Tools Required

1. Disconnect the battery negative cable from the battery. Refer to Battery Negative Cable Disconnection and Connection in engine electrical.



2. Remove the coolant reservoir from the radiator. Refer to Coolant Recovery Reservoir Replacement .
3. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.
4. Remove the air intake duct from the throttle body. Refer to Air Cleaner Assembly Replacement in Engine Controls.
5. Remove the engine front cover from the engine block. Refer to Engine Cover Replacement .



6. Make sure that the timing marks are aligned before removing the timing chain and sprockets.



7. Remove the camshaft sprocket bolts from the timing chain sprocket.
8. Remove the timing chain and sprocket from the camshaft.



9. Use the J 28509-A to remove the crankshaft sprocket from the crankshaft.
10. Remove the crankshaft key, if necessary.

Important: Ensure that the sprocket alignment mark faces away from the engine block. Ensure that the sprocket is fully seated against the crankshaft shoulder.

1. Install the crankshaft key, if necessary.



2. Use the J 22102 in order to install the crankshaft sprocket to the crankshaft.



3. Install the camshaft sprocket and the camshaft timing chain to the front of the camshaft.



4. Make sure that the following conditions exist:

•	The camshaft and the crankshaft timing marks are aligned.

•	The camshaft dowel pin and the camshaft sprocket hole are properly aligned.

•	The gears and the chain mesh.





Notice: Do not hammer the camshaft sprocket onto the camshaft. To do so may dislodge the rear camshaft plug and damage the camshaft.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the camshaft sprocket bolts. Use the bolts to draw the camshaft sprocket onto the camshaft.

Tighten
Tighten the camshaft sprocket bolts to 34 N·m (25 lb ft).

6. Install the engine front cover to the engine block. Refer to Air Cleaner Assembly Replacement .
7. Install the coolant reservoir to the vehicle. Refer to Coolant Recovery Reservoir Replacement .
8. Install the air intake duct to the throttle body. Refer to Air Cleaner Assembly Replacement in Engine Controls-7.4L.
9. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls.
10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.