Tools Required

J 5825-A Crankshaft Sprocket Remover.

1. Remove the engine front cover and the crankshaft position reluctor ring. Refer to Crankshaft Position Sensor Reluctor Ring Replacement

Important: Once the engine front cover is removed, do not re-install it.

Always install a NEW engine front cover.



2. Rotate the crankshaft until:

•	The number one cylinder is at top dead center (TDC) of the compression stroke.

•	The timing marks on both sprockets line up.




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



5. Use the J 5825-A in order to remove the crankshaft sprocket.
6. Remove the crankshaft sprocket key if necessary.
7. Inspect all parts for wear or damage. Refer to Valve Lifters and Guides Clean and Inspect

Tools Required

J 5590 Crankshaft Sprocket Installer

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



2. Use the J 5590 and a hammer in order to install the crankshaft sprocket.



3. Make sure that the number 1 piston is still at TDC of the compression stroke.
4. Align the timing marks on both sprockets.



5. Install the camshaft sprocket and the timing chain.

The sprockets must mesh in order to prevent damage to the camshaft retainer.

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.

6. Install the camshaft sprocket bolts.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

7. Be sure to align the camshaft and the crankshaft sprocket alignment marks.
8. Install the crankshaft position reluctor ring and the engine front cover. Refer to Crankshaft Position Sensor Reluctor Ring Replacement .