hey guys, i've had my 2nd hand 93 csi limited corolla for two months. but i'v always had a major problem with the radiator which i dont know wht the matter. thing is the cars basically over heats even with the radiator fan on! the only way to cool it down is to turn on the heater in the car max. i've changed the thermostat and the radiator cap, but nth changes. the car the radiator has a small dent but otherwise nth seems to be leaking or broken...am considering changing the radiator but just not quite sure if it's the radiator's prob. any suggestions as to whats happening guys???