Piston Rings
To measure end gap, insert piston ring (1) into cylinder bore and
then measure the gap by using thickness gauge (2).
If measured gap is out of specification, replace ring.
NOTE:
Decarbon and clean top of cylinder bore before inserting pis-
ton ring.
“a”: 120 mm (4.72 in.)
Connecting Rod
Big-end side clearance:
Check big-end of connecting rod for side clearance, with rod
fitted and connected to its crank pin in the normal manner. If
measured clearance is found to exceed its limit, replace con-
necting rod.
Connecting rod alignment:
Mount connecting rod on aligner to check it for bow and twist
and, if limit is exceeded, replace it.
Limit on bow : 0.05 mm (0.0020 in.)
Limit on twist : 0.10 mm (0.0039 in.)
6A1-54
ENGINE MECHANICAL
SH410
Item
Standard
Limit
Piston
Top ring
0.15 – 0.30 mm
(0.0059 – 0.0118 in.)
0.7 mm
(0.0275 in.)
Piston
ring end
gap
2nd ring
0.2 – 0.35 mm
(0.0079 – 0.0137 in.)
0.7 mm
(0.0275 in.)
ga
Oil ring
0.2 – 0.7 mm
(0.0079 – 0.0275 in.)
1.7 mm
(0.0669 in.)
Item
Standard
Limit
Big-end side
clearance
0.10 – 0.20 mm
(0.0039 – 0.0078 in.)
0.35 mm
(0.0137 in.)
