Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
11 12 006 Removing and installing/sealing right cylinder head cover (S65)
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium material requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
The end faces of aluminum screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Scratching of the cylinder head cover is not permitted (risk of corrosion).
Necessary preliminary tasks:
- Remove intake air manifold .
- Remove rod-type ignition coils. See 12 13 512 REMOVING AND INSTALLING/REPLACING ALL IGNITION COILS (S65) .
- Disconnect plug connection at camshaft sensors.
Release bolts along line (1).
Installation:
Replace seal (1).
Align gasket (1) on cylinder head cover groove.
Press in gasket (1) so that it is free from tension.
Release park plug tube (1).
Installation:
Check rubber on spark plug tube (2) for damage; replace spark plug tube (2) if necessary.
Apply a light coating of engine oil to spark plug tube (2) prior to installation.
Installation:
Clean seal residue from sealing surfaces.
Coat contact surfaces of joint (1) with Drei Bond 1209.
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.