Valve Cover: Service and Repair

11 12 000 Removing and installing/sealing cylinder head cover (N51)







IMPORTANT:
Aluminium magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without colour coding (blue).
For reliable identification:
Aluminium screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).







Necessary preliminary tasks:
- Remove acoustic cover.
- Remove rod-type ignition coils.
- Unclip wiring harness for E-valves.
- Remove trailing link.
- Remove fresh air duct.







Unlock and detach engine vent hose (1).
If necessary, pull off metal bracket (2) in direction of arrow.
Release screws (3).
Tightening torque: 11 37 3AZ.
Remove actuator drive (4) in direction of arrow.
If necessary, release nuts (5).
If necessary, remove secondary air valve (6).

Installation note:
Replace aluminium screws.







Release screws in area (1).

Installation note:
Replace aluminium screws.
Tightening torque 11 12 9AZ.
Unfasten screws (2).
Tightening torque 11 12 9AZ.

Installation note:
Replace aluminium screws.







Installation note:
Slotted sleeves (2) for guiding ignition coils in cylinder head cover (1) must be replaced.

Remove slotted sleeves (2).







Replace gasket (1).
Replace gasket (2).

Installation note:
Clean all sealing surfaces.
Do not clean sealing surfaces (1 and 2) with a metal-cutting tool.







Assemble engine.

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