Piston Ring: Specifications

Ring Groove Width
Compression (Top) 1.230-1.250 mm (0.484-0.0492 inch)
Compression (Bottom) 1.520-1.540 mm (0.05984-0.06062 inch)
Oil Ring 3.030-3.055mm

Oil Ring 1.15 mm (0.04528 inch) MAX
Side Clearance .075-.1000 mm (0.0030-0.0040 inch)
Compression (Top) 0.0090-0.0235 mm (0.000354-0.000925 inch)
Compression (Bottom) 0.030-0.080 mm (0.00118-0.00315 inch)
Oil Ring Snug Fit

Ring Gap (k)
Compression (Top) 0.150-0.300 mm (0.006-0.0018 inch)
Compression (Bottom) 0.300-0.550 mm (0.0018-0.0022 inch)
Oil Ring (Steel Rail) 0.15-0.66 mm (0.00591-0.02598 inch)

k Specification in 90.200 mm diameter gauge.

Piston Rings
Ring Gap
Compression (Top) 1.00 mm (0.03937 inch) MAX
Compression (Bottom) 1.00 mm (0.03937 inch) MAX
Service Limit 1.15 mm (0.04528 inch) MAX