Valve Seat Reconditioning - Honda Accord 2008 Manual

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Valve Seat Reconditioning
1. I n s p e c 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 (see p a g e
6 - 4 9 ) . If t h e v a l v e g u i d e s a r e w o r n , r e p l a c e t h e m
( s e e p a g e 6 - 5 0 ) b e f o r e c u t t i n g t h e v a l v e s e a t s .
2 . R e n e w t h e v a l v e s e a t s i n t h e c y l i n d e r h e a d u s i n g a
v a l v e s e a t c u t t e r .
3. C a r e f u l l y c u t a 4 5 ° s e a t , r e m o v i n g o n l y e n o u g h
m a t e r i a l t o e n s u r e a s m o o t h a n d c o n c e n t r i c s e a t .
4. B e v e l t h e u p p e r a n d l o w e r e d g e s a t t h e a n g l e s
s h o w n i n t h e i l l u s t r a t i o n .
C h e c k t h e w i d t h o f t h e s e a t a n d a d j u s t a c c o r d i n g l y .
5. M a k e o n e m o r e v e r y l i g h t p a s s w i t h t h e 4 5 ° c u t t e r
t o r e m o v e a n y p o s s i b l e b u r r s c a u s e d b y t h e o t h e r
c u t t e r s .
V a l v e S e a t W i d t h
S t a n d a r d ( N e w ) : 1 . 2 5 - 1 . 5 5 m m ( 0 . 0 4 9 - 0 . 0 6 1 in.)
S e r v i c e L i m i t :
2.00 m m (0.079 in.)
6-52

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