LONCIN LC2P73F - Piston Ring and Clearance Measurements

Chapter V Disassembly & Repair
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Clearance between piston and cylinder
The difference between the maximum diameter of cylinder and
the diameter of the piston skirt is the clearance between piston and cylinder.
Standard
Maintenance Limit
0.025~0.045 mm 0.255 mm
Clearance to the side of piston ring
Standard
Maintenance Limit
Top/
Second
0.02-0.06 mm 0.11 mm
Width of piston ring
Standard
Maintenance Limit
Top 1.17~1.19mm 1.1 mm
Second 1.17~1.19mm 1.1 mm
Oil ring 1.87~1.97mm 1.8 mm
Clearance to the end of piston ring
Before measuring the clearance to the end of piston ring, locate the piston ring with the top of the piston to make
it not erect in the inner hole of the cylinder.
Inner diameter of piston pin hole
Standard
Maintenance Limit
17.002~17.008 mm 17.12 mm
Clearance between piston pin hole and piston pin
Standard
Maintenance Limit
0.004~0.016 mm
0.029 mm
Standard Maintenance Limit
Top/
Second
0.2~0.4 mm 0.45 mm