Valve Cover: Service and Repair

11 12 000 - Removing and installing/sealing cylinder head cover (N52)





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
color 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 fuel injectors.
- Remove tension strut 51 71 373 - Removing and installing/replacing tension strut on spring strut dome.
- Remove clean air duct Service and Repair.





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. 11 37 Variable Valve Gear
Remove servodrive (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 4AZ 11 12 Cylinder Head with Cover.

Unfasten screws (2).
Tightening torque 11 12 4AZ 11 12 Cylinder Head with Cover.

Installation Note:
Replace aluminium screws.





Replace seal (1).
Replace seal (2).

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





Assemble engine.