Regularly look at the radiator. Allow your car to operate for any bit after which transform it off and pop open the hood. If the car is running, will not open the radiator.
https://www.youtube.com/watch?v=1aPd8ZemaIo
http://vidmax.com/video/107894-LED-Outfitters-Are-You-Having-Car-Problems-Try-The-Following-Tips