Valve Inspection - Honda Accord 2008 Manual

Valve Inspection
1. R e m o v e t h e v a l v e s ( s e e p a g e 6-48).
2. M e a s u r e t h e v a l v e i n t h e s e a r e a s .
I n t a k e V a l v e D i m e n s i o n s
A S t a n d a r d ( N e w ) : 3 5 . 9 0 — 3 6 . 1 0 m m
( 1 . 4 1 3 - 1 . 4 2 1 in.)
B S t a n d a r d ( N e w ) : 1 1 6 . 5 5 - 1 1 7 . 1 5 m m
( 4 . 5 8 9 - 4 . 6 1 2 in.)
C S t a n d a r d ( N e w ) : 5 . 4 8 5 — 5 . 4 9 5 m m
( 0 . 2 1 5 9 - 0 . 2 1 6 3 in.)
C S e r v i c e L i m i t :
5 . 4 5 5 m m ( 0 . 2 1 4 8 in.)
E x h a u s t V a l v e D i m e n s i o n s
A S t a n d a r d ( N e w ) : 2 9 . 9 0 — 3 0 . 1 0 m m
( 1 . 1 7 7 - 1 . 1 8 5 in.)
B S t a n d a r d ( N e w ) :
C S t a n d a r d ( N e w ) :
C S e r v i c e L i m i t :
1 1 3 . 9 0 - 1 1 4 . 5 0 m m
( 4 . 4 8 4 - 4 . 5 0 8 in.)
5 . 4 5 0 — 5 . 4 6 0 m m
( 0 . 2 1 4 6 - 0 . 2 1 5 0 in.)
5 . 4 2 0 m m ( 0 . 2 1 3 4 in.)
Valve Stem-to-Guide Clearance
Inspection
1. R e m o v e t h e v a l v e s ( s e e p a g e 6-48).
2. S l i d e t h e v a l v e o u t o f i t s g u i d e a b o u t 10 m m
(0.39 i n . ) , t h e n m e a s u r e t h e s t e m - t o - g u i d e
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 t h r u s t ( w o b b l e
m e t h o d ) .
• If t h e 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 it u s i n g a n e w v a l v e .
• If t h e 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 , r e a s s e m b l e u s i n g a n e w v a l v e .
• If t h e m e a s u r e m e n t w i t h a n e w v a l v e s t i l l
e x c e e d s t h e s e r v i c e l i m i t , g o t o s t e p 3.
I n t a k e V a l v e S t e m - t o - G u i d e C l e a r a n c e
S t a n d a r d ( N e w ) : 0 . 0 4 — 0 . 0 9 m m
( 0 . 0 0 2 - 0 . 0 0 4 in.)
S e r v i c e L i m i t : 0.16 m m ( 0 . 0 0 6 in.)
E x h a u s t V a l v e S t e m - t o - G u i d e C l e a r a n c e
S t a n d a r d ( N e w ) : 0 . 1 1 — 0 . 1 6 m m
( 0 . 0 0 4 - 0 . 0 0 6 in.)
S e r v i c e L i m i t : 0 . 2 2 m m (0.009 in.)
3. S u b t r a c t t h e O . D . o f t h e v a l v e s t e m , m e a 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 I.D. o f 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 a b a l l
g a u g e . T a k e t h e m e a s u r e m e n t s i n t h r e e p l a c e s
a l o n g t h e v a l v e s t e m a n d t h r e e p l a c e s i n s i d e t h e
v a l v e g u i d e . T h e d i f f e r e n c e b e t w e e n t h e l a r g e s t
g u i d e m e a s u r e m e n t a n d t h e s m a l l e s t s t e m
m e a s u r e m e n t s h o u l d n o t e x c e e d t h e s e r v i c e l i m i t .
I n t a k e V a l v e S t e m - t o - G u i d e C l e a r a n c e
S t a n d a r d ( N e w ) : 0 . 0 2 0 — 0 . 0 4 5 m m
( 0 . 0 0 0 8 - 0 . 0 0 1 8 in.)
S e r v i c e L i m i t : 0.08 m m (0.003 in.)
E x h a u s t V a l v e S t e m - t o - G u i d e C l e a r a n c e
S t a n d a r d ( N e w ) : 0 . 0 5 5 — 0 . 0 8 0 m m
( 0 . 0 0 2 2 - 0 . 0 0 3 1 in.)
S e r v i c e L i m i t : 0.11 m m (0.004 in.)
6-49