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Coolant blowing out overflow but not overheating?

Tiny
JACOBDR/T
  • MEMBER
  • 2015 DODGE CHARGER
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 149,000 MILES
Recently purchased the car listed above (RT), it has been blowing coolant out of the overflow tube on the reservoir. We bled the coolant system Tuesday, and all was fine until today temperatures rose to 215 while it was blowing coolant. No coolant in oil, and not blowing smoke. The engine is still performing normally.
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Thursday, February 23rd, 2023 AT 5:07 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

It sounds like you may have a head gasket issue that is allowing compressed air to enter the cooling system. Do me a favor. Take a look through this link and let me know your thoughts. There is one section that explains how to check for air bubbles in the coolant. That is where I would start. I'm basing that on your description.

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

Let me know what you find.

Joe
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Thursday, February 23rd, 2023 AT 8:47 PM

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