11 12 005 Removing and installing/sealing left 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).

Fig 1: Identifying Bolts Along Line

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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 (2).

Fig 2: Identifying Seal And Park Plug Tube

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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.

Fig 3: Identifying Sealing Surfaces Joint

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Installation: 

Check decoupling element (1) for damage and replace if necessary.

Fig 4: Identifying Decoupling Element

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Fit cylinder head cover.

Align spark plug tubes.

Tighten down all retaining elements diagonally from inside to outside.

Tightening torque: 11 12 8AZ  . See CYLINDER HEAD .

Fig 5: Identifying Cylinder Head Cover

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Assemble engine.