11 12 719 Resurfacing cylinder head lower face (N55)

Necessary preliminary tasks:

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

NOTE: Max. deviation from flatness (longitudinal) 0.10 mm

Fig 1: Checking Evenness Of Cylinder Head Sealing Faces Using Standard Straightedge

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Max. deviation from flatness (transverse) 0.05 mm

Fig 2: Checking Evenness Of Cylinder Head Sealing Faces Using Standard Straightedge

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATERTIGHTNESS .

Assemble engine.