Timing Chain: Service and Repair

Timing Chain and Sprocket Replacement


Special Tools
* J 8433 Pulley Puller
* J 41816-2 Crankshaft End Protector
* J 41558 Crankshaft Sprocket Remover
* J 41665 Crankshaft Balancer and Sprocket Installer
* J 41478 Crankshaft Front Oil Seal Installer



Removal Procedure





1. Remove the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement (Service and Repair) .
2. Rotate the crankshaft until the timing marks on the crankshaft and the camshaft sprockets are aligned.
Notice: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.


3. Remove the camshaft sprocket bolts.
4. Remove the camshaft sprocket and timing chain.




5. Use the J 8433 (4) , the J 41816-2 (2), J 41478 (3) and the J 41558 (1) in order to remove the crankshaft sprocket.




6. Remove the crankshaft sprocket.




7. Remove the crankshaft sprocket key, if required.
8. Clean and inspect the timing chain and sprockets. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection () .



Installation Procedure





1. Install the key into the crankshaft keyway, if previously removed.




2. Tap the key (1) into the keyway until both ends of the key bottom onto the crankshaft.




3. Install the crankshaft sprocket onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.




4. Use the J 41665 and the J 41478 (3) in order to install the crankshaft sprocket.
Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.
5. Rotate the crankshaft sprocket until the alignment mark is in the 12 o'clock position.





Important:
* Properly locate the camshaft sprocket locating pin with the camshaft sprocket alignment hole.

* The sprocket teeth and timing chain must mesh.

* The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.

Locate the camshaft sprocket alignment mark in the 6 o'clock position.



6. Install the camshaft sprocket and timing chain.




7. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks.

Notice: Refer to Fastener Notice .

8. Install the camshaft sprocket bolts.

Tighten the camshaft sprocket bolts to 35 N.m (26 lb ft).

9. Install the oil pump. Refer to Oil Pump, Screen, and Crankshaft Oil Deflector Replacement (Service and Repair) .