Valve Cover: Service and Repair

11 12 000 Removing and installing/sealing cylinder head cover (N52K)







Necessary preliminary tasks:
- Remove tension strut
- Clamp off battery
- Release coolant expansion tank and place to one side
- Remove acoustic cover







NOTE: Illustrations feature the E91.

Detach sealing (1) from cowl panel.







Release screws (1).
Remove cover (2).







Loosen nut (1).







Tape off engine compartment lid (1) with adhesive tape.
Lift cover (2) in direction of arrow.
Support cover with cloth (3).
Release screw (4) of right cover.







Remove right cover (1).
Remove electronics box cover.
Release rubber gaskets (2) on wiring harness from electronics box.
Tie up wiring harness (3) on engine compartment lid.







Unlock connector (1) from coolant thermostat and detach.
Unlock connector (2) on oil pressure switch and detach.
Unlock connector (3) on coolant temperature sensor (3) and detach.
Detach connector strip (4) from fuel injection pipe.
Unclip oxygen sensor cable (5).







Detach plug connection of VVT sensor (1).
Release ground connections (2) on engine.
Unlock connector (3) of eccentric shaft servomotor and detach.







Unlock plug connections (1) of ignition coils and detach.
Unlock cable channel (2) of cylinder head cover and detach.
Remove ignition coils.







Unlock and detach vent hose (1).
If necessary, pull off metal bracket (2) in direction of arrow.
Slacken screws (3) from electric servomotor (4).
Tightening torque 11 37 3AZ.
Remove servomotor (4).







IMPORTANT: Observe different screw lengths.

Unfasten screws (1) and threaded bolts (2).
Tightening torque 11 12 5AZ.







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







Installation note:
Clean all sealing surfaces (1 and 2).

IMPORTANT: Do not use any metal-cutting tools.

Installation note:
Replace gaskets (1 and 2).







Assemble engine.

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