Removing and Installing/Sealing Left Cylinder Head Cover

Removing And Installing/sealing Left Cylinder Head Cover (N62)
(Cylinder Bank 5 to 8)

Remove design cover.

Remove acoustic cover.

Remove center of assembly partition wall.

Remove ignition coil cover.

Note: For purposes of clarity, the following work steps are shown on the engine after it has been removed.

Installation:
The cylinder head cover and its gasket are made from a single material which adapts to the contour of the cylinder head.
The gasket and uncoupling elements of the screw connection are matched to each other.

If the cylinder head cover was leaking, the fault can only be rectified with a new cylinder head cover, new gasket and new screw connections.





Unclip cable holder (1) with cables.

Pull tank venting valve (2) off holder.





Unlock plug (1) and remove.





Release screws and remove sealing element (2).

Remove sensors (3 and 4).

Remove ignition coils.





Release both grounding cables.

Unlock and detach vent hose.

Unclip cable duct (1) and remove cable from holder.

Remove servomotor for left eccentric shaft.





Unfasten screws.

Remove spacer (3) upwards.

Installation:
Replace sealing ring.





Remove injection pipe.

Release screw connections (1, 2, 3 and 4).

If necessary, withdraw dipstick.

Remove cylinder head cover.





Installation:
Note installation direction of sealing ring (1).
Groove in sealing ring (1) points outwards.





Replace sealing ring (1) and press into cylinder head cover until flush.





Installation:
Align gasket (1) loosely in cover groove. Starting at corner radii, secure gasket (1 ) in cover groove and press into groove so that it is free of tension.





Installation:
Replace spark plug domes.
Coat rubber seals on spark plug dome (1) with anti-friction rubber coating.





Installation:
Install spark plug domes in cylinder head.
When fitting cylinder head cover:
Align spark plug domes to cylinder head cover.





Installation:
Clean gasket residue from sealing surface.
Apply coat of Drei Bond 1209 to contact surfaces of joint.





Installation:
Clean gasket residue from sealing surface.
Apply thin, uniform bead of Drei Bond 1209 to transmission area on half-moon sections.





Replace sealing elements (1).





Installation:
Make sure gasket is correctly seated at sides and on rear side of cylinder head.





Installation:
Screw connections (1, 2, 3 and 4) of cylinder head cover are different.
Replace screw connections (3).
Insert screw connections (1, 2 and 3) without pretension and align cover.
Tighten down screw connections (1 , 2 and 3) in diagonal sequence from inside to outside.