Regularly look at your radiator. Allow your car to perform for any bit and after that turn it off and pop open the hood. Tend not to open the radiator in case the car is running.
https://www.youtube.com/watch?v=1aPd8ZemaIo
http://vidmax.com/video/108053-LED-Outfitters-Have-You-Been-Having-Car-Problems-Try-The-Following-Tips