E
CAMSHAFT AND VALVES
POWR
2 The valve seat is in the middle of the valve
face, but is too narrow.
3 The valve seat is too narrow and is near the
valve margin.
4 The valve seat is too narrow and is near the
bottom edge of the valve face.
5-29
Valve seat cutter set Desired result
First: To achieve a
Use
90° cutter Centered valve
Second: seat with the
45° cutter proper width.
Valve seat cutter set Desired result
First: To center the
Use
30° cutter valve seat and
Second: increase its
45° cutter width.
Valve seat cutter set Desired result
To achieve a
Use 45° cutter uniform valve
seat width.
2
3
4
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