11 12 719 Resurfacing cylinder head lower face (N18)

Necessary preliminary tasks:

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

NOTE: Max. deviation from flatness (longitudinal) 0.10 mm
Illustration shows N43.

Fig 1: Checking Evenness Of Cylinder Head Lower Face (Longitudinal)

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Max. deviation from flatness (transverse) 0.05 mm
Illustration shows N43.

Fig 2: Checking Evenness Of Cylinder Head Lower Face (Transverse)

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATERTIGHTNESS .