Cylinder Head Assembly: Testing and Inspection

11 12 729 Checking Cylinder Head For Watertightness (N63)

Special tools required:







Necessary preliminary work:
- Remove left cylinder head.
- Remove right cylinder head.
- Remove all valves.







NOTE:
Set of special tools 11 8 080 can be used for cylinder bank 1 to 4 and cylinder bank 5 to 8.
Position special tool 11 8 081 on cylinder head.







Insert special tool 11 8 083 and tighten in sequence (1 to 10) in several steps.
Tightening torque: 25 Nm







Remove vent screw (1).
Tightening torque: 11 12 8 AZ.

Installation note:
Replace sealing ring.







IMPORTANT:
Max: 0.8 Nm.

Screw in special tool 11 8 082 with suitable tool and special tool 00 9 250 to 0.8 Nm.
Connect compressed air hose with pressure gauge.
Immerse cylinder head in a water bath. Inspection pressure 4.0 bar.
Check cylinder head for escaping air (cracks).

NOTE:
If necessary, add cleaning agent to water bath.
Assemble engine.