11 12 527 Remachining a valve seat (M62, S62) (cylinder head dismantled)

WARNING: This page is about a different car, the 2003 BMW X5 and 2002 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: Machining Valve Seat Surface With Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

After machining the valve-seat face on OD and bore diameter, rework to specified diameter with correction milling tool until valve seat width (5) is obtained.

Fig 2: Identifying Valve Seat Angles

Courtesy of BMW OF NORTH AMERICA, INC.