Removing and Installing/Sealing Left Cylinder Head Cover

11 12 005 - Removing and installing/sealing left cylinder head cover (N73)





Necessary preliminary tasks:
- Remove design cover.
- Remove acoustic cover.
- Remove center of assembly partition wall 51 71 085 Removing and installing center of assembly compartment bulkhead.
- Remove cover and seal.
- Remove upper section of intake filter housing Service and Repair and intake hose on left and right.
- Remove intake air manifold Service and Repair.
- Release engine wiring harness partially.
- Disconnect ignition wiring harness plug connections.
- Remove rod-type ignition coils Removing and Installing/Replacing All Rod-Type Ignition Coils (N73).





Important!
Do not bend any high-pressure lines Service and Repair.

Detach high-pressure lines (1) at mounting points (2).

On high-pressure pump:
Detach feed line (3).
Detach high-pressure line (4).
Detach leakage line (5).
On rail strip:
Detach high-pressure lines (6).





Remove servomotor Removing and Installing/Replacing Servomotor for Left and Right Eccentric Shaft for left eccentric shaft.
Release screws (1). Remove high-pressure pump (2).
Release screws (3). Remove spacer (4).
Illustrations show cylinders 1 to 6.





Release screws (1).
Disconnect plug connection from secondary air valve (2)
- air connection
and remove towards top.

Installation:
Replace seal for secondary air valve (2).
Illustrations show cylinders 1 to 6.





Disconnect plug connections on sensors (1).
Release screws on flange (2) and remove.
Release screws in area (3).
Remove cylinder head cover (4).

Installation:
Replace sealing elements for screw connection (3).
Insert screw connection (3) without pretension.
Tighten down screw connection (3) in diagonal sequence from inside to outside.





Installation:
Replace spark plug domes.
Coat rubber seals on spark plug dome with sealing compound.
When fitting cylinder head cover: Align spark plug domes to cylinder head cover.





Replace sealing ring (1).

Installation:
Press sealing ring (1) into cylinder head cover until flush.
Note installation direction of sealing ring (1).
Groove in sealing ring (1) points outwards.





Installation:
Clean seal residue from sealing surfaces.
Apply a thin and even coat of Drei Bond liquid sealant (sourcing reference: BMW Parts Service) in area (1):
- at partition levels
- at half-moon section
Replace cylinder head cover gasket.
Ensure that seals are correctly seated.
- Side.
- Rear side of cylinder head.





Assemble engine.