Operation CHARM: Car repair manuals for everyone.

Piston Ring, Engine

Piston Ring-to-Groove Clearance
First Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Second Compression Ring 0.031 - 0.074 mm (0.0012 - 0.0029 inch)
Oil Control Ring 0.051 - 0.203 mm (0.002 - 0.008 inch)

End Gap