Piston Ring, Engine

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.
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.