Technician A says if the plated surface of a steel piston is worn, pitted, scored, or corroded, it can be lightly filed with a mill file then polished with emery cloth. Technician B says if there are any cracks, chips, or gouges in a phenolic piston, it must be replaced. Who is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because phenolic pistons, which are made from a type of plastic, cannot be repaired if they have cracks, chips, or gouges and must be replaced. Technician A's suggestion to file and polish a steel piston is not a recommended practice as it can alter the dimensions and integrity of the piston.

Technician a Says If the Plated Surface of a Steel