Overheating after replacing the thermostat?

2008 MERCURY GRAND MARQUIS
220,000 MILES • 4.7L • V8 • 2WD • AUTOMATIC
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MAJALESYA
  • MEMBER
  • 1 POST
I had the thermostat replaced on it, the cooling system bled out, and oil changed on it. It still overheats going on the interstate. I don't know what is causing the at this point. I noticed it was bubbling and smoking on top of the engine when I opened the hood.
Jun 9, 2023 at 12:00 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
It sounds like you have a defective thermostat, or it is installed backwards which will make the engine overheat. Here are two guides to help and I have included instructions on how to change the thermostat out:

https://www.2carpros.com/articles/replace-thermostat

and

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Check out the images (below). Please let us know what you find.


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Jun 10, 2023 at 10:37 AM
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