11 12 719 Milling cylinder head lower face (N20, N26)

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Necessary preliminary tasks:

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

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 With Standard Straightedge (Longitudinal)

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 With Standard Straightedge (Transverse)

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATERTIGHTNESS .

Assemble engine.