Acura 2002 RSX Service Manual page 155

Cylinder Head
Valve Guide Replacement
Special Tools Required
. V a l v e g u i d e d r i v e r , 5 . 5 m m 0 7 7 4 2 - 0 0 1 0 1 0 0
. V a l v e g u i d e r e a m e r , 5 . 5 m m 0 7 H A H - P J 7 O 1 O B
1. Inspect valve stem-to-guide clearance (see page 6-
37 t.
2 . A s i l l u s t r a t e d b e l o w , 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
air-impact valve guide driver (A) modified to f it the
diameter of the valve guides. ln most cases, the
same procedure can be done using the specialtool
a n d a c o n v e n t i o n a l h a m m e r .
A
/
5 . 3 m m
/
l o z t i n 1
^ l
L
(\
r--
-_l]]l
- . _ 8 7 m m
_
5 7 m m
-
(3.43 in.)-
12.24in.l
-
1 0 . 8 m m
{0.42 in.}
4 .
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
a b o u t a n h o u r .
Use a hot plate or oven to evenly heat the cyl'nder
head to 300"F (150'C). Monitor the temperature
with a cooking thermometer. Do not get the head
hotter than 300"F ('150"C); excessive heat may
loosen the valve seats.
6-38
5. Working from the camshaft side, use the driver and
a n a i r h a m m e r t o d r i v e t h e g u i d e a b o u t 2 m m ( 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
e a s i e r . H o l d l h e a i r h a m m e r d i r e c t l y i n l i n e w i t h t h e
valve guide to prevent damaging the driver.
6. Turn the head over, and drive the quide out toward
the camshaft side of tte head.
7 . l f a v a l v e g u i d e w o n ' t m o v e , d r i l l i t o u t w i t h a 8 m m
i 5 l 1 6 i n c h ) b i t , t h e n t r y a g a i n . D r i t t g u i d e s o n t y i n
e x t r e m e c a s e s ; y o u c o u l d d a m a g e t h e c y l i n d e r
h e a d i f t h e g u i d e b r e a k s .
Remove the new guide(s) from the freezer, one at a
ttme, as you need them.