Piston: Specifications

Cylinder Bore and Piston
Cylinder Bore Diameter
- Surface finish (RMS) 0.2-0.6 Microns
- Out-of-round limit 0.20 mm (0.007874 inch)
- Out-of-round service limit 0.70 mm (0.027559 inch)
- Taper service limit Piston 0.70 mm (0.027559 inch)
- Diameter 0.028 mm (0.0010 inch)
- Coded Red 1 90.185-90.205 mm (3.55-3.551 inch)
- Coded Blue 2 90.195-90.215 mm (3.55-3.551 inch)
- Coded Yellow 3 90.205-90.225 mm (3.551-3.552 inch)
Coated Piston-to-Bore Clearance -0.005-0.025 mm (-0.002/+0.001 inch)
Pin Bore Diameters 21.008-22.014 mm (0.866-0.867 inch)
Ring Groove Width
- Compression (top) 1.530-1.550 mm (0.06-.061 inch)
- Compression (bottom) 1.520-1.540 mm (0.06-0.061 inch)
- Oil ring 3.030-3.050 mm (0.12-0.12 inch)
Piston Pin
- Length 61.601-62.030 mm (2.42523-2.44212 inch)
- Diameter 22.0010-22.0030 mm (0.87-0.871 inch)
Pin to Piston Fit -0.005/+0.0135 mm (-0.0002/+0.0005 inch)
Pin to Rod Clearance
- Standard 0.009-0.0235 mm (0.0004-0.00092 inch)
- Service limit 0.035 mm (0.001378 inch)
Piston Ring
- Compression (top) 0.050-0.090 mm (0.002-0.004 inch)
- Compression (bottom) 0.030-0.080 mm (0.00118-0.00315 inch)
- Oil ring Ring Gap Snug fit
- Compression (top) 0.130-0.280 mm (0.005-0.011 inch)
- Compression (bottom) 0.300-0.550 mm (0.0018-0.0022 inch)
- Oil ring (steel rail) 0.150-0.650 mm (0.006-0.0256 inch)
Piston to Deck 0.035-0.565 mm (0.001-0.022 inch)
Piston Ring Thickness
- Compression (top) 1.480-1.500 mm (0.058-0.059 inch)
- Compression (bottom) 1.470-1.490 mm (0.0587-0.0586 inch)
- Oil ring N/A