Piston, Engine

Piston diameter-coated, grade 1 88.990-89.010 mm (3.5035-3.5043 inch)
Piston diameter-coated, grade 2 88.998-89.022 mm (3.5039-3.5048 inch)
Piston diameter-coated, grade 3 89.010-89.030 mm (3.5043-3.5051 inch)
Piston diameter-uncoated, grade 1 88.970-88.980 mm (3.50275-3.50314 inch)
Piston diameter-uncoated, grade 2 88.978-88.992 mm (3.50306-3.50362 inch)
Piston diameter-uncoated, grade 3 89.010-89.030 mm (3.50432-3.50511 inch)
Piston-to-cylinder bore clearance 0.012 to 0.022 mm (0.0005-0.0009 inch)
Piston ring end gap-compression (top, gauge diameter) c 0.100-0.250 mm (0.0039-0.0098 inch)
Piston ring end gap-compression (bottom, gauge diameter) 0.27-0.42 mm (0.0106-0.0165 inch)
Piston ring end gap-oil ring (steel rail, gauge diameter) 0.15-0.65 mm (0.0059-0.0255 inch)
Piston ring end gap-compression (top, service limit) 0.50 mm max (0.0196 inch)
Piston ring end gap-compression (bottom, service limit) 0.65 mm max (0.0255 inch)
Piston ring end gap-oil ring (steel rail, service limit) 0.90 mm max (0.0354 inch)
Piston ring groove width-compression (top) 1.230-1.245 mm (0.0484-0.0490 inch)
Piston ring groove width-compression (bottom) 1.530-1.545 mm (0.0602-0.0608 inch)
Piston ring groove width-oil ring 3.030-3.055 mm (0.1192-0.1203 inch)
Piston pin bore diameter 21.008-21.012 mm (0.8270-0.8272 inch)
Piston pin diameter 21.011-21.013 mm (0.8271-0.8273 inch)
Piston pin length 60.51-60.08 mm (2.382-2.365 inch)
Piston pin-to-piston fit 0.002 to 0.009 mm (0.00007-0.00003 inch)

c Specification 82.4 mm (3.2441 inch) diameter gauge.