Piston Ring: Specifications

Ring groove width
Compression (top) 1.230-1.245 mm (0.0484-0.0490 inch)
Compression (bottom) 1.530-1.545 mm (0.0602-0.0608 inch)
Oil ring 3.030-3.055 mm (0.1192-0.1203 inch)
Piston pin
Length 60.51-60.08 mm (2.382-2.365 inch)
Diameter 21.011-21.013 mm (0.0013 inch)
Pin-to-piston clearance -0.005 to +0.001 mm (0.0001-0.00003 inch)
Pin-to-rod clearance
Standard 0.004-0.020 mm (0.0001-0.0007 inch)
Service limit 0.035 mm (0.0013 inch)
Piston Ring-To-Groove Clearance
Compression (top) 0.040-0.075 mm (0.0015-0.0029 inch)
Compression (bottom) 0.040-0.085 mm (0.0015-0.0033 inch)
Oil ring Snug Fit
Piston ring gap g
Compression (top)-gauge diameter 0.100-0.250 mm (0.0039-0.0098 inch)
Compression (bottom)-gauge diameter 0.27-0.42 mm (0.0106-0.0165 inch)
Oil ring (steel rail)-gauge diameter 0.15-0.65 mm (0.0059-0.0255 inch)
Compression (top)-service limit 0.50 mm (0.0196 inch) max.
Compression (bottom)-service limit 0.65 mm (0.0255 inch) max.
Oil ring (steel rail)-service 1imit 0.90 mm (0.0354 inch) max.

g Specification 82.4 mm (3.2441 inch) diameter gauge.