Installation Instructions
81700·82100'82400
WSM,11770
1
ENGINE
0087F056
O,26rad'1==~~~~i~
15°
0087F057
0.79rad,
45°
(30°)
Correcting Valve and Valve Seat
II
NOTE
• Before correcting
the
valve and seat, check
the
valve stem
and the I.D.
of
the
valve guide section, and repair
them
if
necessary.
•
After
correcting
the
valve seat,
be
sure
to
check
the
valve
recessing.
1} Correcting Valve
1.
Correct
the
valve
with
a valve refacer.
2} Correcting Valve Seat
1.
Slightly correct
the
seat surface
with
a 60
0
(Intake valve)
or
45
0
(Exhaust valve) seat cutter
(1)
(Code No: 07909-33102).
2. Resurface
the
seat surface
with
30
0
valve seat cutter
to
intake
valve seat and
with
15
0
valve seat cutter
to
exhaust valve
seat
so
that
the
width
is
close
to
specified valve seat
width.
(2.12 mm 0.0835 in.)
3.
After
resurfacing
the
seat, inspect
for
even valve seating,
apply a
thin
film
of
compound between
the
valve face and
the
valve seat, and
fit
them
with
valve lapping tool.
4.
Check
valve sealing
with
prussian blue,
the
valve seating
surface should show good contact all
the
way around.
A
~
B \ Intake
~-
O.52rad
;&'M;:,~'\
- 30°
=/i(;,
\ Exhaust
::.<:::'
0.26rad.
15°
[AI
Check
Contact
[BI
Correct
Seat
Width
(a) Identical Dimensions
[CI
Check
Contact
(b) Valve Seat Width
~
.c
~;'J::~
(b) (
a)
........
0087F058
0321F202
Valve
lapping
1.
Apply compound on
the
valve face evenly.
2.
Put
the
valve on its seat hold
it
with
the
valve lapper.
3.
Turn and flap
the
valve back and
forth
on
the
valve seat
to
lap.
4.
Remove
the
compound and clean
the
valve and
the
seat.
5.
Apply
oil on
the
valve face and finish
to
complete
fitting.
6.
Repeat lapping until
the
valve
seats
correctly, checking
the
seating.
1-533