Toothed Belt Drive, Overview

Toothed belt drive, overview





Note: Mark direction of toothed belt with chalk or felt-tip pen prior to removal. Running a used belt in the opposite direction could destroy it.

1. Toothed belt guard (lower)
^ To remove, unbolt vibration damper

2. 10 Nm
^ Apply D 000 600 when installing

3. Toothed belt guard (center)
^ To remove, unbolt ribbed belt tensioner





4. Toothed belt guard (top)
^ Carefully engage in center section of toothed belt guard when installing

5. Toothed belt
^ Mark direction of rotation with chalk or felt-tip pen before removing
^ Check for wear
^ Installing (adjusting valve timing)

6. Idler wheel
7. 7 Nm
8. 5 Nm
^ Use counterhold 3036 to loosen and tighten





9. Camshaft sprocket
^ For exhaust camshaft
^ To remove and install first remove toothed belt
^ Installed position go to Fig. 1

10. Tensioning roller
11. Washer
12. Toothed belt tensioner
13. O-ring
^ Replace
^ Coat with coolant G 012 A8 D before installing

14. Coolant pump





15. 15 Nm
16. Crankshaft toothed belt sprocket
^ Contact surface between toothed belt sprocket and crankshaft must be free of oil
^ Removing and installing go to Fig. 2

17. 90 Nm + 1/4 turn (90°) further
^ Replace
^ Do not use oil
^ Use counterhold tool 3415 to loosen and tighten

18. 15 Nm
19. 25 Nm





Fig. 1 Installed position of camshaft sprocket
^ Narrow chamfer of camshaft sprocket must face outward (arrows) and marking for TDC No. 1 cylinder must be visible from front.





Fig. 2 Removing and installing crankshaft toothed belt sprocket
- Use counterhold tool 3415 to loosen and tighten central bolt.