Section 281 (Engine - 3.9L): Assembly: Engine: Assembly
- Illustration 1 of 23. Install the components in the order indicated in the following illustration and table. See Fig 1.
- Illustration 2 of 23. Install the components in the order indicated in the following illustration and table. See Fig 2.
- Illustration 3 of 23. Install the components in the order indicated in the following illustration and table. See Fig 3.
- Illustration 4 of 23. Remove the components in the order indicated in the following illustration and table. See Fig 4.
- Illustration 5 of 23. Install the components in the order indicated in the following illustration and table. See Fig 5.
- Illustration 6 of 23. Install the components in the order indicated in the following illustration and table. See Fig 6.
- Illustration 7 of 23. Install the components in the order indicated in the following illustration and table. See Fig 7.
- Illustration 8 of 23. Install the components in the order indicated in the following illustration and table. See Fig 8.
- Illustration 9 of 23. Install the components in the order indicated in the following illustration and table. See Fig 9.
- Illustration 10 of 23. Install the components in the order indicated in the following illustration and table. See Fig 10.
- Illustration 11 of 23. Install the components in the order indicated in the following illustration and table. See Fig 11.
- Illustration 12 of 23. Install the components in the order indicated in the following illustration and table. See Fig 12.
- Illustration 13 of 23. Install the components in the order indicated in the following illustration and table. See Fig 13.
- Illustration 14 of 23. Install the components in the order indicated in the following illustration and table. See Fig 14.
- Illustration 15 of 23. Install the components in the order indicated in the following illustration and table. See Fig 15.
- Illustration 16 of 23. Install the components in the order indicated in the following illustration and table. See Fig 16.
- Illustration 17 of 23. Install the components in the order indicated in the following illustration and table. See Fig 17.
- Illustration 18 of 23. Install the components in the order indicated in the following illustration and table. See Fig 18.
- Illustration 19 of 23. Install the components in the order indicated in the following illustration and table. See Fig 19.
- Illustration 20 of 23. Install the components in the order indicated in the following illustration and table. See Fig 20.
- Illustration 21 of 23. Install the components in the order indicated in the following illustration and table. See Fig 21.
- Illustration 22 of 23. Install the components in the order indicated in the following illustration and table. See Fig 22.
- Illustration 23 of 23. Install the components in the order indicated in the following illustration and table. See Fig 23.
Items 2-7: Cylinder Head Assembly Note
- Install the knock sensors.
- Position the cylinder heads.
- Install new gaskets.
- Install and tighten the RH head bolts in four stages in the sequence shown. See Fig 26.
- Stage 1: Tighten bolts 1 through 10 to 20 N.m (15 lb-ft).
- Stage 2: Tighten bolts 1 through 10 to 35 N.m (26 lb-ft).
- Stage 3: Tighten bolts 1 through 10 to 45 N.m (33 lb-ft) and an additional 90 degrees.
- Stage 4: Tighten bolts 1 through 10 an additional 90 degrees.
- Install and tighten the bolts in two stages.
- Tighten to 20 N.m (15 lb-ft).
- Tighten an additional 90 degrees.
- Install and tighten the LH head bolts in four stages in the sequence shown. See Fig 28.
- Stage 1: Tighten bolts 1 through 10 to 20 N.m (15 lb-ft).
- Stage 2: Tighten bolts 1 through 10 to 35 N.m (26 lb-ft).
- Stage 3: Tighten bolts 1 through 10 to 45 N.m (33 lb-ft) and an additional 90 degrees.
- Stage 4: Tighten bolts 1 through 10 an additional 90 degrees.
- Install and tighten the bolts in two stages.
- Tighten to 20 N.m (15 lb-ft).
- Tighten an additional 90 degrees.
Items 9-15, 17-23: RH and LH Camshaft Assembly Note
- Position the camshafts on the camshaft journals.
- Install the RH camshaft bearing caps.
- Position the bearing caps.
- Install the bearing cap bolts. Tighten the bolts in three stages in the sequence shown. See Fig 31.
- Stage 1: Hand-tighten.
- Stage 2: Tighten to 6 N.m (53 lb-in).
- Stage 3: Tighten an additional 90 degrees.
- Install the LH camshaft bearing caps.
- Position the bearing caps.
- Install the bearing cap bolts. Tighten the bolts in three stages in the sequence shown. See Fig 32.
- Stage 1: Hand-tighten.
- Stage 2: Tighten to 6 N.m (53 lb-in).
- Stage 3: Tighten an additional 90 degrees.
- Using a feeler gauge, confirm that the tappet and shim clearances are within specification. For additional information, refer to VALVE CLEARANCE CHECK in this section.
- If tappet and shim clearances are not within specification, adjust the clearance. For additional information, refer to VALVE CLEARANCE ADJUSTMENT in this section.
Item 24-52: Timing Drive Components Assembly Note
- Install the engine lifting equipment and remove the engine from the stand.
- Position the rear oil seal with the protective installer onto the end of the crankshaft.
- Using the special tools, install the rear main seal.
- Install the flexplate and tighten the bolts in two stages in the sequence shown. See Fig 36.
- Stage 1: Tighten to 15 N.m (11 lb-ft).
- Stage 2: Tighten to 110 N.m (81 lb-ft).
- Mount the engine on a suitable engine stand and remove the engine lifting equipment.
- Remove the crankshaft position (CKP) sensor and the torque converter cover.
- Install the special tool.
- Turn the crankshaft to 45 degrees ATDC. The crankshaft keyway will be in the 6 o'clock position.
- Install the special tool.
- Install the crankshaft sprocket.
- Install the LH VCT unit, exhaust camshaft sprocket and timing chain as an assembly.
- Using new bolts, install the LH VCT unit and exhaust camshaft sprocket bolts finger-tight.
- Remove the locking pin from the LH secondary timing chain tensioner.
- Install the RH VCT unit, exhaust camshaft sprocket and timing chain as an assembly.
- Using new bolts, install the RH VCT unit and exhaust camshaft sprocket bolts finger-tight.
- Remove the locking pin from the RH secondary timing chain tensioner.
- Reset the timing chain tensioners.
- Hold the lever toward the tensioner piston.
- Using finger pressure, compress the tensioner.
- Push the lever down and install a drill rod to lock the piston.
- Install the special tool on the LH head.
- Position the LH timing chain and crankshaft gear.
- Position the timing chain over the LH intake camshaft sprocket.
- Position the crankshaft gear in the timing chain.
- Install the LH timing chain guide.
- Install the LH timing chain tensioner arm.
- Install the LH timing chain tensioner.
- Install the timing chain tensioner and bolts.
- Remove the drill rod.
- Tighten the LH exhaust camshaft sprocket and variable camshaft timing (VCT) unit bolts in two stages:
- Stage 1: Tighten to 35 N.m (26 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
- Remove the special tool.
- Install the special tool on the right cylinder head.
- Position the RH timing chain over the RH intake camshaft sprocket and over the crankshaft gear.
- Install the RH timing chain guide.
- Install the RH timing chain tensioner arm.
- Install the RH timing chain tensioner.
- Install the timing chain tensioner and bolts.
- Remove the drill rod.
- Tighten the RH exhaust camshaft sprocket and VCT unit bolts in two stages:
- Stage 1: Tighten to 35 N.m (26 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
- Remove the special tool.
- Remove the special tool.
- Install the CKP sensor and the torque converter cover.
Items 53 and 56: Variable Cam Timing (VCT) Bush Carrier Assembly Note
- Carefully insert the bush carrier into the VCT unit, compress ring seals with fingers as required. Fully seat the bush carrier by hand before fitting bolts.
Item 59: Sump Body Assembly Note
- Apply three continuous beads of silicone gasket and sealant to the areas shown.
- Install the oil sump. Using a straightedge, align the sump to the lower cylinder block. Tighten the bolts in sequence in two stages.
- Tighten the bolts to 15 N.m (11 lb-ft).
- Tighten the bolts to 25 N.m (18 lb-ft).
- Install a new gasket, the oil pump and the bolts.
- Install the oil pump screen cover and tube.
Items 60 and 61: Engine Front Cover Assembly Note
- Apply silicone gasket and sealant in eight places.
- Install the engine front cover.
- Install new gaskets.
- Position the engine front cover on the cylinder block.
- Loosely install the bolts.
- Tighten the bolts in two stages in the sequence shown. See Fig 67.
- Stage 1: Tighten to 5 N.m (44 lb-in).
- Stage 2: Tighten to 10 N.m (89 lb-in).
- Install the coolant pump.
- Inspect the O-ring seal and install a new O-ring seal as necessary.
- Position a new coolant pump gasket.
- Position the coolant pump.
- Install the bolts and tighten in two stages.
- Stage 1: Tighten to 8 N.m (71 lb-in).
- Stage 2: Tighten an additional 90 degrees.
Items 63-64 and 69-70: Exhaust Manifold Assembly Note
- Install the exhaust manifold.
- Install a new gasket and the exhaust manifold.
- Tighten the eight nuts in the sequence shown.
Items 83-90: RH and LH Valve Cover Assembly Note
- Inspect and install new gaskets as necessary.
- Apply four beads of silicone gasket and sealant as shown. See Fig 71.
- Install the valve covers.
- Tighten the bolts in the sequence shown. See Fig 72.
Items 92-94: Intake Manifold Assembly Note
- Install new intake manifold gaskets.
- Install the intake manifold and tighten the bolts in the sequence shown.
- Connect the throttle body heater hose.
- Install the radio interference capacitor and the nut.
Item 105: Front Crankshaft Seal Assembly Note
- Using the special tool, install the front crankshaft seal.
Items 106-108: Crankshaft Pulley Assembly Note
- Apply silicone gasket and sealant to the crankshaft pulley keyway.
- Using the special tool, install the crankshaft pulley.
- Install the washer and a new bolt and tighten in two stages.
- Stage 1: Tighten to 80 N.m (59 lb-ft).
- Stage 2: Tighten an additional 80 degrees.
- Remove the flexplate holding tool.
Item 114: EGR System Module Gasket Assembly Note
- Install a new EGR system module gasket with the side with the raised circle facing the intake manifold.
Item 130: Oil Level Indicator Tube Assembly Note
- Install a new O-ring seal and the oil level indicator tube.
- Lubricate the new O-ring seal and engine mating surface with clean engine oil.
Item 134: Engine Wiring Harness Assembly Note
- Install the wiring harness onto the front cover.
- Install the wiring harness onto the front cover.
- Connect the crankshaft position (CKP) sensor electrical connector.
- Install the exhaust gas oxygen sensor (HO2S) connectors onto the brackets.
- Connect the pin-type retainers.
- Connect the A/C electrical connector and the retaining clip.
- Connect the power steering pressure (PSP) switch.
- Connect the variable cam timing (VCT) sensor electrical connector.
- Install the nuts and the engine wiring harness retainer.
- Connect the fuel injector and radio interference capacitor electrical connectors.
- Connect the engine wiring harness retainers from the engine appearance cover support bracket.
Items 135 and 137: RH and LH Coil Cover Assembly Note
- Lift up the wire harness and apply a 12.7 mm (0.5 in) bead of silicone sealer in the notch of the valve cover.
- Set the ignition coil harness in the bead of silicone sealer and apply enough additional sealer to surround the wire harness and notch.
- Install the coil cover.
- Connect the wiring harness retainers to the RH valve cover.
- Connect the wiring harness retainers to the RH valve cover.
Items 158 and 159: Oil Filter and Seal Assembly Note
- Install the oil filter until the seal makes contact. Tighten an additional 270 degrees.