Radiator coolant overflowing

Tiny
EX094
  • MEMBER
  • 1986 TOYOTA COROLLA
  • 1.3L
  • 2WD
  • MANUAL
  • 17 MILES
Recently the coolant from the radiator has started to overflow through the reservoir tank and foamy bubbles were being formed in the radiator. So I thought it was a blown gasket. Took it for a replacement but the head gasket turned out to be in great condition. I've bled the radiator two to three times still it overflows after driving it.
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Thursday, January 24th, 2019 AT 7:45 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
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
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Friday, January 25th, 2019 AT 5:48 PM
Tiny
EX094
  • MEMBER
No sir, I'm using coolant and not straight water, the thermostat was also checked and it passed the tests. The radiator was flushed multiple times though the heater has some problems
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Friday, January 25th, 2019 AT 9:26 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
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
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Saturday, January 26th, 2019 AT 5:32 PM
Tiny
EX094
  • MEMBER
Hey Jacob, Thanks for all your help. Got the problem sorted out, it was a clogged radiator after all because I used normal tap water instead of a Coolant so it corroded and jammed all the lines in the radiator plus the pump, after a cleanup it's back to normal :D Also the gasket was absolutely fine.
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Wednesday, March 20th, 2019 AT 8:30 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
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
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Wednesday, March 20th, 2019 AT 9:05 PM

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