Close-up of an engine piston with heat-discolored dished crown o…

Close-up of a single engine piston standing on white paper on a kitchen counter, photographed from above at an angle. The dished crown is heat-discolored brown with scattered deposits, the ring lands and a fitted compression ring are visible, and the skirt below is clean bare aluminum.

AI caption June 2003 · Photo 104 of 2456