Replacing cylinder head gasket (B48 and B46 engine) (Cooper S and John Cooper Works)

Special tools required:

11 4 470

Preliminary work needed:

Remove CYLINDER HEAD .
Check CYLINDER HEAD FOR WATERTIGHTNESS .
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).

Courtesy of BMW OF NORTH AMERICA, INC.

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

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note:

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

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install the CYLINDER HEAD .
Assemble engine