Piston Ring, Engine

Piston Ring
Piston ring groove clearance
Standard
No. 1 0.030 to 0.080 mm (0.00181 to 0.00314 in.)
No. 2 0.020 to 0.060 mm (0.000787 to 0.00236 in.)
Piston ring end gap
Standard
No. 1 piston ring 0.300 to 0.400 mm (0.0118 to 0.0157 in.)
No. 2 piston ring 0.400 to 0.550 mm (0.0157 to 0.0217 in.)
Oil ring (Side rail) 0.130 to 0.380 mm (0.00511 to 0.0150 in.)
Maximum
No. 1 piston ring 1.10 mm (0.0433 in.)
No. 2 piston ring 1.30 mm (0.0512 in.)
Oil ring (Side rail) 0.90 mm (0.0354 in.)