Hi and thanks for using 2CarPros.com.
Based on your description, I need you to check for a head gasket issue. If you are getting air bubbles into the cooling system, there is a chance the gasket has failed.
Take a look through this link and try the tests listed.
https://www.2carpros.com/articles/head-gasket-blown-test
Let me know what you find or if you have other questions.
Take care,
Joe
Oct 26, 2018 at 6:50 PM