Engine overheating

SDULLACK

MEMBER
2005 HYUNDAI TUCSON
2.7L
6 CYL
4WD
AUTOMATIC
115,000 MILES

Hi. When the car is on and not moving (like at a stoplight) the temperature gauge starts rising. When I start driving, the temperature gauge comes back down.

The fluids are topped off, there are no leaks, and then when I open the hood and look while the car is running, the radiator fan is running.

Any suggestions?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

It is good the fan is running but can you tell me if the fan blade is in good shape? And does it seem like the fan motor is running at full speed? There is really not to much that can be wrong except for the fan motor because it is solely responsible for cooling the engine at a stop. I have seen the fan controller go bad and run the fan at half speed. Check the diagrams below.

This guide can help:

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

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

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Tuesday, July 5th, 2022 AT 5:16 PM

SDULLACK

MEMBER
2 POSTS

Ken,

First off thanks for the response, I greatly appreciate it! I checked the fan blades, and they are all intact and no damage. The fan appears to run at full speed, but I have no point of reference if it is running at full speed or half speed.

Could the thermostat be the issue?

Thanks for the help!

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Saturday, July 9th, 2022 AT 5:07 AM

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

That was going to be my next suggestion. Here is a generic guide on how to change the thermostat out with specific instructions and the diagrams below for your car:

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

Check out the diagrams (below). Please let us know what happens.

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