Suzuki LT-4WD 1990 Service Manual page 417

1 5- 1 5
L T-F4WDXM ('91 -MODEL)
VALVE A N D S EA T C O N D I T I O N
VALVE S EAT W I D T H
C o a t t h e v a l ve s e a t w i t h p r u ss i a n b l u e u n if o r m l y .
Fit t h e v a l ve a n d t a p t h e c o ated s e a t w i t h t h e v a l ve f a c e i n
a rotat i n g m a n n e r , i n o r d e r t o o bt a i n a c l e a r i m p r e s s i o n o f
t h e s e at i n g c o n t a c t . I n t h i s o p e ra t i o n , u s e t h e v a l ve l a p p e r
t o h o l d t h e v a l ve h e a d .
T h e r i n g - l i ke d y e i m p re s s i o n l eft o n t h e v a l ve f a c e m u st b e
c o n t i n u o u s - w i t h o u t a n y b re a k . I n a d d i t i o n , t h e w i d t h of t h e
d y e r i n g , w h i c h i s t h e v i s u a l i ze d s e at " w i dt h " , m u st b e with i n
t h e s p e c i f i c a t i o n .
Valve seat w i d t h
Sta ndard @J : 0 . 9 - 1 . 1 m m ( 0 . 0 3 5 - 0 . 04 3 i n )
I f e i t h e r req u i re m e n t i s n ot m e t , c o rrect t h e s e a t b y s e rv i c i n g
it a s fo l l o w s .
VAL VE S EAT S E RV I C I N G
T h e v a l ve seats f o r both i nt a k e a n d e x h a u st v a l ve s a re a n g l e d
t o p re s e n t t w o b e ve l s , 1 5 ° a n d 4 5 ° .
I nt a k e s i d e
4 5 °
N - 6 0 8
1 5 ° N - 2 2 9
F o r U . S . A . m o d e l
N - 1 4 0- 5 . 5
N - 1 0 0- 1 0
For other m o d e l s
0 9 9 1 6- 2 1 1 1 0 : Valve seat c u t t e r s e t
0 9 9 1 6-24900 : Valve seat c u t t e r set
0 9 9 1 6 -2442 0 : Cutter ( N - 1 1 6 )
0 9 9 1 6 - 2 7 7 2 0 : C utter ( N - 2 2 9 )
0 9 9 1 6 - 2 49 3 5 : Cutter ( N - 6 0 8 )
0 9 9 1 6 -2448 0 : S o l i d p i l o t ( N - 1 40 - 5 . 5 )
0 9 9 1 6 -24450 : S o l i d p i l o t ( N - 1 00 - 1 0 )
NO TE:
The valve seat contact area must be inspected a fter each cut.
1 . I n s e rt with a s l i g ht rotat io n , the s o l i d p i l ot that g ives a s n u g
fit . T h e s h o u l d e r o n the p i lot s h o u l d b e a bo u t 1 0 m m ( 0 . 3 9
i n ) f r o m t h e v a l v e g u i d e .
2 . U s i n g t h e 4 5 ° c u tt e r , d e s c a l e a n d c l e a n u p t h e s e a t w i t h
o n e o r two t u rn s .
3 . 1 n s p e c t t h e s e a t b y t h e p re v i o u s s e a t w i dt h m e a s u re m e nt
p ro c e d u re . I f t h e s e a t i s p itted o r b u r n e d , a d d it i o n a l seat
c o n d it i o n i n g with the 4 5 ° c utte r i s req u i re d .
E x h a u s t s i d e
N - 1 1 6
N - 1 1 6
S o l i d p i l ot ( I N . )
S o l i d p i l ot ( E X . )
Valve seat