Piston Ring, Engine

Ring Gap
Top Compression Ring 0.23 - 0.38 mm (0.0090 - 0.0149 inch)
Second Compression Ring 0.35 - 0.60 mm (0.0137 - 0.0236 inch)
Oil Control (Steel Rails) 0.15 - 0.66 mm (0.0059 - 0.0259 inch)
Side Clearance
Top Compression Ring 0.02 - 0.068 mm (0.0007 - 0.0026 inch)
Second Compression Ring 0.02 - 0.058 mm (0.0007 - 0.0022 inch)
Oil Ring (Steel Ring) 0.019 - 0.229 mm (0.0007 - 0.0091 inch)
Ring Width
Top Compression Ring 1.472 - 1.490 mm (0.0579 - 0.0586 inch)
Second Compression Ring 1.472 - 1.490 mm (0.0579 - 0.0586 inch)
Oil Ring (Steel Rails) 0.447 - 0.473 mm (0.0175 - 0.0186 inch)