Valve Seat: Service and Repair

(cylinder head dismantled)





Machine valve seat face with special tool 00 3 520 or 00 3 580 with specification of tool manufacturer.






Note:
After machining the outer and inner diameters of the valve seat face with a correction milling tool, rework to the specified diameter until the correct valve seat width (5) is obtained.
1 Valve Seat Angle
2 Correction Angle, Outside
3 correction Angle, Inside
4 Outside Diameter Seat Face
5 Valve Seat Width
Specified values for 1 through 5 refer to Engine, Specifications.