and inspect for damage. Replace components as necessary. |
| Cylinder Head or Engine Block Damage | Inspect the cylinder heads for cracks and warpage. Inspect the cylinder block for damage. Inspect the cylinder block to head mating surface for staightness. Replace components as necessary. |
Base Engine Misfire with Coolant Consumption
Base Engine Misfire with Excessive Oil Consumption
| Condition | Action |
|---|---|
| Worn valve guides | Inspect the valves and valve guides. Repair or replace all damaged components. |
| Worn valve stem oil seals | Inspect the valve stem oil seals. Repair or replace all damaged components. |
| Excessive piston-to-cylinder bore clearance | Perform cylinder leak down and compression tests to determine the cause. Inspect the piston rings for low ring tension, broken or worn rings. Inspect cylinder bore. Repair or replace all damaged components. |
Base Engine Misfire with Excessive Oil Consumption
Engine Will Not Crank - Crankshaft Will Not Rotate
| Cause | Correction |
|---|---|
| Seized accessory drive system component | Remove accessory drive belt(s). Remove the glow plugs. Rotate crankshaft by hand at the balancer. |
| Hydraulically locked cylinder Coolant/antifreeze in cylinder Oil in cylinder Fuel in cylinder | Inspect for fluid at glow plug hole. Inspect for broken head gasket(s). Inspect for cracked engine block or cylinder head. Inspect for a sticking fuel injector. |
| Seized automatic transmission torque converter | Remove the engine assembly. The torque converter bolts are not accessible with the engine installed to the transmission. Rotate crankshaft by hand at the balancer or flywheel location. |
| Seized manual transmission | Disengage the clutch. Rotate crankshaft by hand at the balancer. Refer to Unit Repair Manual - Manual Transmission. |
| Material in cylinder: Broken valve Piston material Foreign material | Inspect cylinder for damaged components and/or foreign materials. Repair or replace as required. |
| Seized crankshaft or connecting rod bearings | Inspect crankshaft and connecting rod bearings. Repair as required. |
| Bent or broken connecting rod | Inspect connecting rods. Repair as required. |
| Broken crankshaft | Inspect crankshaft. Repair as required. |
Engine Will Not Crank - Crankshaft Will Not Rotate
Coolant in Combustion Chamber
| Inspection | Action |
|---|---|
| DEFINITION: Excessive white smoke and/or coolant type odor coming from the exhaust pipe may indicate coolant in the combustion chamber. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an "overtemperature" condition which may cause engine component damage. | |
| Preliminary Inspection | Verify that there are no external coolant leaks. Refer to Loss of Coolant in Engine Cooling. |
| Injector Tube Leakage | Clean contaminants Reseal injector tube Replace component as necessary. |
| Isolate Affected Cylinders | Cylinder balance test with scan tool Cooling system pressurization Inspection of glow plugs Compression test Cylinder leakdown test |
| EGR System Inspection (If equipped) | Inspect EGR valve and intake system for evidence of coolant leakage. Replace the EGR cooler if any problem is found. |
| Cylinder Head Gasket Leakage | Remove cylinder heads of the affected cylinder bank and inspect for damage. Replace components as necessary. |
| Cylinder Head or Engine Block Damage | Inspect the cylinder heads for cracks and warpage. Inspect the cylinder block for damage. Inspect the cylinder block to head mating surface for staightness. Replace components as necessary. |
Coolant in Combustion Chamber
Coolant in Engine Oil
| Cause | Correction |
|---|---|
| DEFINITION: Foamy or discolored oil or an engine oil "overfill" condition may indicate coolant entering the engine crankcase. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an "overtemperature" condition which may cause engine component damage. Contaminated engine oil and oil filter should be changed. Inspect the oil for excessive foaming or an overfill condition. Oil diluted by coolant may not properly lubricate the crankshaft bearings and may lead to component damage. Refer to Lower Engine Noise, Regardless of Engine Speed . Inspect by performing a Cylinder Leak-Down Test. During this test, excessive air bubbles within the cooling system may indicate a faulty gasket or damaged component. Inspect by performing a cylinder compression test. Two cylinders "side-by-side" on the engine block with low compression may indicate a failed cylinder head gasket. Refer to Engine Compression Test . | |
| Faulty cylinder head gasket | Replace the head gasket and components as required. Refer to Cylinder Head Cleaning and Inspection and Cylinder Head Replacement - Left or Cylinder Head Replacement - Right . |
| Warped cylinder head | Replace the cylinder head gasket. Refer to Cylinder Head Replacement - Left or Cylinder Head Replacement - Right . |
| Cracked cylinder head | Replace the cylinder head and gasket. |
| Cracked cylinder liner or engine block | Replace the components as required. |
| Cylinder head, block, or manifold porosity | Replace the components as required. |
| Leaking engine oil cooler | Replace components as required. |
| Damaged injector tube or O-Ring | Replace components as required. |
| Faulty water pump | Replace components as required. |
Coolant in Engine Oil
Fuel in Engine Oil
Definition: Fuel Dilution of the engine oil due to fuel leaks under the valve cover area. In severe cases, fuel/oil leakage may be seen from the PCV system vent hose and engine roughness or vibration may occur. If fuel is suspected of leaking into the crankcase, the following procedure should be performed to verify the condition.
- Remove the oil level indicator and allow oil to drop onto a clean white paper towel.
- If the oil is diluted with fuel, it will become apparent as the towel wicks the fuel away from the drop of oil on the towel. The fuel will expand out in a ring around the oil droplet.
- If fuel dilution is apparent, refer to «Fuel Leaks (Outside of Engine)»(ref-184194-S03933432152005082200000) or «Fuel Leaks (Inside of Engine)»(ref-184194-S09618419462005082200000) in engine controls, for diagnosis and repair. After repairs are completed, perform the test again to verify the condition is corrected.
- If no fuel dilution is present, verify the oil level and correct as needed.
Turbocharger Oil Leak From Compressor Seal
| Condition | Action |
|---|---|
| Restricted air system | Inspect for clogged air filter element or restricted air inlet system. |
| Restricted exhaust system | Inspect for a restricted exhaust. |
| Leaking exhaust system. | Inspect for exhaust manifold leaks. |
| Poor oil drainage from turbocharger | Inspect for restricted turbocharger oil drain pipe. |
| Restricted crankcase ventilation system | Inspect for restricted crankcase ventilation system. |
| Worn internal engine components | Inspect for excessive blowby or engine oil consumption. |
Turbocharger Oil Leak From Compressor Seal
Turbocharger Oil Leak From Turbine Seal
| Condition | Action |
|---|---|
| Poor oil drainage from turbocharger | Inspect for a restricted turbocharger oil drain pipe. |
| Restricted crankcase ventilation system | Inspect for a restricted crankcase ventilation system. |
| Worn internal engine components | Inspect for excessive blowby or engine oil consumption. |
Turbocharger Oil Leak From Turbine Seal
Turbocharger Lack of Oil Supply
| Condition | Action |
|---|---|
| Restricted oil supply hose | Inspect for restricted turbocharger oil supply hose. |
| Spun camshaft bearing | Remove the oil supply hose. Refer to Turbocharger Oil Supply Hose Replacement . Visually inspect for correct alignment of the camshaft bearing oil hole. Rotate the engine 1/2 turn and inspect the camshaft bearing oil hole for movement, indicating a spun camshaft bearing. |
Turbocharger Lack of Oil Supply
Upper Oil Pan
A single piece cast aluminum upper oil pan contributes to crankshaft and block rigidity while reducing overall weight.
Crankshaft
The crankshaft is a nitride hardened steel design with five main bearings. Crankshaft thrust is controlled by the number 5 bearing.
Connecting Rods
The connecting rods are one-piece hot forged steel. The connecting rods and caps are of a fractured split design to improve durability and reduce internal friction. The connecting rod small end is tapered cut for reduced weight and improved durability.
Pistons
The pistons are a full-floating design. The piston pins are a slip fit in the bronze bushed connecting rod and are retained in the piston by round wire retainers. The pistons have a piston cooling oil channel cast inside of the piston. These cooling oil channels utilize an oil jet located at the bottom of the cylinder bore to direct oil into the piston channel. There are two compression rings and one oil control ring. There is a groove machined into the pistons between the first and second compression rings. This groove reduces compression ring leakage by providing an empty space for expanding gases, reducing the combustion gas pressure on the second compression ring.
Cylinder Heads
The cylinder heads are made of aluminum for lighter weight and rapid heat dissipation. There are 4 valves per cylinder and the ports are of a high swirl design for improved combustion. The cylinder head gaskets consist of an all steel laminated construction.
Valve Train
The engine utilizes a mechanical roller lifter for valve operation. The shaft mounted rocker arms have roller tips for reduced friction and wear. One rocker arm operates two valves simultaneously through a valve bridge.
Fuel System
The fuel system is of a direct injection fuel rail design. A high pressure pump mounted within the valley is gear driven directly from the camshaft. This pump provides a continuous and constant high pressure fuel supply to the fuel rails. The electronically controlled fuel injectors receive their fuel supply from these fuel rails. The fuel injection control utilizes a pilot injection method to reduce the combustion noise that is common in traditional diesel engines. The pilot injection method reduces noise by supplying a small amount of fuel to the cylinder just before the normal combustion timing.
Fuel Injection Control Module
The fuel injection control module is mounted on the right front valve rocker arm cover. It is fuel cooled.
Turbocharger
The turbocharger is water cooled for improved durability.
Oil Cooler
The oil cooler lowers engine temperature by cooling the oil with engine coolant. Engine coolant is directed from the water pump to the oil cooler by a coolant tube. The oil filter attaches directly to the oil cooler.
Oil Pump
The oil pump is gear driven directly from the crankshaft. The oil pump drive gear is a slip fit to the crankshaft.
Water Pump
The water pump is gear driven for improved reliability.
Engine Covers
There is a front engine cover and a flywheel housing, both are made of aluminum. The full bell flywheel housing is cross bolted to the upper oil pan. The flywheel housing also supplies a crossover passage for engine coolant. The front engine cover houses the gear train and provides a mounting surface for the cooling fan pulley assembly.
Scheme 167
Engine lubrication is supplied by a gear type oil pump assembly. The pump is mounted on the front of the engine block and driven by the oil pump drive gear on the crankshaft. The pump gears rotate and draw oil from the oil pan sump through a pick-up screen and pipe. The oil is pressurized as it passes through the pump and is sent through the engine block oil galleries. Contained within the oil pump assembly is a safety relief valve that eliminates over-pressurization. Pressurized oil is directed through the sub oil gallery (5) to the full flow oil filter where harmful contaminants are removed. Two bypass valves are incorporated into the oil cooler assembly which will permit oil flow in the event the filter or the oil cooler become restricted.
The oil is directed to the main oil gallery (4), and from the main oil gallery it flows to the piston cooling channel left bank (3), and the sub oil gallery (6) on the right bank. The sub oil gallery on the right bank supplies oil to the right bank piston cooling channel (1). Located in the front cover at the sub oil gallery (6) is an oil pressure relief valve which regulates oil pressure within operating range.
Oil flows from the main gallery (4) to the vertical crankshaft/camshaft bearing galleries (2). From the crankshaft/camshaft bearing galleries (2), the oil flows to both the camshaft bearings and the crankshaft main bearings. Oil flows from the crankshaft main bearings to the connecting rod big end.
Oil flows from the crankshaft/camshaft bearing galleries (2) to the number 1 camshaft bearing (7), where it splash lubricates the fuel injection pump gear.
Oil flows from the crankshaft/camshaft bearing galleries (2) to the number 2 and 5 camshaft bearings (8).
Oil flows from the crankshaft/camshaft bearing galleries (2) to the number 3 camshaft bearing (9), where it exits to both cylinder heads and enters the hollow rocker arm shafts. Oil flows through the rocker arm shafts and rocker arms where it lubricates the upper valve train components. Oil also flows through the rocker arms, through the passage in the valve adjusting screw, and into the hollow pushrods where it is directed to the valve lifters.
Oil flows from the crankshaft/camshaft bearing galleries (2) to the number 4 camshaft (10), where it exits into the turbocharger oil supply line to lubricate the turbocharger. Oil exiting the turbocharger is routed through the turbocharger oil return pipe and into the flywheel housing.
Cleanliness and Care
An automobile engine is a combination of many of the following surfaces
- Machined
- Honed
- Polished
- Lapped
The tolerances of these surfaces are measured in the ten-thousandths of an inch. When you service any internal engine part, cleanliness and care are important. Apply a liberal coating of engine oil to the friction areas during assembly in order to protect and lubricate the surfaces on initial operation. Throughout this section, practice proper cleaning and protection procedures to the machined surfaces and to the friction areas.
Note. Engine damage may result if an abrasive paper, pad, or motorized wire brush is used to clean any engine gasket surfaces.
Whenever you remove the valve train components, keep the components in order. Follow this procedure in order to install the components in the same locations and with the same mating surfaces as when removed.
| CAUTION | Refer to Battery Disconnect Caution in Cautions and Notices. |
Disconnect the negative battery cables before you perform any major work on the engine. For more information on the disconnection of the battery, refer to Engine Electrical.
Separating Parts
| IMPORTANT | Many internal engine components will develop specific wear patterns on their friction surfaces. When disassembling the engine, internal components MUST be separated, marked, or organized in a way to ensure reinstallation to their original location and position. |
Separate, mark, or organize the following components
- Piston and the piston pin
- Piston to the specific cylinder bore
- Piston rings to the piston
- Connecting rod to the crankshaft journal
- Connecting rod to the bearing cap A paint stick or etching/engraving type tool are recommended. Stamping the connecting rod or cap near the bearing bore may affect component geometry.
- Crankshaft main and connecting rod bearings
- Camshaft and valve lifters
- Valve lifters, guides, pushrods, pivot supports and rocker arms
- Valve to the valve guide
- Valve spring and shim to the cylinder head location
- Engine block main bearing cap location and direction
- Oil pump drive and driven gears
Gasket Reuse and Applying Sealant
- Do not reuse any gasket unless specified.
- Gaskets that can be reused will be identified in the service procedure.
- Do not apply sealant to any gasket or sealing surface unless specified in the service procedure.
Separating Components
- Use a rubber mallet in order to separate the components.
- Bump the part sideways in order to loosen the components.
- Bumping of the component should be done at bends or reinforced areas of the component to prevent distortion of the components.
Sealant Types
| IMPORTANT | The correct sealant and amount of sealant must be used in the proper location to prevent oil leaks, coolant leaks, or the loosening of the fasteners. DO NOT interchange the sealants. Use only the sealant (or equivalent) as specified in the service procedure. |
The following 2 major types of sealant are commonly used in engines
- Aerobic sealant (Room Temperature Vulcanizing (RTV))
- Anaerobic sealant, which include the following: Gasket eliminator Pipe Threadlock
Aerobic Type Room Temperature Vulcanizing (RTV) Sealant
Aerobic type Room Temperature Vulcanizing (RTV) sealant cures when exposed to air. This type of sealant is used where 2 components (such as the intake manifold and the engine block) are assembled together.
Use the following information when using RTV sealant
- Do not use RTV sealant in areas where extreme temperatures are expected. These areas include: The exhaust manifold The head gasket Any other surfaces where a different type of sealant is specified in the service procedure
- Always follow all the safety recommendations and the directions that are on the RTV sealant container.
- Use a plastic or wood scraper in order to remove all the RTV sealant from the components.
- The surfaces to be sealed must be clean and dry.
- Use a RTV sealant bead size as specified in the service procedure.
- Apply the RTV sealant bead to the inside of any bolt holes areas.
- Assemble the components while the RTV sealant is still wet to the touch (within 3 minutes). Do not wait for the RTV sealant to skin over.
- Tighten the fasteners in sequence (if specified) and to the proper torque specifications. DO NOT overtighten the fasteners.
Anaerobic Type Gasket Eliminator Sealant
Anaerobic type gasket eliminator sealant cures in the absence of air. This type of sealant is used where 2 rigid parts (such as castings) are assembled together. When 2 rigid parts are disassembled and no sealant or gasket is readily noticeable, then the 2 parts were probably assembled using an anaerobic type gasket eliminator sealant.
Use the following information when using gasket eliminator sealant
- Always follow all the safety recommendations and directions that are on the gasket eliminator sealant container.
- Apply a continuous bead of gasket eliminator sealant to one flange. The surfaces to be sealed must be clean and dry.
- Apply the gasket eliminator sealant evenly to get a uniform thickness of the gasket eliminator sealant on the sealing surface.
- Tighten the fasteners in sequence (if specified) and to the proper torque specifications. DO NOT overtighten the fasteners.
- After properly tightening the fasteners, remove the excess gasket eliminator sealant from the outside of the joint.
Anaerobic Type Threadlock Sealant
Anaerobic type threadlock sealant cures in the absence of air. This type of sealant is used for threadlocking and sealing of bolts, fittings, nuts, and studs. This type of sealant cures only when confined between 2 close fitting metal surfaces.
Use the following information when using threadlock sealant
- Always follow all safety recommendations and directions that are on the threadlock sealant container.
- The threaded surfaces to be sealed must be clean and dry.
- Apply the threadlock sealant as specified on the threadlock sealant container.
- Tighten the fasteners in sequence (if specified) and to the proper torque specifications. DO NOT overtighten the fasteners.
Anaerobic Type Pipe Sealant
Anaerobic type pipe sealant cures in the absence of air and remains pliable when cured. This type of sealant is used where 2 parts are assembled together and require a leak proof joint.
Use the following information when using pipe sealant
- Do not use pipe sealant in areas where extreme temperatures are expected. These areas include: The exhaust manifold The head gasket Surfaces where a different sealant is specified
- Always follow all the safety recommendations and the directions that are on the pipe sealant container.
- The surfaces to be sealed must be clean and dry.
- Use a pipe sealant bead of the size or quantity as specified in the service procedure.
- Apply the pipe sealant bead to the inside of any bolt hole areas.
- Apply a continuous bead of pipe sealant to 1 sealing surface.
- Tighten the fasteners in sequence (if specified) and to the proper torque specifications. DO NOT overtighten the fasteners.
Tools and Equipment
- Special tools are listed and illustrated throughout this section with a complete listing at the end of the section. These tools or their equivalents, are specially designed to quickly and safely accomplish the operations for which they are intended. The use of these special tools will also minimize possible damage to engine components. Some precision measuring tools are required for inspection of certain critical components. Torque wrenches and a torque angle meter are necessary for the proper tightening of various fasteners.
- To properly service the engine assembly, the following items should be readily available: Approved eye protection and safety gloves A clean, well-lit, work area A suitable parts cleaning tank A compressed air supply Trays or storage containers to keep parts and fasteners organized An adequate set of hand tools Approved engine repair stand An approved engine lifting device that will adequately support the weight of the components