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Å
ı
Ç
Î
INSPECTION AND REPAIR
*********************************
Refacing steps:
Å Valve seat is centered on the valve face but it
is too wide.
Valve seat cutter set
Use
lightly
ı Valve seat is in the middle of the face but it is
too narrow.
Valve seat cutter set
Use
Ç Valve seat is too narrow and it is near valve
margin.
Valve seat cutter set
Use
Î Valve seat is too narrow and it is located near
the bottom edge of the valve face.
Valve seat cutter set
Use
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5.Lap:
Valve face
Valve seat
NOTE:
After refacing the valve seat or replacing
the valve and valve guide, the valve seat
and valve face should be lapped.
4 - 18
ENG
Desired result
To reduce valve
45° cutter
seat width to
60° cutter
1.0 mm (0.039 in).
Desired result
To achieve a uni-
form valve seat
45° cutter
width of 1.0 mm
(0.039 in).
Desired result
First:
To center the seat
30° cutter
and to achieve its
Second:
width of 1.0 mm
45° cutter
(0.039 in).
Desired result
First:
To center the seat
60° cutter
and increase its
Second:
width.
45° cutter
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