Timing Chain: Service and Repair

Removal

Tools Required
J 5825-A Crankshaft Gear Remover






1. Remove the crankshaft position sensor reluctor ring.






2. Check the camshaft timing chain free play. If the camshaft timing chain can be moved in excess of 11 mm (0.43 in.), replacement of the camshaft timing chain and the sprockets is recommended during assembly.
A. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
B. Measure the free play on the slack side (3) of the camshaft timing chain.






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






6. Remove the camshaft sprocket using the J 5825-A.






7. Remove the crankshaft balancer woodruff keys, if required.

Installation

Tools Required
J 5590 Installer






1. Install the crankshaft balancer woodruff keys into the crankshaft keyway.






2. Align the keyway of the crankshaft sprocket with the crankshaft balancer woodruff key.

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

3. Use the J 5590 in order to install the crankshaft sprocket.
4. Rotate the crankshaft until the crankshaft sprocket alignment mark is in the 12 o'clock position.






5. Install the camshaft sprocket and the camshaft timing chain. Install the camshaft sprocket with the alignment mark in the 6 o'clock position.






Notice: Do not use tools to force the camshaft sprocket onto the camshaft. The camshaft sprocket is a slip fit onto the camshaft and does not require tools to install. Using force against the camshaft can cause component damage and cause the expansion plug at the rear of the clock to move out of position. The expansion plug out of position can leak engine oil or fall out. A missing or leaking expansion plug at the rear of the camshaft bearings can cause a loss of oil and oil pressure leaking to extensive engine damage.

6. Rotate the camshaft until the camshaft and crankshaft sprocket alignment marks are in the proper 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 camshaft sprocket bolts. Tighten the camshaft sprocket bolts to 25 NM (18 ft. lbs.).






Important: Align the keyway on the crankshaft position sensor reluctor ring with the crankshaft balancer woodruff key in the crankshaft. Install the crankshaft position sensor reluctor ring onto the crankshaft until completely seated against the crankshaft sprocket.

8. Install the crankshaft position sensor reluctor ring.
A. Align the keyway on the crankshaft position sensor reluctor ring with the crankshaft balancer woodruff key in the crankshaft.
B. Use the J 5590 in order to push the crankshaft position sensor reluctor ring onto the crankshaft until completely against the crankshaft sprocket.