Piston Ring, Engine
Piston diametercoded red 96.795-96.782 mm (3.81082-3.81031 inch)
coded blue 96.808-96.795 mm (3.81133-3.81082 inch)
coded yellow 96.821-96.808 mm (3.81184-3.81133 inch)
Piston-to-bore clearance (uncoated clearance) 0.018-0.044 mm (0.00071-0.00173 inch)
service piston selection
I.D. code of service
piston bore diameter piston required
red 96.826-96.813 mm (3.81204-3.811528 inch)
blue 96.839-96.826 mm (3.81255-3 81204 inch)
yellow 96.852-96.839 mm (3.81306-3.81255 inch)
Pin bore diameter 23.014-23.018 mm (0.90606-0.90622 inch)
Ring groove width
compression (top) 1.54-1.52 mm (0.0606-0.0598 inch)
compression (bottom) 1.54-1.52 mm (0.0606-0.0598 inch)
oil 3.05-3.03 mm (0.12001-0.11929 inch)
Piston pin
length 0.55-63.05 mm (2.5096-2.4823 inch)
diameter 23.000-23.003 mm (0.90551-0.90563 inch)
Pin to piston clearance 0.011-0.018 mm (0.00043-0.00071 inch)
Pin to rod clearance press fit 8 kilo newtons (1 800 lbs)
Piston rings
ring width
compression (top) 1.460-1.490 mm (0.05748-0.05866 inch)
compression (bottom) 1.460-1.490 mm (0.05748-0.05866 inch)
oil ring side seal-snug fit
service limit side clearance 0.015 mm MAX (0.0006 in MAX)
Ring gap
compression (top) (in gauge) 0.17-0.33 mm (0.00669-0.01299 inch)
compression (bottom) (in gauge) 0.3-0.55 mm (0.01181-0.02165 inch)
oil ring (steel rail)(in 0.15-0.65 mm gauge) (0.00591-0.02559 inch)
Side clearance
1st ring 0.030-0.080 mm (0.00118-0.00315 inch)
2nd ring 0.030-0.080 mm (0.00118-0.00315 inch)
Note: When replacing pistons, measure the cylinder bore. Install the service piston matched to the piston bore diameter above.