Timing Chain: Service and Repair

Timing Chain, Sprockets, and/or Tensioner Replacement

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

Removal Procedure

Notice: In order to rotate the engine install a bolt with the same threads as the crankshaft, but do not use the crankshaft balancer bolt or a bolt longer than 1 inch, in the crankshaft. Failing to do so will cause damage to the bolt threads and the crankshaft threaded hole when removing the bolt.





1. Remove the crankshaft position (CKP) sensor reluctor ring.
2. Install a 7/16-20 x 1 inch bolt into the end of the crankshaft.

3. Notice: Align the timing marks before removing the timing chain. If it is necessary to turn either the camshaft or the crankshaft with the timing chain removed, loosen or remove the valve rocker arms. Turning either the crankshaft or camshaft with the timing chain removed may cause the pistons to contact the valves, resulting in damage.

Rotate the crankshaft until:
^ The timing marks on both sprockets line up.
^ The number 4 cylinder is at top dead center (TDC) of the compression stroke.





4. Unsnap the timing chain tensioner shoe from the pin (1).





5. Remove the camshaft sprocket bolts.





6. Remove the camshaft sprocket and the camshaft timing chain.





7. Using J 5825-A and an open end wrench, remove the crankshaft sprocket.





8. Remove the crankshaft balancer key.





9. If necessary, remove the timing chain tensioner bracket bolt and bracket.
10. Clean and inspect the timing chain and sprockets, if necessary.

Installation Procedure





1. Notice: Refer to Fastener Notice in Service Precautions.

If necessary, install the timing chain tensioner bracket and bolt.
^ Tighten the bolt to 12 Nm (106 inch lbs.).





2. Install the key into the crankshaft keyway. The crankshaft balancer key should be parallel to the crankshaft or with a slight incline.





3. Align the keyway of the crankshaft sprocket with the crankshaft balancer key.
4. Using J 5590, install the crankshaft sprocket.





5. Important: Install the camshaft sprocket with the alignment mark at the 6 o'clock position.

Install the camshaft sprocket and the camshaft timing chain. Wrap the timing chain around the crankshaft sprocket and position to the driver's side of the engine.





6. Install the timing chain tensioner shoe onto the bracket and position the top of the shoe under the tab at the top of the bracket.





7. Insert the camshaft timing chain sprocket into the timing chain and position so when the camshaft timing chain sprocket is installed on the camshaft, the camshaft timing marks will line up.

Important: Do not use a hammer to install the camshaft sprocket onto the camshaft. To do so may dislodge the expansion cup plug.

8. Install the camshaft sprocket bolts.
^ Tighten the bolts to 25 Nm (18 ft. lbs.).





9. Ensure that the crankshaft sprocket is aligned at the 12 o'clock position and camshaft sprocket is aligned at the 6 o'clock position.
10. Remove the bolt that was installed in the end of the crankshaft.
11. Install the CKP sensor reluctor ring.