Question about 2003 Pontiac Sunfire
Who ever told you that turning on the heat in yor car actually makes the car run hotter is STUPID! the heater for the inside of the vehicle runs off a little fan and radiator inside of your car, which uses the exact same fluid that runs through the entire engine. It is not on a seperate circuit from the rest of the car. Turning on the fan interior heat actually makes the engine coolant get colder because it has some place to disapate, instead of just sitting there and getting hotter....
Now to the engine fan. Your fan there runs on electricity and turns on when your car hits a certain temperature, and is controlled by a little electric sensor that is placed on the radiator and/or cylinder head. The operation of the fan should only be sporadic on days where the temperature outside is cool, and you are driving at normal speeds and not rat bagging your car. On hot days, sitting in slow moving (stop and More Stopping, traffic jams) then your fan will come on and stay on longer, because there is no movement of air across the fins in your radiator, which cause the coolant inside to disapate the heat it is carrying away from the engine.... Turning on the heat inside of your car will actually help prevent your car from over heating (if it already does)... One the car over heats, do NOT OPEN the radiator vent cap, because the radiator is under pressure from the hot coolant inside. You will wind up spilling every single drop of anti freeze onto the side of the road, if ytou open the rad while it is hot. Remember this, if the radiator is too hot to touch, then it is too hot to open the cap. be patient and wait, you will save a ton of grief by being patient.
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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