LONCIN G250F - Page 53

Section 4 Disassembly and service
Piston- to – cylinder clearance
Standard
Service limit
0.015-0.050 mm
0.120 mm
Piston ring side clearance
Standard
Service limit
Top/Second/ Oil
0.015-0.045 mm
0.15 mm
Piston ring width
Standard
Service limit
Top
1.0mm
0.87 mm
Second
1.2mm
1.07 mm
Piston ring end gap
Parts
Standard
Service limit
Top
0.2-0.4 mm
1.0 mm
second
0.3-0.5 mm
1.0 mm
Oil
0.2-0.7 mm
1.0 mm
Before measuring end gap, use the piston top to position
the ring so it will not be cocked in the cylinder bore.
Piston pin hole ID
Model
Standard
Service limit
G250F(D)S
18.002mm
18.048 mm
Piston pin to Piston hole gap
Standard
Service limit
0.002-0.014 mm
0.06 mm
4-28