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
