Valve Cover: Service and Repair

11 12 000 Removing and Installing, Sealing Cylinder Head Cover (M52TU / M54 / M56)

Remove engine cover.
Remove ignition coils.
Remove wiring harness of ignition coils from cylinder head cover and place to one side

Note: Illustration on M%$ engine




Press lock.
Pull off the hose for the engine breather.





Remove grounding straps (1).
Remove cylinder head cover.

Installation:





Remove sealing debris from sealing faces of cylinder head and cylinder head cover.
Apply a sealing bead of Drei Bond 1209 on left and right sides at transition between cylinder head and VANOS adjustment unit.





Apply a thin and even sealing bead of Drei Bond 1209 at transition to half-moon sections at VANOS adjustment unit.





Note: Illustration with engine removed.

Apply a thin and even sealing bead of Drei Bond 1209 at transition to half-moon sections at rear of cylinder head.
Check seals and replace if necessary.





Note: Illustration with engine removed.

Make sure gasket is correctly seated on rear and front ends of cylinder head.
Install cover bolts and align cylinder head cover.
Hand-tighten all cover bolts without preload.
Tighten cap nuts crosswise from inside to outside.