if you do this i would advise putting a washer in place of the thermostat to restrict waterflow this allows the water more time to cool in the radiator if not the water will flow so fast it will not cool and you will have the same problem. cutting a pop can bottom off and making a 1/2 inch whole in the center works good. not that i would know!!!!!!!!!!!!!!!! lol by the way you can make different size wholes in the washer to accomediate your desired tempature.....