Piston Ring, Engine

Piston ring groove clearance
No. 1 0.020 to 0.070 mm (0.0008 to 0.0028 in.)
No. 2 0.020 to 0.060 mm (0.0008 to 0.0024 in.)
Oil 0.020 to 0.070 mm (0.0008 to 0.0028 in.)

Piston ring end gap
Standard
No. 1 0.23 to 0.33 mm (0.0091 to 0.0130 in.)
No. 2 0.35 to 0.45 mm (0.0138 to 0.0177 in.)
Oil (Side rail) 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Maximum
No. 1 0.40 mm (0.0157 in.)
No. 2 0.50 mm (0.0197 in.)
Oil (Side rail) 0.45 mm (0.0177 in.)