Removal and Replacement

TIMING CHAIN





To check the timing chain for wear and stretch, remove the right-bank cylinder head cover and position the engine at TDC of cylinder number one Lock the camshafts with special tool 8929 - Locking Pins. The timing marks on the camshaft gears must face each other. Rotate the engine in the direction of rotation only and do not turn back otherwise measurement errors can result. With the camshafts locked, check the position of the vibration damper. The chain stretch is measured by the number of crankshaft degrees past the TDC mark. The timing chain is OK when the belt pulley is at the marking at max. 11° after TDC with locked camshafts. Replace the timing chain has stretched beyond specifications.





1. Disconnect negative battery cable.
2. Remove the right cylinder head cover.
3. Make sure the crankshaft is turned to the TDC. Verify TDC of the crankshaft by lining up the mark on the front cover with the mark on the crankshaft damper.
4. Make sure that the timing marks on the back of the camshafts are horizontal and pointing at each other.
5. Remove the timing chain tensioner.

NOTE: Cover the timing chain area. Care must be taken not to drop any repair debris or pieces into the engine when separating the timing chain links.





6. Install special tool # 9554 using two of the cylinder head cover bolts.
7. Assemble special tool #9312-1 using 9312-3 and 9312-4. Install insert #9312-13 and retain with screw provided.

CAUTION: Care must be taken not to drop the timing chain plates into the engine once the timing chain is separated.

NOTE: When installing special tool #9312-1 onto timing chain link, be sure to back off the smaller nut of the thrust pin #9312-3 until the pin is recessed inside of the spindle, #9312-4. Screw the thrust spindle #9312-4 in until it is seated and aligned properly over the rivet of the timing chain.

NOTE: When fitting the thrust spindle, ensure that the thrust pin is positioned at the left timing chain pin of a chain link.

NOTE: Cover the timing chain area. Care must be taken not to drop any repair debris or pieces into the engine when separating the timing chain links.





8. Carefully turn the thrust pin #9312-13 of special tool #9312-1 clockwise while holding the handle until the rivet is pressed out and the chain is separated. Discard the loose link and plates.
9. Use a small screwdriver to prevent the timing chain from slipping into the engine.

NOTE: One whole timing chain link must be removed.

CAUTION: IT IS ESSENTIAL that the installation procedure for the timing chain is followed exactly. Failure to do so will result in severe engine damage.