Piston Ring, Engine

Ring Gap
Top Compression Ring 0.37 - 0.63 mm (0.0146 - 0.0249 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
Standard
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.)
Maximum
Top Compression Ring 0.11 mm (0.004 in.)
Second Compression Ring 0.10 mm (0.004 in.)
Oil Control (Steel Rails) 0.25 mm (0.010 in.)
Ring Width
Top Compression Ring 1.472 - 1.490 mm (0.057 - 0.058 in.)
Second Compression Ring 1.472 - 1.490 mm (0.057 - 0.058 in.)
Oil Ring (Steel Rails) 0.445 - 0.470 mm (0.017 - 0.018 in.)