Timing Chain: Service and Repair

11 31 051 - Replacing both timing chains (S65)





Special tools required:
- 11 5 290
- 11 5 292






Necessary preliminary tasks:
- Remove all VANOS gears.
- Remove radial shaft seal Service and Repair at front.
- Remove oil pump 11 41 000 Removing and Installing/Replacing Oil Pump.
- Remove oil return pump Removing and Installing/Replacing Oil Suction Pump.
- Remove oil filter housing Removing and Installing / Sealing or Replacing Main Flow Oil Filter.





Release screw plug (1) on bank 1.
Tightening torque: 11 12 4AZ Mechanical Specifications.





Release screw plugs (1).
Tightening torque: 11 11 6AZ Mechanical Specifications.
Release screw (2).
Remove intermediate piece (3) without gearwheel towards front.

Important!
Gearwheel can fall out.





Arrangement of gearwheel and intermediate piece:
Gearwheel (1) with dowel pin.
Intermediate piece (2).
Central bolt (3).






Note:
Bearing pin (1) is only inserted.
Bearing pin (2) for two tensioning rails.

Remove bearing pin with special tool 11 5 290.

Tightening torque: 11 31 2AZ Mechanical Specifications.






Note:
Bearing pin (1) is only inserted.

Screw in special tool 11 5 292 at bearing pin (1) and pull out.





Remove bearing pin with special tool 11 5 290.
Tightening torque: 11 31 2AZ Mechanical Specifications.





Arrangement of both timing chains:
1. - Timing chain, bank 2.
2. - Timing chain, bank 2.
3. - Guide rail, bank 1.
4. - Timing chain, bank 1.
5. - Tensioning rail, bank 1.
6. - Bearing pin, inserted type.
7. - Bearing pin for two tensioning and guide rails.
8. - Bearing pin, screwed type.
9. - Guide rail, bank 2.





Remove timing chain, bank 2.
Remove timing chain, bank 1.





Assemble engine.