Removal and Replacement

Camshaft





Removal

1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury.

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Maintenance/Service and Repair.

2. CAUTION: At no time, when the timing chains are removed and the cylinder heads are installed, may the crankshaft or camshaft be rotated. Severe piston and valve damage will occur.

Remove the camshaft roller followers.
3. Remove the timing chain.
4. Remove the bolt and the camshaft sprocket and spacer.
5. Remove the 13 camshaft bearing cap bolts.
6. Remove the camshaft bearing cap ladders.
7. Remove the camshaft from the cylinder head.

Installation

1. Lubricate the camshaft journals with clean engine oil.





2. Install the camshaft onto the cylinder head.
3. Lubricate the camshaft bearing cap ladders with clean engine oil.
4. Install the camshaft bearing caps and loosely install the bolts.
5. Tighten the bolts in the sequence shown.
^ Tighten to 10 Nm (89 inch lbs.).





6. Install the camshaft sprocket and bolt. Tighten the bolt in 2 stages.
^ Stage 1: Tighten to 40 Nm (30 ft. lbs.).
^ Stage 2: Tighten an additional 90 degrees (1/4 turn).
7. Install the timing chains.
8. Install the roller followers.

9. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury.

If equipped with fire suppression system, repower the system.