Piston diameter

WARNING: This page is about a different car, the 2007 Saab 9-5 and 2006 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.

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

Courtesy of SAAB-SCANIA OF AMERICA, INC.