11 12 719 Grinding cylinder head sealing surface (N62/N62TU)

WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

(Cylinder Head Dismantled)

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

NOTE: Maximum plane deviation: longitudinal 0.10 mm.

Fig 1: Checking Evenness Of Cylinder Head Using Straight-Edge

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Maximum plane deviation: transversal 0.05 mm.

Machining limit. Refer to ENGINE - TECHNICAL DATA- 545I (4.4L) E60/N62 .

Fig 2: Identifying Maximum Plane Deviation (Transversal)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Thicker Cylinder Head Seal

Courtesy of BMW OF NORTH AMERICA, INC.