11 12 719 Grinding cylinder head sealing surface (N63)

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Remove cylinder head . See 11 12 105 REMOVING AND INSTALLING LEFT CYLINDER HEAD (N63) or 11 12 106 REMOVING AND INSTALLING RIGHT CYLINDER HEAD (N63) .

Cylinder head disassembled:

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

NOTE: Maximum deviation from flatness: longitudinal 0.10 mm.

Fig 1: Checking Evenness Of Cylinder Head Lower Face Using Standard Straightedge

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Maximum deviation from flatness: transversal 0.05 mm.

Machining limit . See CYLINDER HEAD WITH VALVE SEAT COVER or CYLINDER HEAD WITH LID, BMW, N63, B44 .

Fig 2: Checking Maximum Deviation From Flatness
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: A cylinder head gasket (+REP) 0.3 mm thicker than usual can be obtained for machined (resurfaced) cylinder heads.

Fig 3: Identifying Cylinder Head Gasket (+REP)

Courtesy of BMW OF NORTH AMERICA, INC.