Cylinder Head Assembly: Testing and Inspection

11 12 729 - Check cylinder head for water leaks (N54)





Special tools required:
- 11 4 341 11 4 340 Pressure-Testing Fixture
- 11 4 342 11 4 340 Pressure-Testing Fixture
- 11 4 344 11 4 340 Pressure-Testing Fixture
- 11 4 345 11 4 340 Pressure-Testing Fixture





Important!
Pressure-test cylinder head to max. 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.





Necessary preliminary tasks:
- Remove cylinder head Removal and Replacement.
- Disassemble cylinder head Service and Repair.





Note:
Observe mounting of special tool 11 4 341 11 4 340 Pressure-Testing Fixture on 1cylinder.

Secure special tool 11 4 341 11 4 340 Pressure-Testing Fixture with bolts 11 4 345 11 4 340 Pressure-Testing Fixture to 25 Nm.





Install special tool 11 4 341 11 4 340 Pressure-Testing Fixture with special tool 11 4 345 11 4 340 Pressure-Testing Fixture.

Installation Note:
1 cyl is marked.





Fit special tool 11 4 342 11 4 340 Pressure-Testing Fixture with bolts (1), insert knurled screw in direction of arrow.

Sealing flange must rest flat.





Secure special tool 11 4 344 11 4 340 Pressure-Testing Fixture with bolts (1).

Note:
Compressed air at valve (2) must not exceed 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.





Assemble engine.