Cylinder Head Assembly: Testing and Inspection

11 12 729 Checking cylinder head for water leaks (N55)

Special tools required:





Important!
Pressure-test cylinder head to max. 3 bar.
Heat cylinder head to 60°C.
Check for bubble formation in a water bath.





Necessary preliminary work:
^ Remove cylinder head.
^ Disassemble cylinder head.





Fit special tool 11 7 191.

Installation Note:
Secure special tool to 15 Newton meters.





Fit special tool 11 4 342 with screws (1).

Screw in 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°C.

Check for bubble formation in a water bath.





Assemble engine.