Cylinder Head Assembly: Testing and Inspection

11 12 729 Check cylinder head for watertightness (M57T2)

Special tools required:





Necessary preliminary tasks:
^ Remove cylinder head.
^ Removing valves

Seal coolant openings with special tool kit 11 6 400 consisting of special tools 11 6 401 / 11 6 402 / 11 6 403 / 11 6 404 / 11 6 406 / 11 6 407 / 11 6 408.





Note:
Special tool 11 6 407 is one set.

Use the old cylinder head bolts to secure the special tools 11 6 401 / 11 6 402 to the cylinder head.





Immerse cylinder head in a water bath.

Test pressure: 4.5 bar.

Check cylinder head for escaping air (cracks).

Note:
If necessary, relieve water bath with cleaning agent.