11 12 527 Remachining a valve seat-cylinder head disassembled (N62)

WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools Required:

00 3 520
00 3 580

Machine valve seat surface with special tool 00 3 520 or with 00 3 580 in accordance with tool manufacturer's instructions.

Fig 1: Machining Valve Seat Surface With Special Tool 00 3 520

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: After machining valve-seat surface: Remachine outside and inside diameters with correction milling tool to the specified diameters until you obtain valve seat width (5).

Valve-seat angle
Correction angle, external diameter
Correction angle, internal diameter
Valve seat, external diameter
Valve seat width

Fig 2: Identifying Valve Seat Diameters Dimension

Courtesy of BMW OF NORTH AMERICA, INC.