I have a small watering hole in my passenger football. n00b question you may think. However i have searched. It doesnt smell like coolant. The heater matrix has already been bypassed by previous owner with a piece of copper pipe and jubille/spring clips. The bung in the floor pan is in place. However my coolant level is dropping. Lost my expansion tank since saturday I think they must be two separate issues. The door seal seems fine. It is the original screen. Any help would be so welcome. As you can imagine today was an interesting job of de-icing the inside of my car There