Timing Chain: Service and Repair

NOTE: An open timing chain with connector link is supplied for repairs. The sprockets are to be checked for scores and pitting as well as the chain tensioner for perfect function before installing a new timing chain.

CHAIN REPLACEMENT

- Remove spark plugs.
- Remove cylinder head cover.





- Set engine to TDC and check camshaft adjustment marks.
- Remove chain tensioner.





- Cover the open part of the chain casing with a rag, grind off both chain bolts (arrows) at a double link in the timing chain.
- Aftach new timing chain and the connector link onto the old timing chain. To do this press out ground off double link.
- Put the new timing chain connected with the old timing chain onto the camshaft timing gear. Rotate crankshaft.

CAUTION: The timing chain must remain engaged while rotating the camshaft timing gear.





- Pull out the released end of the old timing chain evenly, to correspond with drawing on the new timing chain.

CAUTION: The timing chain must remain engaged while rotating the camshaft timing gear.





- Secure the ends of the chain to the camshaft timing gear with wire. Detach old timing chain and connect the ends of the new timing chain with the repair connector link.

NOTE: Connector link must be inserted from behind.





- Fit riveting set 103 589 01 63 OO to the basic tool 000 589 43 00 corresponding to the timing chain design (single or double roller chain).
- Put loosely aftached exterior bracket of the connector link in the press tool (arrow). The exterior bracket is held magnetically.





- Put press tool on the connector link and press on bracket up to the stop.

NOTE: Put on clip so that both rivet pins engage.





- Remove assembly tool and turn punch (02) so that the notch (arrow) points forward.





- Install assembly tool exactly over the center bolt. Rivet bolts of the connector links individually, tightening up spindle to approx. 30 35 Nm (reference value).





- Check riveting (arrows), re-rivet if required.
- Install chain tensioner (05-310).





- Turn crankshaft and check adjustment markings at engine TDC position.

NOTE: If the adjustment markings do not align, the valve timing settings of the camshaft must be checked.

- Assembly is completed in the reverse order.