11 12 719 Resurfacing cylinder head lower face (N55)

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Necessary preliminary work:

Remove CYLINDER HEAD .
Remove EXHAUST CAMSHAFT .
Remove INTERMEDIATE LEVER on intake side.

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

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

Fig 1: Checking Cylinder Head Lower Sealing Faces Evenness Using Standard Straight-Edge (Longitudinal)

Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 2: Checking Cylinder Head Lower Sealing Faces Evenness Using Standard Straight-Edge (Transverse)

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATERTIGHTNESS .

Assemble engine.