How do you put coolant in while the car is running?
How do you put coolant in while the car is running? Yes, but in most (if not all) newer cars, you only need to add coolant to the remote expansion tank. This is to prevent you from having to remove the radiator cap. If the engine is cool, or at least not hot, you can remove the radiator cap and add fluid directly to the radiator, even with the engine running. Where do you pour the coolant? Open the hood and locate the engine coolant reservoir. It is often a translucent white color, and has hose(s) connecting it to the...