Cylinder Head Assembly: Testing and Inspection

11 12 729 Checking cylinder head for watertightness (N54, N54T)

Special tools required:





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.





^ Disassemble cylinder head.





Note:
Observe mounting of special tool 11 4 341 on cylinder no. 1

Secure special tool 11 4 341 using bolts 11 4 345 tightened to 25 Nm





Extend special tool 11 4 341 with special tool 11 4 345.

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 screws (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.