Acura 1994 Integra Service Manual page 131

1 . As illustrated in the removal steps ot this proce-
d u r e . u s e a c o m m e r c i a l l y - a v a i l a b l e a i r - i m p a c t
driver attachment modified to fit the diameter of the
valve guides. In most cases, the same procedure
c a n b e d o n e u s i n g t h e V a l v e G u i d e D r i v e r a n d a
conventional hammer,
COMMCRCIALLY.AVAILABLE
VALVE GUIDE DRIVER
az mm +- sz mm
{3.43 inl
I
tz.zt in)
tfr
10.8 mm
10.42 inl
5.3 mm
(0.21 inl
I
_{l
R.mov.l and In3trll.tion
VALVE GUIDE DRIVER.
5.5 mm
07742 - q)101tt0
S e l e c t t h e p r o p e r r e p l a c e m e n t g u i d e s a n d c h i l l
them in the freezer section of a refrigerator for
about an hour.
Use a hot plate or oven to evenly heat the cylinder
head to 300'F (150"c). Monitor the temperature with
a cooking thermometer.
CAUTION:
. Do not us9 a iorch; it may warp ths hsad.
. Do not get ths head hottor than 300"F (150"C);
excsssivo hgat may loogen the valvo soaG.
. To avoid burns, use hsaw glovo3 whon handling
the heated cylindor h€ad.
Working from the camshaft side, use the driver and
an air hammer to drive the guide about 2 mm (0.1
i n ) t o w a r d s t h e c o m b u s t i o n c h a m b e r . T h i s w i l l
knock off some of the carbon and make removal
easier.
CAUTION:
. Always wear ssfcty gogglos 01 a taca rhiold
whcn using thc air hrmmcr,
. Hold tho.ir hammer diroctly in line with tho
v6lvo goido to prov.nt drmaging tho driv6r.
Turn the head over and drive the guide out toward
the camshaft side of head.
lf a valve guide still won't move, drill it out with a
8.0 mm (5/16 in) bit, then try again.
CAUTION; Drill guid6 only in oxtromc cs3os: you
could dlmsgo tho cylinder hoad if tho guidc brcakr.
VALVE GUIDE DBIVER.
5.5 mm
07742 - 0010100
6.
Remove the new guide(s) from the refrigerator, one
at a time, as vou need them.
(cont'd)
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