How to Add Car Coolant?

[LeChristian]

Correct steps for adding car coolant are: 1. Open the drain valve of the radiator, wait until all the antifreeze inside is drained, then use a properly sized tube to insert into the radiator and flush it with clean water, ensuring the water flows through the entire cooling system; 2. After completing the above steps, close the drain outlet and start adding coolant into the radiator until it is full, but do not exceed the marked line; 3. Start the engine with the radiator cap open, keeping the engine idling for two to three minutes to expel some air from the radiator. If the coolant level starts to drop, continue adding coolant until it reaches the marked line.