How to Bleed the Cooling System

Reader Question


Hey Austin, I had just replaced the radiator in my car and was trying to fill up the radiator when I noticed I kept getting large air pockets that would burp up at me. How do you remove those air pockets and bleed the air out of the cooling system?

Tom T.


Hey there Tom,


Good question. There is sometimes a bleeder screw on or next to the thermostat housing which you can unscrew with the engine running cold and it will help to burp out that extra air that is trapped inside.

If you do not have a bleeder screw you can try what this guy is doing in this short video below.


Posted in: Over Heating

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Austin Davis, consumer car repair advocate. "Hi there! I love to help people solve their car repair problems and I hope my site was helpful to you today. Thank you for stopping by."