11 12 000 Removing and installing/sealing cylinder head cover (N55)

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Necessary preliminary tasks:

RELEASE ENGINE WIRE HARNESS in the area of the cylinder head cover.
Disconnect PRESSURE LINES .
Remove CLEAN AIR PIPE .

Release screws (1).

Remove flange (2).

Fig 1: Identifying Flange And Screws

G09844384

Courtesy of BMW OF NORTH AMERICA, INC.

Press and hold down the unlocking device on the vacuum line (1) on the vacuum reservoir (cylinder head cover) in the direction of the arrow.

Detach vacuum line (1) in upward direction.

Fig 2: Detaching Vacuum Line

G09844385

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not loosen the engine vent line (4) on the cylinder head cover.

To dismantle the engine vent line, loosen the screws on the air intake system (3).

NOTE: When changing a faulty engine vent line, the clutch on the coupling on the cylinder head cover may be broken open.

Fig 3: Identifying Engine Vent Line, Air Intake System And Cylinder Head Cover

G09844386

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 4: Cylinder Head Cover Screws Tightening/Loosening Sequence (N55)

G09844387

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws of cylinder head cover from outside inwards in 1/2 turns.

Remove cylinder head cover.

Replace all gaskets.

Fig 5: Cylinder Head Cover Screws Tightening/Loosening Sequence (N55)

G09844387

Courtesy of BMW OF NORTH AMERICA, INC.

Fit cylinder head cover.

Insert screws of the cylinder head cover by 1/2 turn.

Tighten fit screws (1) using 8.5 Nm.

Tighten positional screw (2) using 8.5 Nm.

Tighten remaining screws of cylinder head cover in sequence 3 to 23.

Tightening torque: 11 12 4AZ .