Milling cylinder head sealing surface (B48 and B46 engine) (Cooper S and John Cooper Works)

Preliminary work needed: 

• Remove CYLINDER HEAD .
• Check CYLINDER HEAD FOR WATERTIGHTNESS .

Check evenness of cylinder head sealing surface with a standard straightedge (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Check evenness of cylinder head sealing surface with a standard straightedge (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: 

• Install the CYLINDER HEAD .