Valve Seat: Service and Repair

Remachining Valve Seats

1. Valve seats can be remachined, for example, with the Neway valve milleror the Hunger valve seat turning tool.

2. Remachine the valve seats with a 45° seat milling cutter. Then machine the seat to the prescribed width with a 60° correction milling cutter. A 30° correction milling cutter is not required.

Intake seat width 1.5 mm
Exhaust seat width 1.8 mm





3. Valve seat milling cutter, e.g.
Neway 234 45°
Neway 213 60°













4. Valve seat turning tool, e.g. Hunger VDSNL 1/45 I.K.





5. After milling, grind in the valve seats lightly with grinding paste. Check the contact pattern of the valve seat surface.