Cylinder Head Assembly: Testing and Inspection

11 12 729 - Checking cylinder head for leaks (N51)





Special tools required:
- 11 4 341
- 11 4 342
- 11 4 344
- 11 4 345





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.
- Remove all engine valves. Service and Repair





Note:
Observe mounting of special tool 11 4 341 on cylinder.

Secure special tool 11 4 341 with bolts 11 4 345 to 25 Nm.

Installation Note:
1 cyl is marked.





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

Sealing flange must rest flat.





Secure special tool 11 4 344 with bolts (1).

Note:
Compressed air at valve max. 3 bar.

Heat cylinder head to 60°.

Check for bubble formation in a water bath.





Assemble engine.