Piston Ring, Engine

Piston Ring
Ring groove clearance
No. 1 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No. 2 0.03 to 0.07 mm (0.0012 to 0.0028 in.)
Oil 0.03 to 0.11 mm (0.0012 to 0.0043 in.)
Piston ring end gap
Standard No. 1 0.25 to 0.35 mm (0.0098 to 0.0138 in.)
Standard No. 2 0.35 to 0.50 mm (0.0138 to 0.0197 in.)
Standard Oil 0.15 to 0.40 mm (0.0059 to 0.157 in.)
Maximum No. 1 1.05 mm (0.0413 in.)
Maximum No. 2 1.20 mm (0.0472 in.)
Ring pin (cylinder block)
A 6 mm (0.236 in.)
B 7 mm (0.276 in.)
C 10 mm (0.394 in.)