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 °.
Check for formation of bubbles 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 formation of bubbles in a water bath.







Assemble engine.