Piston Ring, Engine

Piston Ring Groove Clearance
No. 1 Ring 0.02 to 0.04 mm (0.0008 to 0.0016 inch)
No. 2 Ring 0.02 to 0.06 mm (0.0008 to 0.0024 inch)
Oil Ring 0.02 to 0.06 mm (0.0008 to 0.0024 inch)





Piston Ring End Gap
Standard
No. 1 Ring 0.20 to 0.30 mm (0.0079 to 0.0118 inch)
No. 2 Ring 0.30 to 0.45 mm (0.0118 to 0.0177 inch)
Oil Ring 0.10 to 0.40 mm (0.0039 to 0.0158 inch)
Maximum
No. 1 Ring 0.61 mm (0.0240 inch)
No. 2 Ring 1.20 mm (0.0472 inch)
Oil Ring 1.15 mm (0.0453 inch)