Valve Seat: Service and Repair

For regrinding the valve seats, use a cutter set with T- wrench, guide spindle tool No. 83 93 928, or equivalent, and grinding tools No. 83 93 936 (60°) and 78 61 040 (45°), or equivalent.
- Valve seat angles for inlet and exhaust valves: 45°.
- Regrinding (narrowing) angle: 60°.
- Valve seat width:
Inlet valve: 1.0-1.5 mm.
Exhaust valve: 1.5-2.0 mm.