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CYLINDER HEAONALVE
VALVE SEAT INSPECTION
/
REFACING
Clean all
intakl
and exhaust valves thoroughly to
ramove carbon deposiU.
Apply a light cOlting of valve lapping compound
to eleh vI I1I8 face
.
lap each valvI and selt using
I rubber hose or other hand·lapping tool
.
NOTE
:
Take care not to allow the compound to enter
between the valv8 stem and guide. After
lapp-
ing, wash out the compound completely
and
apply a coat of engine oil to the valve faee
and seat.
Remove the vaivi and inspect the face
.
CAUTION
:
The
W1ll1u cannot be
gro und.
If the
l'Owe
{oce
i$
rough, worn
u'lellen/y.
or contacts the
seat improperly.
the
valve must be replDced.
Inspect
the vallll
seat.
If
the seat is too wide, too narrow, or has low
spots,
the seat must be ground
,
NOTE
.
Follow the refacer manufacturer's operating
instructions.
After cutting Ihe seat, apply lapping compound
to the valve face, and lap the vallie using
light
pressure.
After
lapping,
Wish any residual compound off the
cyliodar head and valve
.
IN CUTTER (30.;)
EX
:
CUTIER (2591
IN, EX: CUTTER (30if1)
10-14
,
. .
----
SEAT
WIDTH:
0.99-1.27
mm
(0.039-0.050 iol
SERVICE
LIMIT:
1.5
mm
(0.06
10)
IN:
CUTTER
(2~1
EX:
CUTTER (24.59)
0.99-
1.27
mm
(0.039-0.050 inl
45"
Date
of l$Sue:
May,
1982
©
HONDA MOTOA
CO.,
LTD.
-
-
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Table of Contents
Troubleshooting
