Engine is overheating

WILLIE357

MEMBER
2005 CHEVROLET TAHOE
5.6L
5 CYL
2WD
AUTOMATIC
177,544 MILES

Engine is overheating, the temp runs into 260. The heater is blowing cold air.

Tuesday, November 11th, 2014 AT 8:10 AM

7 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

The two problem may not be related. If you are low on coolant it will cause this problem. When the engine has cooled down completely. Remove the radiator cap to check coolant level. Fill it up if it is low, then start the truck with the cap off and let it run till it reaches normal operating temperature and the thermostat has opened up. Make sure coolant level is still good then see is you have a leak.

Here is a guide that should help

https://www.2carpros.com/articles/car-is-leaking-coolant

If the coolant is okay then I would say the fan clutch is not working. Here is more information on the over heating problem.

https://www.2carpros.com/articles/fan-clutch-symptoms

and

https://www.2carpros.com/articles/fan-clutch-removal

and

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

Please let us know what happens so it will help others.

Cheers, Ken

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Wednesday, September 20th, 2017 AT 2:19 PM

LUIS DOMENECK

MEMBER
1 POST
2005 CHEVROLET TAHOE
4.8L
V8
4WD
AUTOMATIC
157,000 MILES

My car keeps turning off and says engine coolant hot. Checked for leaks none, both fans are working and A/C is fine. Also, got reduced power due to over heat reading. Is it the water pump or thermostat or both?

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Wednesday, September 20th, 2017 AT 2:20 PM (Merged)

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Hello,

This could be a faulty temperature sensor. The best way to tell is too see what the engine temperature is when it says its hot.

Here is a guide to help you see.

https://www.2carpros.com/articles/how-to-use-an-infrared-temperature-meter

and

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

Please run this test and get back to us so we can continue helping you.

Cheers, Ken

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Wednesday, September 20th, 2017 AT 2:20 PM (Merged)

CHAMLIN

MEMBER
1 POST
2005 CHEVROLET TAHOE

Engine Cooling problem
2005 Chevy Tahoe V8 Two Wheel Drive Automatic

this truck belongs to a friend of mine so I don't know the mileage. He told me that the temp is going up when the engine is at idle but will cool off some when the rpms go up. I'm thinking a stuck thermostat. Saw the engine for the first time this afternoon and don't see any leaks, he says he had the truck serviced not long ago and that all fluids were checked. I looked in the res and it had a little freon in it, I could smell freon when I opened the hood, but not as much as I expected for running warm. I'm still thinking a stuck thermostat but not sure and the truck belongs to my boss - don't want to be wrong!

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Wednesday, September 20th, 2017 AT 2:20 PM (Merged)

RASMATAZ