Piston Rings
- Check clearance between piston rings and ring grooves. If the limit is exceeded, replace piston rings or piston, or both.
Standard value:
Number 1 ring: 0.03 - 0.07 mm (0.001 - 0.003 inch)
Number 2 ring: 0.03 - 0.07 mm (0.001 - 0.003 inch)
Limit: 0.1 mm (0.004 inch)
- Put piston rings into the cylinder bore, press them against the piston top face, and push them in. After achieving squareness, measure the end gap with a thickness gauge. If the end gap is excessive, replace piston rings.
Standard value:
Number 1 ring: 0.15 - 0.28 mm (0.006 - 0.011 inch)
Number 2 ring: 0.25 - 0.40 mm (0.010 - 0.016 inch)
Oil ring: 0.10 - 0.35 mm (0.004 - 0.014 inch)
Limit:
Number 1 ring: 0.8 mm (0.03 inch)
Number 2 ring: 0.8 mm (0.03 inch)
Oil ring: 1.0 mm (0.04 inch)