3-38 ENGINE
• If the valve seat is pitted or burned, use the 45° cutter to con-
dition the seat some more.
NOTE:
Cut only the minimum amount necessary from the seat to pre-
vent the possibility of the valve stem becoming too close to the
camshaft.
TOP NARROWING CUT
• If the contact area W is too high on the valve, or if it is too
wide, use the 15° (for the exhaust side) and the 30° (for the
intake side) to lower and narrow the contact area.
BOTTOM NARROWING CUT
• If the contact area W is too wide or too low, use the 60° cutter
to narrow and raise the contact area.
15˚
30˚
60˚
SAMPLE
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