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

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Remachining on cylinder head max. 0.3 mm

Necessary preliminary tasks:

Remove CYLINDER HEAD .
Remove EXHAUST CAMSHAFT .
Remove INTAKE CAMSHAFT .
Remove ROLLER CAM FOLLOWERS .
Remove all VALVES .

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 Evenness Using Standard Straight-Edge

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 Evenness Using Standard Straight-Edge

Courtesy of BMW OF NORTH AMERICA, INC.

Check cylinder head for WATER LEAKS .

Assemble engine.