No, it does not make the car run better. Dex-cool is a type of engine coolant most commonly used in GM products.
This is normal. These fans are run by a thermostat that keeps the engine cool. It will run for a short time even after the car is shut off.
No , when the engine is cool
It doesn't, it helps cool the engine by running coolant through it and letting it air cool. The better the radiator = the better the cooling, thus making the engine more efficient.
a car, an engine
To cool the engine of the car.
It will run but not for very long. No oil pump means no oil will be moving throughout the engine to lubricate and cool the engine. The engine will overheat, bearings & rings will wear and in a short amount of time the engine will lock up and self destruct.
the radiator could still be warm or if the car is cool and it runs you need to replace the fan relay switch.
The main cause would be the thermostat stuck open, not forcing the engine to operate at the desired temp.
It has over 10,000 parts!
The heater has a little radiator in it and it may be enough to cool a engine that is running hot
because when car is sitting still and at idle you do not have "air flow" coming into radiator to help cool it as you do when you are driving. So fan compensates for this higher engine - antifreeze temperature to try and cool it off it has to work harder.