I have a 2006 Mustang Convertible V6 with strange fluid leak. It is radiator fluid but everything checks out. I fill up the overflow tank and it drains out in a couple of days. I thought it was where the thermostat was but i cant see any water coming from it. I just cant see where it is coming from. The hoses are perfect to. Now whats strange is after the overflow tank is drained the leak stops. The car does not overheat either. I bought a thernostat but no use putting it in if it doesn't need it. I had some buildup around the thermostat housing but after i cleaned it i can still see no leak. Where do this year usually leak from. Thank You