Suzuki LT-4WD 1990, Service Manual

Page: 422 / 508

P I S T O N - C Y L I N D E R C lE A RA N C E
A s a res u lt o f t h e previous m e a s u re m e nt , i f t h e p i ston to
c y l i n d e r clearance exceeds the l i m it s h o w n b e l o w , overh a u l
t h e cyl i n d e r a n d u s e a n oversize p i sto n , o r re p l ace both
cyl i n d e r a n d p i sto n .
S e rvice limit : 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 lE A RA N C E
M e a s u re the 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 with a
t h i c k n e s s g a ug e . I f a n y of the c l e a ra n ce s exceeds t h e l i m it,
re p l ace both p i ston and p i ston ri n g s .
09900-2080 3 : Thickness gauge
NO TE:
Using a soft metal scraper, decarbon the cro wn of the piston .
Clean the ring groo ves similarly.
Piston ring-groove clearance
Service Limit 1 st : 0 . 1 80 m m (0 . 0 0 7 1 i n )
2nd : 0 . 1 50 m m (0 . 00 5 9 i n )
Piston r i n g groove width
Pisto n ring Sta n d a rd
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 . 048 - 0 . 049 i n )
O i l 2 . 0 1 - 2 . 03 m m ( 0 . 0 7 9 - 0 . 0 8 0 i n )
Piston ring thickness
Pisto n ring
Sta n d a rd
1 st 0 . 9 7 - 0 . 9 9 m m ( 0 . 0 3 8 - 0 . 03 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
Before i n sta l l i n g p i ston r i n g s , m e a s u re the f r e e e n d g a p of
each ring with a ve r n i e r c a l i p e rs .
N ext, fit the r i n g i n the 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 has a n excess e n d g a p , re p l ace t h e r i n g .
Piston ring free end g a p
Service limit 1 st : 6 . 2 m m (0 . 24 i n )
2nd : 7 . 3 m m (0 . 29 i n )
L T·F4WDXM ('91 - M O D E L) 1 5-20