Piston Ring, Engine

PISTON RINGS
Ring Gap
Top Compression Ring 0.20 - 0.36 mm (0.008 - 0.014 inch)
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)
PISTON RING SIDE CLEARANCE
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)
PISTON RING WIDTH
Top Compression Ring 1.17 - 1.19 mm (0.0461 - 0.0469 inch)
2nd Compression Ring (Micro Napier) 1.47 - 1.49 mm (0.058 - 0.059 inch)
Oil Control (Steel Rails) 0.445 - 0.470 mm (0.0176 - 0.0186 inch)