Radiator coolant overflowing

Hi and thanks for using 2carpros. Com

Like you, my first suspect is the head gasket. However, if you had it checked, then it has to be the result of the engine running hotter than it should.

My first question is this. Are you running straight water in the system? Next, has the thermostat been replaced? Has the radiator been checked or flushed? Does the heater work?

Let me know.

Joe

If everything is good, then something was missed. Honestly, if you are getting coolant being forced from the system and it has bubbles, it has to be the head gasket or even a cracked block or cylinder head. Do me a favor. Check engine compression. Here are links that show how to check for a bad head gasket as well as how to check for compression. You may have to do what is called a leak down test.

https://www.2carpros.com/articles/symptoms-of-low-compression

https://www.2carpros.com/articles/the-reasons-for-low-compression

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/head-gasket-blown-test

If we find there is one cylinder that is much different than the others, suspect the gasket. Also, let me know how the gasket was checked. In addition, how was the thermostat checked? The only way to do it is to remove it. At that point, it's crazy not to replace it.

Here is a video that shows how to confirm the gasket is good. I recommend doing it.

https://youtu.be/5zpNjYmmiYY

Let me know what you find. Please feel free to ask other questions. Based on your description, at this point, I really feel a bad gasket was missed.

Let me know. Also, let me know what you mean by the heater issues.

Take care,
Joe

Thanks for getting back with me. That's good news. I wish they all could work out that good. I'm glad you got it fixed. Take care and let us know if you have questions in the future.

Joe