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My vehicle will start to overheat after driving for a long time?

Tiny
TORUMALEX7
  • MEMBER
  • 2005 PONTIAC G6
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 137,000 MILES
My vehicle will start to overheat after driving for a long time. I was stuck in traffic on the freeway for about an hour and it’s about 110 degrees in Las Vegas. My temperature rose to 205 then went back down to 200 degrees, the car will only do this on hot days, it repeated did this several times while I was on the freeway. When I got home and shut the car off the fans still stayed on. The car has never done that before. Within the last couple of months, I replaced the radiator, hoses, thermostat, cooling fans and water pump. My fans come on as they should. Coolant levels are fine as well.
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Wednesday, July 12th, 2023 AT 7:33 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,623 POSTS
This is a sign of a blown head gasket.

Here are two guides to help us confirm the issue:

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

and

https://www.2carpros.com/articles/recognizing-the-symptoms-understanding-a-blown-head-gasket-in-your-vehicle

Please go over these guides and get back to us.
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Thursday, July 13th, 2023 AT 1:37 PM

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