11 12 719 Milling cylinder head sealing face (N62/N62TU)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

(cylinder head dismantled)

Check evenness of cylinder head sealing face with a standard straight-edge (1).

NOTE: Maximum plane deviation: longitudinal 0.10 mm.

Fig 1: Checking Evenness Of Cylinder Head Sealing Face

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Maximum plane deviation: transversal 0.05 mm.

Machining limit

NOTE: A cylinder head seal 0.3 mm thicker than usual can be obtained for machined (milled) cylinder heads.

Fig 2: Checking Evenness Of Cylinder Head Sealing Face

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Identifying Thicker Cylinder Head Seal

Courtesy of BMW OF NORTH AMERICA, INC.