Make sure your engine is off and cool, the vehicle is in Park or Neutral, and the parking brake is set. Open the hood and locate the engine coolant reservoir. It is often a translucent white color, and has hose(s) connecting it to the radiator.
Can you put coolant in a car if the engine is hot?
But in typical situations, the engine should be cool (or warm at most) before adding coolant to the radiator. Never attempt to add coolant to the radiator if the engine temperature is hot, as there is a big chance pressurized water can escape from the reservoir when you unscrew the coolant cap.
How long should you wait before adding coolant to your car?
If you check the level of your coolant, then you have to wait for about three to five hours. You might think that it is a very long time, but you have to note that there is residual heat from the engine after turning the engine off, and it will be passed to the coolant. Should The Car Be Running When Adding Coolant?
What happens if you use the wrong coolant in your car?
Since engine coolant is chosen for its compatibility with materials used in a car’s engine, using the wrong type will damage the engine and internal cooling system components. For instance, engines with cast iron blocks will need a coolant with specific additives to minimize corrosion.
Do you run the engine when you drain the coolant?
Yes. You do it whenever you drain coolant out of the system unless otherwise stated by the manufacturer. On your model, you run the engine to get out the air bubbles from all of the various water galleys in your system.