SERVICING
Replacing Valve Guide
(When
removing)
1.
Using a valve guide replacing tool, press out the used valve
guide.
(When
installing)
1.
Clean a new valve guide, and apply engine oil
to
it.
2.
Using a valve guide replacing tool, press
in
a new valve guide
until it is
flush with the cylinder head as shown.
3. Ream
precisely the I.D. of the valve guide
to
the specified
dimension .
•
IMPORTANT
•
Do
not
hit
the
valve
guide
with
a
hammer,
etc.
during
replacement.
(AI
When ,emoving
Correcting Valve and Valve Seat
•
NOTE
(8) When Inslalling
•
Before
correcting
the
valve and seat,
check
the
valve
stem
and
the
1.0.
of
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 1.047
rad
(60
0)
(intake
valve)
or
0.785 rad (45
0)
(exhaust valve) seat cutter (Code
No.
07909-33102) .
2.
Resurface the seat surface with a 0.523 rad (30
')
valve seat
cutter to intake
valve seat and with a 0.262
rad
(15
')
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
valve seat, and fit them with valve lapping tool.
4.
Check the valve seating with prussian blue. The valve seating
surface
should show good contact ali the way around.
(a) Identical Dimensions
(bl
Valve Seal Wldlh
(c)
0.523 rad (30 • )
or
0.262 rad (15 • )
(d)
0.262
rad
(15 ' )
or
0.523 rad (30 • )
(e)
0.785
,ad
(45
• )
or
1.047
,ad
(60 • )
(A)
Check Conlacl
(8) Correcl Seal Wldlh
(C)
Check Conlacl
A
f5
~
L
"~M
. ..l
VALVE
GUIDE
~
:;
-
J
(A) (8)
REMOVING
INSTALLING
RESURFACING
Engines & Generators
42
'-
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