For a different point of view, a friend who ran the paint/body shop for a large Chevy dealership told me in the mid 60s he never welded on the washers that had separated when repairing a worn hinge. He said his observation had been the ones that break loose are mostly the bottom ones and he figured it was because once they started running dry from lack of lubrication they'd seize the washer and tear it off when the door was open/closed (resistance caused by rust). As I said, another point of view.
