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1 Value guide remover
¢. After installing the valve guide. use 7
mm (0.276 in} roamer {special zo0l) =o
obtain te prover valve clara
¢ After fitting the valve guide into the
cylinder head. be sure to grind the valve
swat, and perform
valve Ispsing
The
valve must he replaced by 6 new one.
6. Grincing thy valve swat
a. The valve seat is subjsct to severe wear
similar co the valve face. Whenever the
valve [ave is (esur'aced, the valve seat
should also ne resurinced at a 45°
angle, In addition. if < new valve guide
has bon
installed (without any valve
repair), te valve seat should be
chocked to guarantee cumnplets swaling
between
the valve face and seat.
(CAUTION
If the valve seat is obviously pitted or
worn, it should be cleaned with # valve
seat cutter. Use the 45° cutter, and
when twisting the cutter, keep an even
downward pressure to pravent chatter
marks.
«
Hf cutting secuun "A" of the intake valve
seat, Use "FLAT" cutter (radius cutter
If curing section "A" of she exhaust
valve seat. use
"FLAT" cutter (also
radiusedt
ting section "B", use the 30° cut-
sting section "C" uso the 48° cut-
tor
Measure valve seat width.
Apply
mechanic's bluing dye (such as Dyker}
10 the valve face, apply @ very smal
amount of fine grinding cempound
around the surface of the valve swat, in-
'sort the valve ito position,
and spin the
valve quickly beck and forth.
Litt the
valve, clean off all grinding compound,
ard check valve seat width,
The valve
seat wil have removec tne blusing
wnersver it contactad the valve face.
Measure
the seat width
with vernier
calipers. It should measure s92ruxi
mately 1.1 mm (©.043 in). Also. the
seat should be uniform in contact area.
if valve seat width varies. or if pits stil
'exist, then continue to cut with the 45"
cutter. Remove just enough material to
achieve a satisfactory saul,
If the value seat is uniform around the
porimoter of the valve face, but js too
wide or 7c?
'edian the valve face,
it must be alored,
Use either the
"FLAT", 45°, or 30° cutters to comect
the improper seat location in ths man.
ner described below:
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