Timing Components: Service and Repair

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

6 - Idler wheel

7 - 27 Nm

8 - 65 Nm
^ Use counterhold 3036 to loosen and tighten

9 - Camshaft sprocket
^ For exhaust camshaft
^ To remove and install first remove toothed belt
^ Installed position

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

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





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.





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