Piston Ring, Engine

Ring Gap Clearance
Top Compression Ring 0.229 to 0.610 mm (0.0090 to 0.0240 inch)
2nd Compression Ring 0.483 to 0.965 mm (0.0190 to 0.0380 inch)
Oil Control Steel Rails 0.254 to 1.500 mm (0.010 to 0.060 inch)
Ring Side Clearance
Compression Rings 0.042 to 0.084 mm (0.0017 to 0.0033 inch)
Oil Control Rings 0.06 to 0.21 mm (0.0024 to 0.0083 inch)