Jesper de Jong's link about machine suicide wrote:… and another pours sand into its gearbox until its gearbox wears out.]
I was told a story about Colin Chapman yesterday; he wanted to change the final drive ratio of a car's differential and did not have the right gears, so he too some gears which almost fitted and filled the diff with grinding paste. After a few miles' driving, he too the diff apart, cleaned it, and proceeded to win a hill‑climb in that very car.