Engine Overheating Issue water pump, radiator, thermostat and temperature sensor have been replaced

MIZZLAWANDA

MEMBER
2005 CHEVROLET EQUINOX
4WD
AUTOMATIC
147,000 MILES

Hello, I am having an overheating with my vehicle. The water pump, radiator, thermostat and temperature sensor have been replaced.
I have gotten it flushed, tested and no leaks. It was overheating at first but once I got things fixed it stopped for like 6 months. Then I got it tested no leaks and then flushed. Started working normal again for about 2 months. Now here we are again and it wont stop overheating at all. At first only overheating at idle and I could press in gas and it would stop. Now I cannot even make it down the road it instantly overheats. I can cut it off and instantly able to crank back up. I know a car doesn't overheat in seconds literally. Please need help.

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

Sounds like you had a system full of dirt and debris if you had to flush it so many times.

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

My concern is this. From all the overheating, I am concerned the head gasket may have been damaged leaking compression into the cooling system. That would account for the instant overheating.

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

Did anyone check and see if the fan was working correctly?

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

Roy

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Thursday, July 1st, 2021 AT 1:06 PM

MIZZLAWANDA

MEMBER
4 POSTS

It has only been flushed once I worded that part wrong. No one has checked the fan and I do have a concern about that. Also I am starting to think the fan is not working properly; it stays on to long after I turn off the car. It is very loud! But as soon as I turn the ignition key over once it stops! Should I get it replaced?

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Thursday, July 1st, 2021 AT 1:06 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

It needs to be tested but that has nothing to do with the overheating instantly. I am afraid you have damaged the head gasket.

I attached some charts to follow for the overheating. Once it is determined the failure and repaired, then yes, replace the fan.

Roy

Cooling Fan Motor Replacement - Electric

Removal Procedure

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1. Remove the cooling fan and shroud from the vehicle.

2. Important: The fan and motor assembly is a balanced assembly. Be sure to mark the relationship of the fan to the motor shaft to ensure the balance is maintained.

Place a scribe mark (3) on the fan (2) hub and the motor shaft (1).

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3. Remove the fan retaining clip (1) from the motor shaft (2).
4. Discard fan retaining clip (1).

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5. Remove the fan (1) from the motor (2).

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6. Remove the fan motor screws from the fan shroud.
7. Remove the fan motor from the fan shroud.

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Thursday, July 1st, 2021 AT 1:06 PM

MIZZLAWANDA

MEMBER
4 POSTS

Okay. Thank you so much.

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Thursday, July 1st, 2021 AT 1:06 PM

MIZZLAWANDA

MEMBER
4 POSTS

One last thing. I have been making little rips down the street and when the car gauge goes all the way to red I am able to still drive on it. While the temperature gauge is on red and it never shuts off unless I turn it off. Never steams under hood it doesn't do anything. What does that mean? Is it safe to make small trips or should I not drive at all?