Piston, Engine
PistonPiston diameter
Grade 1 90.191-90.206 mm (3.5508-3.5514 in)
Grade 2 90.203-90.220 mm (3.5513-3.5519 in)
Grade 3 90.217-90.232 mm (3.5518-3.5524 in)
Piston-to-cylinder bore clearance @ 43 mm from top(a) -0.005 to +0.025 mm (-0.0002 to +0.0010 in)
Piston ring end gap (top) 0.15-0.30 mm (0.0059-0.0118 in)
Piston ring end gap (intermediate) 0.15-0.30 mm (0.0059-0.0118 in)
Piston ring end gap (oil control) 0.15-0.30 mm (0.0059-0.0118 in)
Ring groove width (top) 1.520-1.540 mm (0.0598-0.0606 in)
Ring groove width (intermediate) 1.520-1.540 mm (0.0598-0.0606 in)
Ring groove width (oil control) 3.03-3.055 mm (0.1193-0.1203 in)
Piston ring width (top) 1.5 mm (0.05 in)
Piston ring width (intermediate) 1.5 mm (0.05 in)
Piston ring-to-groove clearance (top) 0.020-0.060 mm (0.0008-0.0024 in)
Piston ring-to-groove clearance (intermediate) 0.020-0.060 mm (0.0008-0.0023 in)
Piston ring-to-groove clearance (oil control) 0.030-0.070 mm (0.0012-0.0028 in)
Piston pin bore diameter 22.0065-22.0110 mm (0.8664-0.8666 in)
Piston pin diameter 21.995-21.997 mm (0.8659-0.8660 in)
Piston pin length 61.870-62.120 mm (2.4358-2.4456 in)
Piston pin-to-piston fit 0.0095-0.016 mm (0.0004-0.0006 in)
Piston-to-connecting rod clearance 6.58-7.58 mm (0.259-0.298 in)
(a) New pistons have a coating that may cause the piston-to-bore clearance to read negative, indicating the piston is slightly larger than the bore. This coating will wear off and should not be a cause of concern.