11 12 101 Replacing cylinder head gasket (B48B)

WARNING: This page is about a different car, the 2018 BMW 330i xDrive and 2017 BMW 330i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 4 470

Necessary preliminary tasks:

Remove CYLINDER HEAD .
Check CYLINDER HEAD FOR WATERTIGHTNESS
Check CYLINDER HEAD FOR DEVIATION FROM FLATNESS

Remove remnants of oil and dirt from blind holes (1).

IMPORTANT: Work on sealing surface on engine block and on cylinder head with special tool 11 4 470 only.

Do not use any metal-cutting tools (e.g. emery cloth).

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Check adapter sleeves (1) for damage and firm seating.

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The cylinder head gasket (1) can only be checked using the part number.

NOTE: If the cylinder head is re-machined, a thicker gasket (+0.3 mm) is available for Service personnel.

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Required follow-up work:

Installing the CYLINDER HEAD