11 12 005 Removing and installing / sealing left cylinder head cover (N62)

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

(Cylinder Bank 5 To 8)

Remove design cover

Remove acoustic cover

Remove center engine compartment partition wall

Remove ignition coil cover. See Figure.

NOTE: For purposes of clarity, the following work steps are shown on the engine after it has been removed.

Installation:

The cylinder head cover and its gasket are made from a single material which adapts to the contour of the cylinder head.

The gasket and uncoupling elements of the screw connection are matched to each other.

If the cylinder head cover was leaking, the fault can only be rectified with a new cylinder head cover, new gasket and new screw connections.

Unclip cable holder (1) with cables.

Pull tank venting valve (2) off holder.

Fig 1: Unclipping Cable Holder With Cables And Removing Tank Venting Valve

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Unlock plug (1) and remove.

Fig 2: Removing Plug

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Release screws and remove sealing element (2).

Remove sensors (3 and 4).

Installation:

Replace sealing element (2).

Replace sealing rings on sensors (3 and 4).

Fig 3: Replacing Sealing Rings On Sensors

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Remove ignition coils. See IGNITION COIL .

Release both grounding cables.

Unlock and detach vent hose.

Unclip cable duct (1) and remove cable from holder.

Fig 4: Unclipping Cable Duct And Removing Cable From Holder

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Remove servomotor for left eccentric shaft.

Unfasten screws.

Remove spacer (3) upwards.

Installation:

Replace sealing ring.

Fig 5: Removing Spacer

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Remove injection pipe

Release screw connections (1, 2, 3 and 4).

If necessary, pull out oil dipstick.

Remove cylinder-head cover.

Fig 6: Removing Cylinder Head Cover

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Installation:

Note installation direction of sealing ring (1).

Groove in sealing ring (1) points outwards.

Fig 7: Identifying Groove In Sealing Ring

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Replace sealing ring (1) and press into cylinder head cover until flush.

Fig 8: Installing Sealing Ring Into Cylinder Head Cover

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Installation:

Replace seal (1).

Align gasket (1) loosely in cover groove. Starting at corner radii, secure gasket (1) in cover groove and press into groove so that it is free of tension.

Fig 9: Aligning Gasket In Cylinder-Head Cover Groove

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Installation:

Replace spark plug domes.

Coat rubber seals on spark plug dome (1) with anti-friction rubber coating.

Fig 10: Coating Rubber Seals On Spark Plug Dome

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Installation:

Install spark plug domes in cylinder head.

When Fitting Cylinder Head Cover:

Align spark plug domes to cylinder head cover.

Fig 11: Installing Spark Plug Domes In Cylinder Head

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Installation:

Clean seal residue from sealing surfaces.

Coat contact surfaces of joint with Drei Bond 1209.

Fig 12: Coating Contact Surfaces Of Joint With Drei Bond 1209

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Installation:

Clean seal residue from sealing surfaces.

Apply a thin, uniform bead of Drei Bond 1209 sealing agent to transition area of half-moon sections.

Fig 13: Applying Thin Uniform Bead Of Drei Bond 1209 Sealing Agent

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Replace sealing elements (1).

Fig 14: Replacing Sealing Elements

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Installation:

Make sure gasket is correctly seated at sides and on rear side of cylinder head.

Fig 15: Identifying Proper Seating Of Gasket

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Installation:

Screw connections (1, 2, 3 and 4) of cylinder head cover are different.

Replace screw connections (3).

Insert screw connections (1, 2 and 3) without pretension and align cover.

Tighten down screw connections (1, 2 and 3) in diagonal sequence from inside to outside.

Fig 16: Tightening Screw Connections Of Cylinder Head Cover

Courtesy of BMW OF NORTH AMERICA, INC.