Piston Ring, Engine

SIDE GROOVE CLEARANCE:

No. 1 Compression Ring:
Standard 0.03 - 0.07 mm (0.0012 - 0.0028 inch)
Wear Limit 0.1 mm (0.004 inch)

No. 2 Compression Ring:
Standard 0.02 - 0.06 mm (0.0008 - 0.0024 inch)
Wear Limit 0.1 mm (0.004 inch)

END GAP:

No. 1 Ring:
Standard 0.25 - 0.40 mm (0.0098 - 0.0157 inch)
Wear Limit 0.8 mm (0.031 inch)

No. 2 Ring:
Standard 0.40 - 0.55 mm (0.0157 - 0.0217 inch)
Wear Limit 0.8 mm (0.031 inch)

Oil Ring:
Standard 0.15 - 0.50 mm (0.0059 - 0.0197 inch)
Wear Limit 1.0 mm (0.039 inch)