Cylinder Head Assembly: Testing and Inspection

11 12 729 Checking cylinder head for water leaks (N74)

Special tools required:





Necessary preliminary tasks:
^ Remove left cylinder head.
^ Remove right cylinder head.
^ Remove all valves.





Note:
Set of special tools 11 6 221 can be used for cylinder bank 1 to 6 and cylinder bank 7 to 12.

Position special tool 11 6 221 on cylinder head.





Special tool 11 6 222 allows the original cylinder head bolts (1) to be used to secure the pressure plate 11 6 221.





Insert special tool 11 8 083 and tighten in sequence (1 to 14) in several steps.

Tightening torque: 15 Nm





Remove bleeder screw (1).

Tightening torque: 11 12 8 AZ.

Installation:
Replace sealing ring.





Important!
Max: 0.8 Nm.

Screw in special tool 11 8 082 with suitable tool and special tool to 0.8 Nm.

Connect compressed air hose with pressure gauge.

Immerse cylinder head in a water bath. Test pressure: 3.0 bar.

Check cylinder head for escaping air (cracks).

Note:
Illustration shows N63.





Note:
If necessary, add cleaning agent to water bath.

Assemble engine.