Piston Ring, Engine

PISTON RINGS
Ring Gap-Top Compression Ring 0.20 - 0.36 mm (0.008 - 0.014 inch)
Ring Gap-2nd Compression Ring (Micro-Napier 0.20 - 0.40 mm (0.0078 - 0.0157 inch)
Ring Gap-Oil Control (Steel Rails) 0.25 - 0.76 mm (0.010 - 0.030 inch)
Metric Standard Top and Second Compression Ring 0.04 - 0.08 mm (0.0016 - 0.0031 inch)
Oil Ring (Steel Rails 0.038 - 0.184 mm (0.0015 - 0.0073 inch)