Piston Ring: Specifications

Piston
Ring groove width
No. 1 1.503 - 1.505 mm (0.0592 - 0.05925 inch)
No. 2 1.501 - 1.503 mm (0.0591 - 0.0592 inch)

Piston ring
Number of rings per piston 3
Compression ring type 2
Oil ring 1
Compression ring type
No. 1 Barrel type, steel
No. 2 Taper type, special cast iron
Oil ring type 3 - piece type
Ring end gap
No. 1 0.20 - 0.30 mm (0.0078 - 0.0118 inch)
No. 2 0.40 - 0.55 mm (0.0157 - 0.0216 inch)
Oil ring side rail 0.2 - 0.7 mm (0.0079 - 0.0276 inch)
Ring side clearance
No. 1 0.04 - 0.08 mm (0.0016 - 0.0031 inch)
No. 2 0.02 - 0.06 mm (0.0008 - 0.0024 inch)
Ring for service 0.25mm (0.010 inch), 0.50 mm (0.020 inch)