G120F/G160F/G200F Part IV Disassembly and maintenance
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3) Piston ring side clearance
When inspecting put rings in the corresponding
piston grooves and they should be able to rotate
freely without looseness or stickiness. Then put a
feeler gauge between the ring and groove’s upper
or lower surface to measure.
Standard Service limit
0.015-0.045mm 0.15mm
4) Piston ring width
Standard Service limit
Top /second
1.5mm 1.37 mm
5) Piston ring end gap
Standard Service limit
Top /second
0.02-0.04mm 1.0mm
Before measuring piston ring end gap, correctly
install the rings onto the piston. Then put the piston
into the cylinder. As oil ring is used together with top
ring and second rings, so if any these rings should be
they should be replaced together.
6) Piston pin O.D.
Standard Service limit
G120
13.0mm 12.954 mm
G160 200
18.0mm 17.954 mm
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