Piston: Testing and Inspection

Piston Measurement (Part 1 Of 2):

Piston Measurement (Part 2 Of 2):

NOTE:
^ When performing repairs, the cylinder bores should be finished to the dimensions of the existing pistons in accordance with the table for matching the pistons; see "Measuring, boring and honing cylinder bores".
^ Piston play when the pistons are new is 0.02 - 0.04 mm. The measuring point is about 12 - 14 mm above the bottom edge of the piston at right angles to the piston pin.
^ It is not possible to conduct an exact measurement of used pistons as the piston skirt has "sunk" at the measuring point provided.
^ If pistons with standard size are replaced when performing repairs because of a noise problem, match up the pistons properly in accordance with the cylinder bore size.