jasazle96 9/16/2012If it dented the fins on the radiator it wont cool correctly
HouseCallAuto 9/16/2012See if the cooling fan is working or not. let the car idle for as long as it takes. The fan should come on before the temperature climbs past normal if it is working. keep in mind that it could take 30 minutes for the temperature to climb. If the temp goes into the danger zone and the fan has not turned on to cool it down, then it is a logical suspicion that your impact with the curb has damaged the fan or fan blade has become stuck or the wiring to the fan was damaged. If the fan is your cause though, the car would likely NOT run hot when driving the car (when the car is moving) and the car would begin to run hot while parked and idling, like at a long traffic light.