Piston Ring, Engine

SPECIFICATION
Piston ring
Number of rings per piston 3
Compression ring 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
Specification 0.20 - 0.30 mm (0.0079 - 0.0118 inch)
Limit 0.8 mm (0.0315 inch)
No.2
Specification 0.45 - 0.60 mm (0.0177 - 0.0236 inch)
Limit 0.8 mm (0.0315 inch)
Oil ring side rail
Specification 0.2 - 0.7 mm (0.0079 - 0.0276 inch)
Limit 1.0 mm (0.0394 inch)
Ring side clearance
No.1
Specification 0.04 - 0.08 mm (0.0016 - 0.0031 inch)
Limit 0.1 mm (0.0039 inch)
No.2
Specification 0.02 - 0.06 mm (0.0008 - 0.0024 inch)
Limit 0.1 mm (0.0039 inch)
Ring for service 0.25mm (0.010 inch), 0.50 mm (0.020 inch) Oversize