11 12 000 Removing and installing/sealing cylinder head cover (N20)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary work:

NOTE: E89 only

The overview shows the removed engine for better clarity.

Release sheet metal nuts (1).

Unfasten screws (2).

Remove heat shield (3).

Fig 1: Identifying Heat Shield And Screws

Unclip oxygen sensor connector (1) from holder and disconnect plug connection.

Fig 2: Identifying Oxygen Sensor Connector

Release screws (1).

Remove flange (2).

Fig 3: Identifying Flange And Screws

Disconnect plug connection (1) from the electro-pneumatic pressure converter (3).

Remove vacuum line (OUT).

Undo screws (2) and put electro-pneumatic pressure converter to one side.

Fig 4: Disconnecting Plug Connection From Electro-Pneumatic Pressure Converter

Unfasten engine wiring harness (1) at cylinder head cover.

Fig 5: Identifying Engine Wiring Harness

Unfasten engine wiring harness (1) at cylinder head cover.

Unscrew cable channel (2) from the cylinder head cover.

Unclip the cable channel (3) from the cylinder head cover.

Fig 6: Identifying Engine Wiring Harness And Cable Channel

Fig 7: Cylinder Head Cover Bolts Tightening/Loosening Sequence (N20)

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

Remove cylinder head cover.

Replace all gaskets.

Clean sealing surfaces at the contact surfaces of the cylinder head and the spark plug channels.

Installation note:

Pay attention when placing cylinder head cover on centring pin (1)

Fig 8: Identifying Cylinder Head Centering Pin

Fig 9: Cylinder Head Cover Bolts Tightening/Loosening Sequence (N20)

Fit cylinder head cover.

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

Tighten the cylinder head cover screws in sequence (1 to 20).

Tightening torque: 11 12 4AZ.

NOTE: Assemble engine.

Check engine for leak tightness.