Replacement - Honda Prelude 1993 Service Manual

- Replacement
1. As illustrated in the removal st6ps of this procedure,
use a commercially-available air-impact ddver at-
tachment modified to fit tho diameter of the valve
guides. ln most cases, tho same procedure can be
done using the Valve Guide Oriver and a conv€ntional
nammer.
VALVE GUIDE ORIVER
COMMERCIALIY AVAILABLE
RcmovC .nd lrddlrtlon
VALVE GUIDE DR|VER. 8.5 mm
07742-0Or0100
Select the proper replacement guidos snd chillthem in
the treezer section ot a refrigerator Jor about an hour.
Use a hot plste or oven to evenly heattha cylinder head
to 3OOoF (150oC). Monitor the temperature with a
cooking thermometer.
CAUTION:
. Oo mt uso a tordr; h may wrp thc hoad.
. Do not glt dro he.d hotter rhan 3{X)oF fi5oocl:
oxccsslvc hoat may looaan tl|c vdw rcat3.
a To avoid brrB. uco heavy gbves whon hsnding
tho hoad cyrer
h.ad.
eck
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and
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eler
alve
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nor
4. Working trom the camshaft side. Use the driver and an
air hammer to drive the guide about 2 mm {0.1 in)
towards the combustion chamber. This will knock off
some of the carbon and make removal easier.
GAUTION:
o AlwEys woar satsty goggles or a face shiold when
uCng tha air hamnr6r.
. Hold th6 ak hdnmcf dkecdy in lina wlth iha valv€
guue to prev€ni darnaglng th€ driv$.
5. Turn the head over and drive the guide out toward the
camshaft side of head.
lf a valveguide stillwon't move, drillit out with a I mm
(5/16 inch) bh, then try again.
CAUTION: Ddd gridos only in €xtr€m6 casas; you
couH damago tho cytndcr hoad if ths guilo breaks.
6.
Remove the new guide(s) from the refrigerator, one at
8 time, as you need them.
(cont'dl
c ) o
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