11 12 101 Replacing cylinder head gasket (N20, N26)

Special tools required :

11 4 470

Necessary preliminary tasks :

Remove CYLINDER HEAD .
Check cylinder head for DEVIATION FROM FLATNESS .
Check cylinder head for WATERTIGHTNESS .

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.
Graphic shows N55.

Fig 1: Identifying Blind Holes

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Adapter Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation note :

If an oversized gasket is needed, the right part number must be determined as specified by Parts Product Management.

Fig 3: Identifying Cylinder Head Gasket

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.