Piston, Engine

Piston (a)
Diameter
Coded red (before coating) 96.795-96.782 mm (3.81082-3.81031 inch)
Coded blue (before coating) 96.808-96.795 mm (3.81133-3.81082 inch)
Coded yellow (before coating) 96.821-96.808 mm (3.81184-3.81133 inch)
Clearance-to-cylinder bore (uncoated clearance) 0.018-0.044 mm (0.0007-0.0017 inch)
Ring end gap
Compression (top, in gauge) 0.17-0.33 mm (0.0067-0.0130 inch)
Compression (bottom, in gauge) 0.3-0.55 mm (0.0118-0.0217 inch)
Oil ring (steel rail, in gauge) 0.15-0.65 mm (0.0059-0.0256 inch)
Ring groove width
Compression (top) 1.535-1.52 mm (0.0604-0.0598 inch)
Compression (bottom) 1.54-1.52 mm (0.0606-0.0598 inch)
Oil 3.05-3.03 mm (0.1200-0.1193 inch)
Ring width
Compression (top) 1.47-1.49 mm (0.0578-0.0587 inch)
Compression (bottom) 1.47-1.49 mm (0.0578-0.0587 inch)
Oil side seal - snug fit ring
Ring-to-groove clearance
1st ring 0.030-0.065 mm (0.0012-0.0026 inch)
2nd ring 0.030-0.070 mm (0.0012-0.0028 inch)
Piston Pin
Bore diameter 23.012-23.012 mm (0.9060-0.9061 inch)
Pin diameter 23.000-23.003 mm (0.9055-0.9056 inch)
Pin length 63.55-63.05 mm (2.5096-2.4823 inch)
Pin-to-piston fit 0.009-0.017 mm (0.0004-0.0007 inch)
(a) When installing new pistons, measure the cylinder bore and install the service piston matched to the piston bore diameter above.