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

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Remove IGNITION COILS
Release IGNITION WIRING HARNESS in cylinder head cover area
Remove TENSION STRUT

Unlock and detach vent hose (1).

If necessary, pull off metal bracket (2) in direction of arrow.

Release screws (3) on electric servomotor.

Tightening torque 11 37 3AZ .

NOTE: A further screw, which cannot be seen in the picture, must be released under the electric servomotor (4).

Release screw on electric servomotor.

Tightening torque 11 37 3AZ .

Remove servomotor (4) in direction of arrow.

Fig 1: Pulling Off Metal Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, release nuts (5).

Tightening torque 11 72 1AZ .

If necessary, remove secondary air valve (6).

IMPORTANT: Observe different screw lengths.
Installation location of screws (1 and 2) is specified by the different bushing shapes.

Release screws in area (1).

Tightening torque 11 12 5AZ .

Installation:

Replace aluminum screws.

Release threaded pin (2).

Tightening torque 11 12 5AZ .

Installation:

Replace aluminum screws.

Fig 2: Identifying Cylinder Head Gasket Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Slotted sleeves (2) for guiding ignition coils in cylinder head cover (1) must be replaced.

Remove slotted sleeves (2).

Fig 3: Identifying Cylinder Head Cover And Slotted Sleeves

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Installation:

Clean all sealing faces (1 and 2).

IMPORTANT: Do not use any metal-cutting tools.

Installation:

Replace gaskets (1 and 2).

Fig 4: Identifying Seal On Sealing Faces

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.