Piston Ring, Engine

Piston ring
Ring closed gap
Top ring
Standard 0.20 - 0.35 mm (0.0079-0.0098 in)
Limit 0.15 mm (0.0059 in)
Second ring
Standard 0.030-0.070 mm (0.0012-0.0028 in)
Limit 0.15 mm (0.0059 in)
Oil ring
Standard 0.20 - 0.50 mm (0.0079 - 0.0197 in)
Limit 1.5 mm (0.059 in)
Ring groove gap
Top ring
Standard 0.040 - 0.080 mm (0.0016 - 0.0031 in)
Limit 0.15 mm (0.0059 in)
Second ring
Standard 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Limit 0.15 mm (0.0059 in)