Suzuki LT-4WD 1990 Service Manual page 422

P I S T O N - C Y L I N D E R C l E A RA N C E
A s a r e s u lt o f t h e p r e v i o u s m e a s u re m e nt , i f t h e p i st o n to
c y l i n d e r c l e a r a n c e exceeds the l i m it s h o w n b e l o w , o v e r h a u l
t h e c y l i n d e r a n d u s e a n o v e r s i z e p i sto n , o r re p l a c e b o t h
c y l i n d e r a n d p i sto n .
S e rvice l i m it : 0 . 1 20 m m ( 0 . 0047 i n )
P I S T O N R I N G -G R O O V E C l E A RA N C E
M e a s u re t h e s i d e c l e a ra n ce o f t h e 1 st a n d 2 n d r i n g s w i t h a
t h i c k n e s s g a u g e . I f a n y of t h e c l e a ra n ce s e x c e e d s t h e l i m it ,
re p l a c e b o t h p i st o n a n d p i st o n r i n g s .
0 9 9 0 0 - 2080 3 : T hickness g a u g e
NO TE:
Using a soft metal scraper, decarbon the cro wn of the pis ton .
Clean th e ring groo ves similarly.
Piston r i n g -groove clearance
Service Limit 1 st : 0 . 1 80 m m ( 0 . 0 0 7 1 i n )
2 n d : 0 . 1 50 m m ( 0 . 00 5 9 i n )
Piston r i n g groove w i d t h
P i s t o n r i n g
1 st 1 . 0 1 - 1 . 0 3 m m ( 0 . 040 - 0 . 04 1 i n )
2 n d 1 . 2 2 - 1 . 2 4 m m ( 0 . 0 4 8 - 0 . 0 4 9 i n )
O i l 2 . 0 1 - 2 . 0 3 m m ( 0 . 0 7 9 - 0 . 0 8 0 i n )
Piston r i n g t h i ckness
Pisto n ring
1 st 0 . 9 7 - 0 . 9 9 m m ( 0 . 0 3 8 - 0 . 0 3 9 i n )
2 n d 1 . 1 7 - 1 . 1 9 m m ( 0 . 04 6 - 0 . 04 7 i n )
P I ST O N R I N G F R E E E N D G A P A N D
P I S T O N R I N G E N D G A P
B e f o r e i n sta l l i n g p i st o n r i n g s , m e a s u re t h e f r e e e n d g a p o f
e a c h r i n g w i t h a ve r n i e r c a l i p e rs .
N ext, f i t the r i n g i n t h e cy l i n d e r , a n d m e a s u re e a c h r i n g e n d
g a p w it h a t h i c k n e s s g a u g e .
I f a n y r i n g h a s a n e x c e s s e n d g a p , re p l a c e t h e r i n g .
Piston r i n g free e n d g a p
Service limit 1 st : 6 . 2 m m ( 0 . 24 i n )
2 n d : 7 . 3 m m ( 0 . 2 9 i n )
Sta n d a rd
Sta n d a rd
L T·F4WDXM ('91 -MODEL) 1 5-20