Yes, you should start the engine. After you have completed any work associated with draining the coolant, you will either have a precise procedure for removing air from the cooling system or you will just run the engine to remove the air. If you don’t, as the engine heats up, the gasses (air) will expand at a faster pace than the liquid.
Check to see that your engine is turned off and completely cool, that your car is in Park or Neutral, and that your parking brake is engaged. Remove the hood and look under it for the engine coolant reserve. It is often white with a transparent sheen to it, and it is connected to the radiator via a hose or hoses.
How do I know when to add coolant to my car?
In most cases, the proper coolant level in the tank, and thus the proper operation of the cooling system, is determined when the engine is cold; if the coolant level in the expansion tank is at the ″cold″ level when the engine is cold, then you’re good to go; otherwise, you’ll need to add more coolant to the tank.Add coolant to a cold engine when the amount of coolant is below that indicated by the ″cold″ indication.
What happens if you don’t add coolant to your car?
In your role as a driver and car owner, one of the most crucial but simple jobs you can master is how to properly apply engine coolant to your vehicle. This is significant because a shortage of engine coolant might result in major damage to the engine. It’s straightforward since it’s really just a simple filling job, after all.
What happens if you open the coolant tank when engine is hot?
REMOVE THE HOOD (THE ENGINE SHOULD BE COLD) This should not be done when the engine is hot! It is possible that quick opening of the expansion tank will have a ″geyser″ effect in this case. It is possible that boiling hot coolant can wind up on your hands or torso, resulting in serious burns.