Piston Ring, Engine

Piston Ring Gap And Groove Clearance

Ring Gap
Top Compression Ring 0.20 - 0.36 mm (0.0079 - 0.0142 in.)
Second Compression Ring 0.37 - 0.63 mm (0.0146 - 0.0249 in.)
Oil Control (Steel Rails) 0.25 - 0.76 mm (0.0099 - 0.30 in.)

Side Clearance
Top Compression Ring 0.051 - 0.094 mm (0.0020 - 0.0037 in.)
Second Compression Ring 0.040 - 0.080 mm (0.0016 - 0.0031 in.)
Oil Ring (Steel Ring) 0.019 - 0.229 mm (0.0007 - 0.0091 in.)