Coolant blowing out overflow but not overheating?

2015 DODGE CHARGER
149,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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JACOBDR/T
  • MEMBER
  • 1 POST
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.
Feb 23, 2023 at 9:07 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 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
Feb 23, 2023 at 12:47 PM
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