My car won't cool down. When it warms up it continues to get hot until I turn it off. The obvious reason would be that the thermostat is closed shut, but just a couple months ago I put a Stanton 180 degree t.stat and a 3 row radiator. My car has been perfect until yesterday when this happened. Is it possible for a thermostat to go out in such a short period of time? I was also wondering what the obvious signs of a bad water pump are. I dont hear an excess noises and theres no obvious leaks. Any ideas? Thanks.