Overheating even when idling?

Tiny
TLUCAS86
  • MEMBER
  • 2016 CHEVROLET TRAVERSE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
Engine fans are always running for a while after shutting off and now is overheating even when in idle. No codes are coming back with computer check. I hear a gurgling from the coolant after shutting off the car and the large hose is hot from the coolant to engine. I think its either a clogged hose or the thermostat. How could I be sure without a full service diagnosis?
Friday, July 29th, 2022 AT 10:36 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Typically, when the thermostat is stuck closed, it won't allow coolant to flow, and you will have a significant temperature difference between the upper and lower radiator hose. One will be hot and stiff and the other will be cooler and softer.

Take a look at this guide. It goes over the troubleshooting steps for overheating.

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

Let me know what you find or if you have any questions.
Thank you.
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Friday, July 29th, 2022 AT 4:11 PM

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