Piston Pin Clearance; Piston Rings; Piston Ring End Gap - Suzuki Wagon R Plus RB310 Service Manual

Piston pin clearance

Check piston pin clearance in small end and piston. Replace con-
necting rod and/or piston if its small end is badly worn or dam-
aged or if measured clearance exceeds limit.
Piston pin clearance in connecting rod small end
Standard: 0.003 – 0.014 mm (0.00012 – 0.00055 in.)
Limit: 0.05 mm (0.0020 in.)
Piston pin clearance in piston
Standard: 0.006 – 0.017 mm (0.00024 – 0.00066 in.)
Limit: 0.05 mm (0.0020 in.)
Small-end bore
20.003 – 20.011 mm (0.7876 – 0.7878 in.)
Piston pin dia.
19.997 – 20.000 mm (0.7873 – 0.7874 in.)
Piston bore
20.006 – 20.014 mm (0.7877 – 0.7879 in.)

Piston rings

Piston ring end gap

To measure end gap, insert piston ring (1) into cylinder bore and
then measure the gap by using thickness gauge (2).
If measured gap exceeds limit, replace ring.
NOTE:
Decarbonize and clean top of cylinder bore before insert-
ing piston ring.
Piston ring end gap
Item Standard
0.20 – 0.35 mm
Top ring
(0.0079 – 0.0137 in.)
0.30 – 0.45 mm
2nd ring
(0.0119 – 0.0177 in.)
0.20 – 0.70 mm
Oil ring
(0.0079 – 0.0275 in.)
"a": 120 mm (4.72 in.)
ENGINE MECHANICAL (M13 ENGINE) 6A2-73
Limit
0.7 mm
(0.0276 in.)
1.0 mm
(0.0394 in.)
1.2 mm
(0.0472 in.)