Piston Ring, Engine

Ring Gap
Top Compression Ring 0.20 - 0.36 mm (0.0079 - 0.0142 inch)
Second Compression Ring 0.37 - 0.63 mm (0.0146 - 0.0249 inch)
Oil Control (Steel Rails) 0.25 - 0.76 mm (0.0099 - 0.30 inch)
Side Clearance
Top Compression Ring 0.051 - 0.094 mm (0.0020 - 0.0037 inch)
Second Compression Ring 0.040 - 0.080 mm (0.0016 - 0.0031 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 (0.057 - 0.058 inch)
Second Compression Ring 1.472 - 1.490 mm (0.057 - 0.058 inch)
Oil Ring (Steel Rails) 0.445 - 0.470 mm (0.017 - 0.018 inch)