Thanks Larry. I think he left it running until it cooled off just to prove his point. It doesn't leak, but the charge never seems to last enough to cool off right away. I got a second opinion on whether it leaks and it came through fine. Even when I had it evacuated and charged once before, it was cool for a while and then died out. It's an 85 380SE that works fine otherwise. I know these babies were never meat locker cold to begin with, but I'm dying in our current heatwave.