Overheating at idle

2014 HYUNDAI TUCSON
77,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
Avatar
RIEBE123
  • MEMBER
  • 46 POSTS
Just had coolant changed and I had them check the thermostat also, they said they can only confirm it is opening (which it is) not if it is functioning correctly. My issue is that when I'm sitting simply idling or stuck in traffic the temperature indicator begins to rise. Any idea what this may be? I know that overheating can cause engine damage.
Sep 8, 2021 at 2:22 PM
Advertisement
Avatar
SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

If it only rises in temperature while you are stationary with the engine running, then it could be due to an issue with the radiator cooling fans.
As the vehicle sits there is little to no air flowing thru the radiator which causes the temperature to rise, but as you start to move the air flow as well thru the radiator and bring the temperature to the correct level.

Check to see if the radiator fans are coming on. Have the engine running at operating temperature and open the hood. Observe the fans. If they do not come on then that is the issue.
If the fan is not working it can be due to a bad fan motor or fan relay or coolant temperature sensor.

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works


Let me know what you find.
Thank you.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Sep 8, 2021 at 7:00 PM
Avatar
RIEBE123
  • MEMBER
  • 46 POSTS
Thanks, I really appreciate the reply. I was worried it was the head gasket. I will have it checked out-thanks again.
Sep 8, 2021 at 7:07 PM
Avatar
SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
You're welcome. Keep in mind typically with a blown head gasket you will have white smoke out of the tailpipes.

https://www.2carpros.com/articles/white-smoke-or-steam-coming-from-the-exhaust-pipe

Let me know what you find.
Sep 8, 2021 at 7:22 PM
Avatar
RIEBE123
  • MEMBER
  • 46 POSTS
Yes I will.
Sep 8, 2021 at 7:36 PM
Avatar
SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Great.
Sep 8, 2021 at 11:26 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.