Engine heating up too fast

Tiny
MEMBER21
  • MEMBER
  • 2000 CHEVROLET MONTE CARLO
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 103,000 MILES
I have had it checked with the Chevrolet dealership they cannot find anything wrong with it. They said it needs to be getting hot but they will not let it get hot. It still overheating, it heats up real fast even when I go four blocks that goes halfway up on the needle. I am thinking it might be one of the cooling fan module but I cannot find the relay on my car. I need to know where it is at and how to remove it and it has got a new one. One of the fan seems to be working but the other one does not when the engine is hot. I also like to know how to change the thermostat if I could do it on my own.
Sunday, July 15th, 2018 AT 9:04 AM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning.

Does it go to the red on the gauge or just half way?

The one fan is for AC when you have it on. The other is cooling fan that comes on at about 215 degrees.

As far as a cooling fan module, no, there is not a module for that. The engine control module controls the fans based on inputs from the coolant sensor.

Roy

Thermostat Replacement (3.4L)

Tools Required
- J 38185 Hose Clamp Pliers

Removal Procedure
1. Remove the air cleaner intake duct.
2. Partially drain the cooling system.
3. Use the J 38185 to reposition the hose clamp from the water outlet housing.

imageZoom/Print

4. Remove the radiator inlet hose from the water outlet housing.
5. Remove the exhaust crossover pipe.

imageZoom/Print

6. Remove the water outlet housing bolts.
7. Remove the water outlet housing and the gasket.

imageZoom/Print

8. Remove the thermostat.
9. Clean the water outlet mating surfaces.

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

https://www.2carpros.com/articles/symptoms-of-an-overheating-engine
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Sunday, July 15th, 2018 AT 11:06 AM
Tiny
MEMBER21
  • MEMBER
  • 5 POSTS
No, it does not go all the way to red. It goes a little past halfway up but it does not overheat when the AC is on at 8 overheat on the interstate to air from the outside flow should be going to engine which it does not.
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Sunday, July 15th, 2018 AT 11:19 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
If there was no air flow, then it would overheat.

I would start by changing the thermostat. That may take care of the entire issue.

Roy
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Sunday, July 15th, 2018 AT 11:21 AM
Tiny
MEMBER21
  • MEMBER
  • 5 POSTS
The fans have a relay on them it is on the left side facing the car so worth the cooling. Thanks for the engine you are talking about the engine cooling module.
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Sunday, July 15th, 2018 AT 11:22 AM
Tiny
MEMBER21
  • MEMBER
  • 5 POSTS
I do not know whether thermostat located on my car I just had one installed in last year.
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Sunday, July 15th, 2018 AT 11:30 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
I just sent you all the information on the location of the thermostat.
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Sunday, July 15th, 2018 AT 11:34 AM

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