Cylinder Head Assembly: Testing and Inspection

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





Special tools required:
^ 11 4 342
^ 11 4 344
^ 11 7 191





Important!
Pressure-test cylinder head to max. 3 bar.
Heat cylinder head to 60 °.
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 max. 15 Nm.





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 °.

Check for bubble formation in a water bath.





Assemble engine.