Timing Chain: Service and Repair

Camshaft Timing Chain and Sprocket Replacement

Tools Required

- J 5825-A Crankshaft Gear Remover
- J 5590 Pinion Bearing Race Installer - Rear

Removal Procedure






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

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 timing marks on both sprockets line up.






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






4. Use the J 5825-A in order to remove the crankshaft sprocket.
5. Remove the woodruff key (crankshaft balancer), if necessary.
6. Inspect all parts for wear or damage. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection 39. Timing Chain and Sprockets Clean and Inspect.

Installation Procedure






1. Install the woodruff key (crankshaft balancer) into the crankshaft, if removed.






Caution: Wear safety glasses in order to avoid eye damage.

2. Align the keyway of the crankshaft sprocket with the woodruff key (crankshaft balancer).
3. Use the J 5590 and a hammer in order to install the crankshaft sprocket.






4. Make sure that the camshaft and crankshaft sprocket timing marks are properly aligned.
5. Align the timing marks on both sprockets. Look to ensure that the crankshaft sprocket alignment mark is in the 12 o'clock position.






6. Install the camshaft sprocket and the camshaft timing chain. The camshaft sprocket alignment mark must be in the 6 o'clock position.

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.

7. Install the camshaft sprocket bolts.

Tighten
Tighten the bolts to 25 Nm (18 lb ft).

8. Look to ensure that the camshaft sprocket and the crankshaft sprocket alignment marks are in the correct position.






9. Install the crankshaft position sensor reluctor ring and the engine front cover. Refer to Crankshaft Position Sensor Reluctor Ring Replacement Service and Repair.