Piston Ring, Engine

Piston Ring Groove Clearance
No.1 0.02 to 0.07 mm (0.0008 to 0.0028 in.)
No.2 0.02 to 0.06 mm (0.0008 to 0.0024 in.)
Oil 0.07 to 0.15 mm (0.0028 to 0.0060 in.)

Piston Ring End Gap
Standard
No.1 0.30 to 0.40 mm (0.0118 to 0.0157 in.)
No.2 0.40 to 0.50 mm (0.0157 to 0.0197 in.)
Oil (Side rail) 0.10 to 0.40 mm (0.0039 to 0.0157 in.)
Maximum
No.1 1.0 mm (0.039 in.)
No.2 1.1 mm (0.043 in.)
Oil (Side rail) 1.0 mm (0.039 in.)