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CYLINDER HEADNALVES
Reface
thfJ
seat Use a
45°
seal
cutter,
remove any roughness or
with
a
45°
cutler
irregularities from the seat.
whsTI6ver
8
valve
guide
Is
replaced.
TOOLS
:
Seat cutter,
27.5 mm
(45-
IN)
07780-0010200
Seat cutter,
24 mm
(45·
EX)
07780-0010600
Cutter
holder,
5.0 mm
07781-0010400
or
equivalent
commercially available In
U.S.A
.
Use a
32·
flat
culler,
remove the top
114 of
the existing
valve seat malerial.
TOOLS:
Flat
cutter,
27
mm
(32
0
IN)
07780-0013300
Flat
cutter,
22
mm
(32
0
EX)
07780-0012601
Cutter
holder,
5.0 mm
07781-0010400
or equivalent commercially available
In
U.S.A.
Use a
60·
Interior cutter, remove the bottom
1/4
of the
existing valve
seal
material.
TOOLS
:
Interior
cutter,
26
mm
(50·
IN)
07780-0014500
Interior
cutter,
22 mm
(60·
EX) 07780-0014202
Cutter
holder,
5.0 mm
07781-0010400
or equivalent commercially
available
In
U.S.A.
Using
a
45°
seat cu tter, cut the
seat
to the
proper
width.
VALVE
SEAT
WIDTH
:
O.9
-
1.1 mm (0.035-0.043
In)
Make sure thai all pitting and irregularities are removed.
NOTE:
Excessive lapping pressure may deform or damage
the seat.
Change the angle
of
lapping
tool
frequently to
prevent uneven seat
wear.
Do
not allow lapping compound to enter the guides.
I
..........
After
culling the seat, apply lapping compound to the
, - - - -
--
-- - - - - - - - - - - ,
8·22
valve face, and lap the valve using light pressure.
After lapping, wash any residual compound
off
the
cylinder
head and
valve
and recheck the
seat
contact.
Assemble the
cylinder
head
(page
8- 16).
•
•
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Table of Contents
Troubleshooting
