Removal & Installation
- Before servicing the vehicle, refer to the Precautions section.
- Disconnect the negative battery cable.
- Drain the cooling system and engine oil.
Remove or disconnect the following:
The fan clutch is equipped with right-hand thread.
Place a guard plate behind the radiator/condenser to protect it from damage during removal and installation.
Accessory drive belt and tensioner
The engine must not be rotated backward.
- Rotate the crankshaft clockwise to align the crankshaft timing marks at 40° After Top Dead Center (ATDC). Insure that the grooves in the camshafts (6 in the illustration) align with the cylinder head cover mating surface on the intake side of the cylinder heads.
The timing chain cover bolts are different lengths and diameters. Note their locations for installation.
Timing chain cover
Lock the camshafts using the Camshaft Locking tools 112-589-00-32-00 and 112-589-01-32-00.
Camshaft sprockets bolts
- Align the copper plated links of the timing chain with the marks on the camshaft sprockets, the crankshaft sprocket, and the balancer sprocket for the 3.2L and 3.7L engines. The 4.3L and 5.9L engines uses an idler sprocket in place of the balance shaft.
Install or connect the following:
Camshaft sprockets along with the timing chain. Tighten the attaching bolts to 37 ft. lbs. (50 Nm) plus 90-100 degrees.
- Clean the sealing surfaces and apply a bead of silicone sealant to the timing chain cover.
The cover must be installed within ten minutes after the sealant is applied.
Timing cover. Tighten the bolts to 15 ft. lbs. (20 Nm).
CT sensorTiming chain tensionerGeneratorCrankshaft pulley and tighten the bolt to 148 ft. lbs., then tighten another 95 degreesAir pump, if equippedAir conditioning compressor and the power steering pumpCylinder head coversOil panAccessory drive belt and tensionerUpper and lower coolant hosesFan shroud, cooling fan, and fan clutch
Fill the cooling system and the crankcase to the correct levels.
- Read fault memory, encode the radio and normalize the power windows.