Piston Ring, Engine

PISTON RING

Ring closed gap mm (in)
Top ring
Standard 0.20 - 0.35 mm (0.0079 - 0.0138 in.)
Limit 1.0 mm (0.039 in.)

Second ring
Standard 0.37 - 0.52 mm (0.0144 - 0.0203 in.)
Limit 1.0 mm (0.039 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.)