Timing Belt: Service and Repair

NOTE: Vibration damper must be removed. Use holding tool 2084 and socket 2079 to facilitate removal of vibration damper.

Camshaft Timing Mark, Cylinder Head Cover Installed:

Valve cover installed
- Marking on camshaft sprocket must line up with marking on valve cover.




Valve Cover Removed
- Marking on camshaft sprocket (arrow) must line up with upper edge of cylinder head.




Engine Installed
- Position crankshaft at TDC
- Line up TDC marking 0 with boss on bell housing (arrow)




Engine Removed
- Line up notch of vibration damper with adjustment mark on oil pump housing.
- Install lower drive belt cover (there is an additional adjustment mark).




- Apply sealing compound AMV 188 001 02 to top thread and bolt contact surface.
- Place drive belt on drive belt sprocket of crankshaft and attach vibration damper to crankshaft
- Install belt and sprocket on crankshaft with vibration damper.
- Install vibration damper holding tool 2084.
- Tighten vibration damper center bolt using tool 2079 and a torque wrench.
- torque to 350 Nm (258 ft lb).

CAUTION: The drive belt must NOT get pinched between the oil pump and sprocket when attaching the vibration damper.

- Install drive belt over idler pulley and water pump on the camshaft sprocket.




- Tighten drive belt by turning loosened water pump to the left.

NOTE: After removing the water pump on older engines it is recommended that the sealing surfaces be cleaned and the 0-ring replaced.




- Belt is correctly tensioned when it can be twisted 90° with thumb and index finger between camshaft sprocket and water pump.
- Tighten water pump to 20 Nm (15 ft lb)
- Turn crankshaft twice and check setting.
- Check basic setting of ignition distributor.
- Install central hydraulic system pump and tension v-belt.