any update. I had expansion tank leak. I replaced it and now I have a mysterious leak. I also have to have the heat on 90 all the way up or the car overheats. I'am having to put fluid in about ever 15 mins just to get it back to the house. If i turn the Heater off it stops circulation becuase 1. The car heats up 2. the filler neck pisser stops pissing?? Any ideal anyone I see fluid but dont see the culprit??