I fixed the leak, i didnt seal it. I have a new thermostat, I've owned it for months because I originally thought that was why I was overheating until it turned out to be a simple loss of coolant because of the leak. The drain plug for the radiator had been stripped and I dont know how it happened, I didnt do it. Also, mysteriously my heat worked last night. I have had teh evaporator(would be heating duct for cars without a/c) unattached for a little bit, it's still in its place but its not flush with either the heater or the blower. Heat came out of the vents, however, when i put my hand between the heater and teh evaporator, it was cold. What does this mean?