11 12 719 Resurfacing cylinder head sealing surface (M52 / M52TU / M54 / M56)

WARNING: This page is about a different car, the 2005 BMW 530i, 2005 BMW 525i, 2004 BMW 530i, and 2004 BMW 525i. However, it is still accessible from the selected car via links, so may be relevant.

(cylinder head dismantled)

Check flatness of cylinder head sealing surface with a commercially available straightedge.

Deviation from flatness max. 0.05 mm.

Fig 1: Checking Flatness Of Cylinder Head Sealing Surface

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Machining limit. See ENGINE - TECHNICAL DATA - 525i & 530i .

Fig 2: Locating Machining Limit

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For compression comparison check, a repair cylinder head seal is provided.

Fig 3: Locating Cylinder Head Seal

Courtesy of BMW OF NORTH AMERICA, INC.