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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 is out of specification, replace ring.
NOTE:
Decarbonize and clean top of cylinder bore before inserting piston ring.
Piston ring end gap
Top ring: 0.20 – 0.35 mm (0.0079 – 0.0137 in.)
2nd ring: 0.70 – 0.90 mm (0.0276 – 0.0354 in.)
Oil ring: 0.25 – 0.50 mm (0.0099 – 0.0196 in.)
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Piston ring thickness
Measure piston ring thickness. If measured thickness is out of specification, replace piston ring.
Piston ring thickness
Top ring: 1.97 – 1.99 mm (0.0776 – 0.0783 in.)
2nd ring: 1.97 – 1.99 mm (0.0776 – 0.0783 in.)
Oil ring: 2.47 – 2.49 mm (0.0973 – 0.0980 in.)
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Ring groove clearance
Before checking, piston grooves must be clean, dry and free of carbon.
Fit new piston ring (1) into piston groove, and measure clearance between ring and ring land by using thickness gauge (2).
If clearance is out of specification, replace piston.
Ring groove clearance
Top ring: 0.10 – 0.12 mm (0.0040 – 0.0047 in.)
2nd ring: 0.08 – 0.10 mm (0.0032 – 0.0039 in.)
Oil ring: 0.03 – 0.05 mm (0.0012 – 1.2700 in.)