Piston: Specifications

Piston
Type 1 Piece
Material Aluminum
Skirt Antiscuff/Barrel Shaped
Head Ni-resist Insert for Top Ring Groove
Coolant Oil Cooling Channel
Piston Pin Type Hollow
Material Steel
Diameter 34.5 mm (1.36 inch)
Retention Method Snap Ring
Piston Rings Number 3
Top Compression Ring Type Keystone Ring
Top Compression Ring Material Steel
2nd Compression Ring Type Positive Twist/Inner Cut
2nd Compression Ring Material Cast Iron
Oil Control Ring Type Bevel-Edged Oil Control Ring
Oil Control Ring Material Steel
Piston to Small End Clearance - Production Value 5 mm (0.1969 inch)
Piston Outside Diameter - At 22 mm from Piston Bottom - Production Value 102.948-102.960 mm (4.0531-4.0535 inch)
Bore Inside Diameter for Piston Pin - Production Value 34.504-34.512 mm (1.3584-1.3587 inch)
Piston Cooling Jet Valve Opening Pressure 196 kPa (29 psi)
Piston Rings
Compression Ring Gap - Service Limit 1.37 mm (0.0539 inch)
Compression Ring Gap - Production Value 0.3-0.45 mm (0.0118-0.0177 inch)
2nd Ring Gap - Service Limit 1.35 mm (0.0531 inch)
2nd Ring Gap - Production Value 0.50-0.65 mm (0.0197-0.0256 inch)
Oil Ring Gap - Service Limit 1.20 mm (0.0472 inch)
Oil Ring Gap - Production Value 0.15-0.35 mm (0.0059-0.0138 inch)
Piston Ring Groove Clearance
Compression Ring - Service Limit 0.26 mm (0.0102 inch)
Compression Ring - Production Value 0.08-0.17 mm (0.0030-0.0067 inch)
2nd Ring - Service Limit 0.10 mm (0.0039 inch)
2nd Ring - Production Value 0.01-0.03 mm (0.0004-0.0012 inch)
Oil Ring - Service Limit 0.12 mm (0.0047 inch)
Oil Ring - Production Value 0.01-0.03 mm (0.0004-0.0012 inch)