I'm trying to find the leak that caused my A/C to stop working. I'm checking the o-rings for damage. There is a low side connection located near the driver's side shock tower. The connection is held together by a threaded rod with a nut on the exposed end on the threaded rod. Tried putting a socket wrench on the nut but only the nut unscrews. Has anyone found a way to open this a/c connector without damaging the exposed end of the threaded rod? I'd hope I wouldn't have to put a vise grip on the end of the threaded rod and destroy the exposed threads.