11 12 005 Removing And Installing/Sealing Left Cylinder Head Cover (N73)

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Necessary Preliminary Tasks:

Remove design cover.
Remove acoustic cover.
Remove center of assembly partition wall. Refer to 51 71 085 REMOVING AND INSTALLING CENTER OF AASSEMBLY COMPARTMENT BULKHEAD .
Remove cover and seal.
Remove upper section of intake filter housing and intake hose on left and right. Refer to 13 71 010 REMOVING AND INSTALLING/REPLACING LEFT (OR RIGHT) INTAKE FILTER HOUSING (N73) .
Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N73) .
Release engine wiring harness partially.
Disconnect ignition wiring harness plug connections.
Remove rod-type ignition coils. Refer to 12 13 512 REMOVING AND INSTALLING/REPLACING ALL ROD-TYPE IGNITION COILS (N73) .

IMPORTANT: Do not bend any high-pressure lines. Refer to 13 53 175 REMOVING AND INSTALLING/REPLACING ALL PRESSURE LINES (N73) .

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).

Fig 1: View Of High-Pressure Lines

Courtesy of BMW OF NORTH AMERICA, INC.

Remove servomotor for left eccentric shaft. Refer to 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT AND RIGHT ECCENTRIC SHAFT (N73) .

Release screws (1). Remove high-pressure pump (2).

Release screws (3). Remove spacer (4).

Illustrations show cylinders 1 to 6.

Fig 2: Removing Spacer (Left Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 3: Disconnecting Plug Connection From Secondary Air Valve (Left Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 4: Removing Cylinder Head Cover (Left Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 5: Aligning Spark Plug Domes To Cylinder Head Cover

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Fig 6: Installing Sealing Ring Into Cylinder Head Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Clean seal residue from sealing surfaces.

Apply a thin and even coat of Drei Bond liquid sealant in area (1):

At partition levels.
At half-moon section.

Fig 7: Locating Sealant Applying Area (Left Cylinder Head Cover)

Courtesy of BMW OF NORTH AMERICA, INC.

Replace cylinder head cover gasket.

Ensure that seals are correctly seated.

Side.
Rear Side of cylinder head.
Assemble engine.