3-
26
ENGINE
VALVE
SEAT WIDTH
•
Coat the valve seat uniformly with prussian blue. Install the
valve and attach a valve lapper onto
it.
Tap
the coated seat
with the
valve face
in
a rotating manner,
in
order
to
obtain a
clear impression of the seating contact.
S 09916-10911 : Valve
lapper
set
• The ring-like dye impression left
on
the valve face must be
"ullliIlUUU~
,
wi1tlUut
any
breaKS
.
In
addition, me widm
01
me
dye ring, which is the valve seat width, must be within the
following specification.
~
Valve seat
width
@J
Standard: 0.9 -
1.1
mm
(0.035 - 0.043 in)
If the valve seat
is
out of specification,
re
-cut the seat.
VALVE
SEAT SERVICING
The
va
l
ve
seats for both the intake and exhaust valves are ma-
chined
to
three
different
angle~
.
T
he
.seat
contac
t surfact:: j::,
L.:ut
at
45
°.
------
In
take Exhaust
45° N-128 N-128
15
° -
N-
1
21
30
°
N-128
-
60°
N-114 N-114
For
USA
S Valve seat
cutter
:
Solid
pilot:
N-114, N-121 ,
and
N-128
N-100-5.0
For
the
other
countr
i
es
S 09916-21110: Valve seat
cutter
set
09916-22420:
Cutter
N-128
09916-22430:
Cutter
N-114
09916-20610:
Cutter
N-
121
09916-24311 :
Solid
pilot
N-100-5.0
N
OTE
:
Use the solid pilot N-100-S.0 along with the valve seat cutters
N-
114,
N-12 1, and N-128.
I A
CAUTION
The valve seat
contact
area
must
be
inspected
after
each
cut
.
intake
ex
haust
lr
,;
I - 45"
1
I
I
I 60'
/~
:
~
1"
" 45.
30
15°
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