Cylinder Head Assembly: Testing and Inspection

11 12 729 - Checking cylinder head for watertightness (S65)





Special tools required:
- 11 5 230
- 11 5 231
- 11 5 235
- 11 5 237
- 11 9 961






Note:
Special tool 11 5 230 can be used for both cylinder heads.





Necessary preliminary tasks:
- Remove cylinder head.
- Disassemble cylinder head.





Secure special tool 11 5 231 with old cylinder head bolts.

Secure special tool 11 5 235 with special tool 11 5 237.

Note:
Picture shows S85.





Secure special tool 11 9 961 with special tool 11 5 237 to 10 Nm.





Note:
Immerse cylinder head in a water bath.

Test pressure: 4.5 bar.

Check cylinder head for escaping air (cracks).

If necessary, add cleaning agent to water bath.

Assemble engine.