11 12 719 Milling cylinder head sealing surface (N54, N54T)

IMPORTANT: Remachining on cylinder head max. 0.3 mm

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 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 Cylinder Head Sealing Faces Using Standard Straightedge

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATER LEAKS .

Assemble engine.