Timing Chain: Service and Repair

Modifications:

Modifications to Timing Chain: The sleeves (2) have recesses (jogs, arrow and A) and widened sleeve ends. The result is improved oils supply and less friction between sleeves (2) and pins (3).

Production Breakpoint of Modifications:

Special Tools:

Removal and Installation






1. Remove front cover (14) at top, Service and Repair
2. Remove chain tensioner (14), Timing Chain Tensioner.
3. Detach all spark plug connections.
4. Blow out spark plug recesses with compressed air.
5. Unscrew all spark plugs, tightening torque 20 Nm (15 ft lbs).






6. Cover over the exposed part of the chain box with a clean cloth and grind open both chain pins (arrows) at a double link of the timing chain.
7. Attach new timing chain with the rivet link to the old timing chain. This is done by pressing out the ground-open double link.






8. Fit new timing chain connected to old timing chain onto the camshaft gear. Slowly turn crankshaft in direction of rotation of engine.

CAUTION: The timing chain must remain meshed when turning the camshaft gear.






9. Pull out the exposed end of the old timing chain evenly corresponding to the new timing chain being drawn in.

10. Turn crankshaft long enough for it to be possible to connect the ends of the new timing chain to the rivet link.

NOTE: Rivet link must be inserted from behind.






11. Insert thrust piece (03) as shown in drawing into the rivet tool and tighten with the screw (arrow).

NOTE: The figure 2 is stamped on the side of the thrust piece (03).






12. Insert moving jaw (02) with the figure 2 into the rivet tool as shown in the drawing.






13. Insert plate (arrow) into the moving jaw (02).






14. Fit web (arrow) onto both rollers on the rivet link.

NOTE: Rivet heads of the rivet link pins must be guided in the slot (C).

15. Screw in spindle (04) until a firm resistance is felt.

NOTE: When screwing in, ensure that the pins of the rivet link can be guided into the holes of the plate.






16. Take off rivet tool and change over the moving jaw (02) to the rivet profile (D).






17. Position rivet tool exactly over center of pin. Rivet pins of the rivet link individually by tightening the spindle (04) to approx. 25 Nm.





18. Check riveting (arrows), re-rivet if necessary.
19. Rotate engine twice by hand and check camshaft timing.





20. Basic setting.
21. Install in the reverse order.

NOTE: For additional information [1][2]Procedures