I'd like to watch that episode...which was it? Back in the day, an old welder at MINSY told me a story of him welding a steel plate on the side of a 440 block that had been in a Calif HP, having crashed and had an actual hole in the block. He 'claimed' it never leaked! Being an old-time shipyard welder, you never know as some of those old-timers had tricks even weld engineers can't figure out...and that is a fact!