Ok, here's the prob. I have a '77 cj5. I have a copper tube running from the engine to the oil pressure gage ( I forget the proper name, I'm not mechanically inclined.) The copper tube will snap from time to time right past where the nut tightens it into the engine. I can catch it before anything bad happens and can fix it just to have it break again later. Any suggestions on fixing this probelm for good?