B - Valve seat width
F - Valve guide
H - Height of the edge of the valve
S - Valve seat sleeve
V - Valve
Z - Cylinder head
Valves with reduced H edge height must be replaced. Exhaust valve: H = 2.0 mm; inlet valve: H = 1.3 mm.
When machining the valve seat, ensure the specified width by machining the correction angle.
Dimensions during processing: B = 1.65±0.35 mm; a - 15°; b - 45°; 9-75°.
Finally, grind the valves.