check to see if the water pump is working. Usually they make a whining or clattering noise when they go out, but not always. Feel your radiator hoses to see if the top and bottom hoses are close to the same temperature. If you have a radiator cap, remove it and start the car and watch for water flow. Watch the temp gage and listen for thermostat to engage, could be faulty. Even if new. Make sure fans engage properly, usually at 225 , and disengages around 210.
