Valve Cover: Service and Repair

REMOVING AND INSTALLING/SEALING BOTH CYLINDER HEAD COVERS

CAUTION: Disconnecting the battery will cancel (clear) the memory of control units which have diagnostic trouble code capabilities. Be sure to interrogate all control units for possible diagnostic trouble codes prior to disconnecting the battery.
BMW anti-theft radios can be rendered useless by disconnecting the battery. Make sure you know the correct code before disconnecting the battery. See your owner's manual for more information.Disconnect negative battery lead.




Version 1 (acoustic cover screwed down)
- Pry out sealing cap. Unscrew nuts.
- Remove acoustic cover.




Version 2 (acoustic cover with press-stud fastener)
- Open press-studs (1 ... 4) one at a time, at the same time lifting the acoustic cover slightly.
- Once all four press-studs have been opened, remove the acoustic cover.

Installation Note: Position acoustic cover and press downwards until press-studs (1 ... 4) click into place.




- Remove suction-filter housing with air-mass sensor.




- Remove covers from ignition coils.
- Removing ignition coils.




- Unfasten left and right cable ducts and fold inwards.

NOTE: Note cable guide and plug connection to transmission control unit and to coolant manifold.




- Unfasten positive battery terminal on battery support point.




- Unfasten retaining elements on left and right sides.




INSTALLATION:
Layout of retaining elements:
(1) Nut
(2) Washer
(3) Rubber mount




- Check seal, replacing if necessary.
- Coat outer and inner grooves and sealing face of cylinder head cover all round with anti-friction rubber coating, e.g. glycerine.
- Press internal gasket into groove in cover without torsional stress, starting at the four corner radii.




- Align outer gasket loosely on groove in cover. Secure gasket in groove in cover, starting in the corner radii at the back (1) and locate without torsional stress in the groove.




- Coat contact faces of joint with three Bond 1209 sealing compound.




- Check that side of gasket is correctly seated and check back of cylinder head.




- Screw two retaining elements to the locating points, without preload at this stage, and align the cover. Install all other retaining elements and tighten crosswise from inside to outside.