Hello, I have a '98 Ford Taurus that I bought about 2 weeks ago. I needed something just to get me back and forth to work and it was dirt cheap, but now I think I know why. The guy I bought it from said that it has no heat in the winter. He had it flushed out and said after that it would blow heat, but eventually got cold again. He told me his mechanic said it needed a new radiator. It overheated on me one day when I had the AC on, so I turned off the AC and it was fine. I changed the overflow bottle, bought a new one and it seemed fine, but now, anytime I turn on the AC and drive for a while, it starts getting hot. When I changed the overflow, the coolant that was in it was the color of mud. I know this is because of rust, but from where? I noticed I was low on coolant also, but can't detect any leaks. I have also noticed a smell of anti freeze at times.
What kind of test can I run on this car to figure out what the problem is? Or does anyone have any ideas?
Thanks for any answers or advice.