So my white car keep leaking coolant from those damn plastic elbows and I have never had this problem before. I replaced them once a couple months ago and the leak seemed to go away for awhile and now it is back. It keeps filling the lower motor mount U shaped bracket full of coolant. I did lube the O ring with a light coating of oil so that they slid in really nice but maybe the O ring is not sealing because of some crud built up around the sealing areas. Any trick to get these things to seal up?