Yes, it can keep your car cooler if you crack your windows.
One way to keep your car cool without air conditioning is to place a fan in the backseat. Another way is to place a large cooler in the car.
Yes, turning on the AC can cool the engine.
There are a few ways to make an air conditioner for a car. One way is to build an air conditioner from scratch. Another way is to buy an air conditioner that has a portable unit.
No, you should close the windows before turning on the AC.
There is no definitive answer to this question as it depends on the specific type of AC unit and the severity of the overheating problem. However, turning off AC may help to prevent the car from over heating, depending on the severity of the problem.