Piston Ring, Engine

Piston Ring End Gap - First Compression Ring 0.2 - 0.4 mm (0.0079 - 0.0157 inch)
Piston Ring End Gap - Second Compression Ring 0.36 - 0.51 mm (0.0142 - 0.0201 inch)
Piston Ring End Gap - Oil Control Ring 0.250 - 0.760 mm (0.0098 - 0.0299 inch)
Piston Ring to Groove Clearance - First Compression Ring 0.043 - 0.093 mm (0.0017 - 0.0037 inch)
Piston Ring to Groove Clearance - Second Compression Ring 0.053 - 0.093 mm (0.0021 - 0.0037 inch)
Piston Ring to Groove Clearance - Oil Control Ring 0.059 - 0.215 mm (0.0023 - 0.0085 inch)