Valve Installation; Valve Guides; Valve Movement - Acura Integra 1998 Service Manual

Valve Installation
'alve Inslallauon
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W h e n i n s t a l l i n g v a l v e s i n t h e c y l i n d e r h e a d , c o a t
valve stems with oil belore inserting them into valve
g u i d e s , a n d m a k e s u r e v a l v e s m o v e u p a n d d o w n
smoothly.
W h e n v a l v e s a n d s p r i n g s a r e i n p l a c e , l i g h t l y t a p t h e
end of each valve stem two or three times to ensure
proper seating of valves and valve keepers (use plas
tic mallet).
NOTE: Tap the valve stem only along lts axrs so you
do not bend the stem.
PLASTIC MALLET
Valves, Valve Springs and
Valve Seals
Valve
Valve
Guides
Movement
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L
valve tvtovemenr -
M e a s u r e t h e g u i d e t o s t e m c l e a r a n c e w i t h a d i a l i n d i c a -
t o r w h i l e r o c k i n g t h e s t e m i n t h e d i r e c t i o n o f n o r m a l
thrust {wobble method).
lntake Valve Stem-to-Guide Clearance:
Standard {Newlr 0.04 - 0.10 mm
10.002 - 0.004 in)
Service Limit: 0.16 mm {0.005 in)
Exhaust Valve Stem-to-Guide Clearance:
S t a n d a r d { N e w } : 0 . 1 0 - 0 . 1 6 m m
(0.004 - 0.006 inl
Service Limit:
0.22 mm (0.009 in)
V a l v e e x t e n d e d 1 0 m m o u t f r o m s e a t
l f m e a s u r e m e n t e x c e e d s t h e s e r v i c e l i m i t , r e c h e c k
u s r n g a n e w v a l v e .
l f m e a s u r e m e n t i s n o w w i t h i n t h e s e r v i c e l i m i t ,
reassemble using a new valve.
l f m e a s u r e m e n t s t i l l e x c e e d s l i m i t , r e c h e c k u s i n g
a l t e r n a t e m e t h o d b e l o w , t h e n r e p l a c e v a l v e a n d
guide, if necessary.
NOTEr An alternate method of checking guide to stem
clearance is to subtract the O.D. of the valve stem, mea-
s u r e d w i t h a m i c r o m e t e r , f r o m t h e l . D . o { t h e v a l v e
g u i d e , m e a s u r e d w i t h a n i n s i d e m i c r o m e t e r o r b a l l
g a u g e .
Take the measurements in three places along the valve
stem and three places inside the valve guide.
The diiference between the largest guide measurement
and the smallest stem measurement should not exceed
the service limit
lntake Valve Stem-to-Guide Clearance:
Standard (Newl: 0.02 - 0.05 mm
10.001-{.002 inl
Service Limit:
0,08 mm (0.003 in)
Exhaust Valve Stem-to-Guide Clearance:
Standard (New): 0.05 - 0.08 mm
{0.002 - 0.003 in)
Service Limit: 0.11 mm {0.004 in)
\