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Piston diameter

Piston diameter is measured at right angles to the gudgeon pin holes, 11 mm from the bottom of the piston.

PISTON DIAMETER

Classification, piston/cylinder Fits cylinder bore
A/B piston fits both A and B cylinder bores mm 90.000 - 90.020
B piston mm 90.007 - 90.020
Permitted piston clearance mm 0.025 - 0.056
Fig 1: Identifying Piston, Ring And Connecting Rod
G05034678Courtesy of SAAB-SCANIA OF AMERICA, INC.