Checking cylinder head on watertightness (S55 engine)
Special tools required:
- 11 4 342
- 11 4 344
- 11 7 190
CAUTION:
Pressure-test cylinder head to max. 3
bar.
Heat cylinder head to 60°.
Check for bubble formation in a water bath.
Heat cylinder head to 60°.
Check for bubble formation in a water bath.
Necessary preliminary work:
- Remove CYLINDER HEAD .
- Disassemble cylinder head. Refer to REMOVING AND INSTALLING/REPLACING ALL VALVES , REMOVING AND INSTALLING/REPLACING EXHAUST CAMSHAFT , and REMOVING AND INSTALLING/REPLACING INTAKE CAMSHAFT .
Fit the special tool 11 7 191 (from the set 11 7 190).
Installation note:
Secure special tool with maximum 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 screws (1).
NOTE:
Compressed air at valve max. 3 bar
.
Heat cylinder head to 60°.
Check for bubble formation in a water bath.
Heat cylinder head to 60°.
Check for bubble formation in a water bath.
Assemble engine.