Engine Assembly
CAUTION:
During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces that enters the oil passages, coolant passages or the oil pan, can cause engine failure.
CAUTION:
The moving components must be lubricated with clean engine oil before assembly.
CAUTION:
The components with oil holes must be correctly aligned with the oil feed holes.
NOTE:
For additional information, refer to the exploded views under DESCRIPTION AND OPERATION .
- If necessary, install the following:
- Cylinder block dowels
- Oil gallery plugs
- Water jacket plugs
- Using the Camshaft Service Set, install the engine dynamic balance shaft bearings.
- Using the Camshaft Service Set, install the camshaft bearings.
- Install the following:
- Engine dynamic balance shaft bearing cover
- Camshaft bearing cover
- If equipped, install the block heater.
- Tighten to 2 Nm (18 lb-in).
- Install the crankshaft upper main bearings and the crankshaft upper thrust main bearing.
- Position the crankshaft.
- Clean the rear main bearing cap sealing area with metal surface cleaner. Apply silicone gasket and sealant to the rear main bearing cap-to-cylinder block parting line.
- Install the main bearing caps. Tighten the bolts in 2 stages.
- Stage 1: Tighten to 55 Nm (41 lb-ft).
- Stage 2: Rotate an additional 90 degrees.
- Using a piston ring compressor, compress the piston rings.
- Install the piston with the arrow on the piston face pointing toward the front of the engine.
- Position the lower connecting rod bearing and the connecting rod cap on the connecting rod and the crankshaft journal.
- Tighten the connecting rod cap bolts in 3 stages.
- Stage 1: Tighten to 25 Nm (18 lb-ft).
- Stage 2: Tighten to 45 Nm (33 lb-ft).
- Stage 3: Tighten an additional 105 degrees.
- Install the remaining pistons and the connecting rods.
- Install the oil pan baffle and the retaining nuts.
- Tighten to 32 Nm (24 lb-ft).
- Using a new gasket, install the oil pump screen cover and tube.
- Tighten to 25 Nm (18 lb-ft).
- Tighten to 32 Nm (24 lb-ft).
- Install the camshaft, camshaft spacer and camshaft key.
- Install the camshaft thrust plate and bolts.
- Tighten to 11 Nm (8 lb-ft).
- Install the engine dynamic balance shaft assembly and bolts.
- Tighten to 11 Nm (8 lb-ft).
- Install the engine balance shaft drive gear so that the timing mark lines up with the timing mark on the engine balance shaft driven gear.
- Install the valve tappets.
- Install the valve tappets.
- Install the tappet guide plates and retainers.
- Install the bolts and tighten to 12 Nm (9 lb-ft).
- Install the timing chain tensioner and bolts.
- Position the timing chain tensioner.
- Install the bolts and tighten to 11 Nm (8 lb-ft).
- If necessary, compress the tensioner pad and install a retaining pin.
- Rotate the crankshaft so the number 1 piston is at top dead center (TDC) and the keyway is at the 12 o'clock position.
- Turn the camshaft sprocket so that the keyway is on the bottom of the camshaft.
- Install the timing chain, the camshaft sprocket and the crankshaft sprocket as an assembly.
- Make sure the timing marks and the keyways are aligned.
- Remove the retaining pin.
- Install the synchronizer drive gear and the bolt.
- Tighten to 45 Nm (33 lb-ft).
- Install the engine front cover studs in their original locations.
- Tighten the engine front cover studs to 7 Nm (62 lb-in).
- Using a new gasket, install the engine front cover.
- Using a new gasket, install the coolant pump.
- Tighten the fasteners in the sequence shown in illustration.
- Tighten capscrew No. 12 to 10 Nm (89 lb-in).
- Tighten all other fasteners to 28 Nm (21 lb-ft).
- Clean and inspect the mating surface.
- Assemble the special tools, then place the crankshaft front seal onto the special tools.
- Using the special tools, install the crankshaft front seal.
- Apply a bead of Silicone Gasket and Sealant to the keyway in the crankshaft damper. Using the special tool, position and install the crankshaft damper.
- Install the crankshaft pulley bolt.
- Tighten to 160 Nm (118 lb-ft).
- Install the special tool on the camshaft synchronizer by rotating the tool until it engages the notch in the camshaft synchronizer housing.
- Install the camshaft synchronizer housing assembly so the arrow on the synchronizer alignment tool is 54 degrees from the centerline of the engine.
- Install the camshaft synchronizer retaining bolt.
- Tighten to 25 Nm (18 lb-ft).
- Install the CMP sensor.
- Tighten to 3 Nm (27 lb-in).
- Clean and apply the sealant to the oil pan sealing areas shown in illustration and install the oil pan rear seal.
- Apply silicone gasket and sealant to the rear main bearing cap.
- Install the oil pan rear seal.
- Clean the oil pan mating surfaces with metal surface cleaner and apply silicone gasket and sealant to the oil pan mating surfaces.
- Tighten the oil pan bolts in the sequence shown in illustration.
- Tighten to 10 Nm (89 lb-in).
- Install the oil pressure sensor.
- Tighten to 27 Nm (20 lb-ft).
- If equipped, install the new oil cooler and tube assembly. For additional information, refer to OIL COOLER .
- Install a new oil filter.
- Using new gaskets, install the RH and the LH cylinder heads.
- Install the new bolts. Make sure the bolts are installed in the correct locations.
- Install the new long bolts.
- Install the new short bolts.
- Tighten the bolts in the sequence shown in illustration in 3 stages.
- Stage 1: Tighten to 20 Nm (14 lb-ft).
- Stage 2: Tighten to 40 Nm (29 lb-ft).
- Stage 3: Tighten to 50 Nm (36 lb-ft).
- Carry out the following final tightening process on each bolt in the sequence shown in illustration.
- Long bolts:
- Loosen the long bolt and back out 3 turns.
- Tighten the long bolt to 45 Nm (33 lb-ft).
- Tighten the long bolt an additional 180 degrees.
- Continue on to the next bolt in sequence.
- Short bolts:
- Loosen the short bolt and back out 3 turns.
- Tighten the short bolt to 25 Nm (18 lb-ft).
- Tighten the short bolt an additional 180 degrees.
- Continue on to the next bolt in sequence.
- Long bolts:
- Install the lower exhaust manifold studs on both cylinder heads.
- Tighten to 8 Nm (71 lb-in).
- Install the 12 push rods.
- Install the rocker arms.
- Position the rocker arms and pivots.
- Hand-start the bolts.
- Tighten the bolts in 2 stages.
- Stage 1: Tighten to 5 Nm (44 lb-in).
- Stage 2: Tighten to 32 Nm (24 lb-ft).
- Install the valve covers.
- Position the valve covers.
- Install the bolts and tighten to 10 Nm (89 lb-in).
- Install the stud bolts and tighten to 10 Nm (89 lb-in).
- Using a new gasket, install the RH exhaust manifold. Loosely install the RH nuts.
- Tighten the bolts in the sequence shown in illustration.
- Tighten to 25 Nm (18 lb-ft).
- Install the heat shield and the nuts.
- Tighten to 10 Nm (89 lb-in).
- Using a new gasket, install the LH exhaust manifold. Loosely install the LH nuts.
- Tighten the bolts in the sequence shown in illustration.
- Tighten to 25 Nm (18 lb-ft).
- Refer to the illustration for intake manifold sealing components.
- Install the lower intake manifold front and rear end seals.
- Apply a bead of silicone gasket and sealant to the intake manifold front and rear end seal mounting points as indicated.
- Install the lower intake manifold front and rear end seals.
- Position the intake manifold gaskets.
- Position the lower intake manifold.
- Apply a bead of silicone gasket and sealant to the lower intake manifold mounting at the points indicated.
- Position the lower intake manifold.
- Install the 6 long bolts.
- Install the 8 short bolts.
- Tighten the lower intake manifold bolts in 2 stages in the sequence shown in illustration.
- Stage 1: Tighten to 5 Nm (44 lb-in).
- Stage 2: Tighten to 10 Nm (89 lb-in).
- Install new O-ring seals on the fuel injectors.
- Install the fuel injectors and retaining clips on the fuel supply manifold.
- Install the fuel supply manifold, fuel injectors and fuel charging harness as an assembly and install the bolts.
- Tighten to 10 Nm (89 lb-in).
- Using new gaskets, install the upper intake manifold and bolts.
- Tighten the upper intake manifold bolts in 2 stages in the sequence shown in illustration.
- Stage 1: Tighten to 6 Nm (53 lb-in).
- Stage 2: Tighten to 10 Nm (89 lb-in).
- Tighten the upper intake manifold bolts in 2 stages in the sequence shown in illustration.
- Position the engine harness onto the engine and connect the engine harness-to-fuel charging harness electrical connector.
- Position the vacuum harness onto the engine and connect the 2 vacuum harness connections.
- Install the ignition coil and bolts.
- Tighten to 6 Nm (53 lb-in).
- Install the engine harness pin-type retainer and connect the ignition coil electrical connector.
- Install the EGR system module-to-manifold tube.
- Connect the following:
- Idle air control (IAC) electrical connector
- Throttle position (TP) sensor electrical connector
- Exhaust gas recirculation (EGR) system module electrical connector
- EGR system module vacuum connector
- EGR system module-to-exhaust manifold tube upper fitting and tighten to 40 Nm (30 lb-ft)
- Tighten the EGR system module-to-manifold tube lower fitting.
- Tighten to 40 Nm (30 lb-ft).
- Connect the cylinder head temperature (CHT) sensor electrical connector.
- Install the 4 engine harness pin-type retainers.
- Install and connect the spark plug wires and retainers as an assembly.
- Install the oil level indicator tube and the retaining nut.
- Tighten to 10 Nm (89 lb-in).
- Connect the quick disconnect crankcase vent hose to the intake manifold.
- Connect the quick disconnect crankcase vent hose and connect the crankcase vent hose valve electrical connector.
- Connect the intake manifold runner control (IMRC) electrical connector.
- Connect the CMP sensor electrical connector.
- Connect the oil pressure sensor electrical connector and install the engine harness pin-type retainer.
- Install the RH engine mount bracket.
- Tighten to 48 Nm (35 lb-ft).
- Install the catalyst monitor sensor electrical connector bracket.
- Tighten to 28 Nm (21 lb-ft).
- Connect the CKP sensor electrical connectors.
- Install the power steering pump bracket and mounting bolts.
- Tighten to 25 Nm (18 lb-ft).
- Tighten to 48 Nm (35 lb-ft).
- Install the accessory drive belt tensioner and bolts.
- Tighten to 25 Nm (18 lb-ft).
- Install the coolant pump outlet tube.
- Install the 2 bolts and tighten to 10 Nm (89 lb-in).
- Connect the 3 coolant hoses.
- Reposition the clamps.
- Install the A/C compressor bracket and bolts.
- Tighten to 48 Nm (35 lb-ft).
- Install the A/C compressor mounting bracket brace and generator mounting bracket as an assembly and install the bolts.
- Tighten to 25 Nm (18 lb-ft).
- Tighten to 47 Nm (35 lb-ft).
- Install the coolant extension tube and bracket and bolt.
- Tighten to 25 Nm (18 lb-ft).
- Install the generator and bolts.
- Tighten to 25 Nm (18 lb-ft).
- Connect the generator.
- Install the B+ wire terminal and nut and tighten to 8 Nm (71 lb-in).
- Connect the generator electrical connector.
- Install the accessory drive idler pulley and bolt.
- Tighten to 47 Nm (35 lb-ft).
- Install the coolant pump pulley and bolts.
- Tighten to 11 Nm (8 lb-ft).
- Install the special tools.
- Install the engine lifting equipment.
- Remove the engine from the stand.
- Assemble the special tools and the crankshaft rear seal.
- Install the special tools on the rear of the crankshaft.
- Install the crankshaft rear seal. Tighten the center jack screw (303-S560) until the spacer (303-561) contacts the engine block.
- Install the flywheel and bolts.
- Tighten to 80 Nm (59 lb-ft).
CAUTION:
Make sure the components are installed in the correct locations.
NOTE:
Lubricate the crankshaft main bearings with clean engine oil prior to installation.
CAUTION:
The crankshaft journals must be protected from damage when installing the crankshaft.
CAUTION:
The main bearings are precision selective fit. Inspect the bearing clearance. For additional information, refer to ENGINE SYSTEM-GENERAL INFORMATION
.
NOTE:
If the rear main bearing cap is not installed within 4 minutes, remove the sealant and reapply.
Fig 16: Applying Silicone Gasket And Sealant To Rear Main Bearing Cap-To-Cylinder Block Parting Line
CAUTION:
Inspect the piston clearance. For additional information, refer to ENGINE SYSTEM-GENERAL INFORMATION
.
CAUTION:
Do not damage the cylinder wall with the sharp edges of the connecting rod.
NOTE:
4.2L shown, 3.9L similar.
CAUTION:
Inspect the connecting rod bearing clearance. For additional information, refer to ENGINE SYSTEM-GENERAL INFORMATION
.
CAUTION:
The connecting rod cap will fit only one way.
CAUTION:
Do not damage the camshaft lobes when installing the camshaft.
NOTE:
If correctly aligned, the engine dynamic balance shaft keyway will be at 12 o'clock and the camshaft keyway will be at 6 o'clock on the camshaft.
NOTE:
Lubricate the valve tappets with clean engine oil prior to installing. If reusing the valve tappets, make sure to install them in their original locations.
CAUTION:
All timing marks must be aligned with the No. 1 cylinder set on TDC of the compression stroke or the synchronizer assembly will not be installed correctly.
NOTE:
The crankshaft must not be turned until the camshaft synchronizer is installed.
NOTE:
Use Thread Sealant with Teflon on studs No. 4 and 6 and bolt No. 12.
CAUTION:
The coolant pump and gasket must be installed at this time to correctly tighten all of the engine front cover fasteners in sequence.
NOTE:
Lubricate the crankshaft front seal lips with clean engine oil prior to installation.
CAUTION:
After installation, do not loosen the synchronizer bolt and rotate the synchronizer assembly. The synchronizer assembly is not adjustable. Do not loosen the synchronizer bolt after the alignment tool has been removed in order to align the CMP electrical connector for any reason. If the electrical connector is not in the correct position, the synchronizer assembly must be removed, the alignment tool and the assembly reinstalled if the engine has not been rotated from top dead center TDC of the compression stroke on the No. 1 cylinder.
CAUTION:
A synchronizer alignment gauge must be used during the installation of the synchronizer assembly. Failure to follow this procedure will result in the fuel system being out of time with the engine, possibly causing engine damage.
NOTE:
Always coat the synchronizer drive gear with clean engine oil prior to installation.
NOTE:
During installation, the arrow on the special tool with rotate clockwise as the gears engage.
NOTE:
If the oil pan is not installed within 4 minutes, remove the sealant and reapply.
CAUTION:
A new oil cooler must be installed or severe damage to the engine can occur.
NOTE:
Tighten the oil filter one-half turn after the gasket makes contact with the oil filter housing.
NOTE:
Install the new cylinder head gaskets with the small hole to the front of the engine.
CAUTION:
Always use new bolts.
NOTE:
Lubricate the bolts with clean engine oil prior to installation.
CAUTION:
Each bolt must be loosened and the final tightening carried out prior to working on the next bolt in the sequence. Do not loosen all of the bolts at one time.
NOTE:
Lubricate the push rods with clean engine oil prior to installation. If reusing the push rods, make sure to install them in their original locations.
NOTE:
If reusing the rocker arms, make sure to install them in their original locations.
NOTE:
Inspect the valve cover gaskets for damage. Install a new gasket, if necessary.
NOTE:
The lower intake manifold must be installed within 4 minutes of applying the sealant.
NOTE:
Make sure the bolts are installed in the correct locations.
NOTE:
Lubricate the O-ring seals with clean engine oil to aid installation.
NOTE:
Do not tighten the EGR system module-to-manifold tube lower fitting.
NOTE:
Apply dielectric grease to the inside of the spark plug wire boots before attaching to the spark plugs and the ignition coil.
NOTE:
Install a new oil level indicator tube O-ring seal.
NOTE:
Install a new coolant pump outlet tube O-ring seal and lubricate with clean engine coolant.
NOTE:
RH shown, LH similar.
NOTE:
Lubricate the crankshaft rear seal lips with clean engine oil prior to installation.