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2004 impala overheating. Changed thermostat already.

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Anna, thermostats don't fail all that often. If you are overheating after a new one, the problem most likely resides inside the radiator. Radiators can get plugged with gunk over time if they are not flushed at least occasionally. Have you tried that yet?

Does the overheating happen while the car is moving or only when at idle for a period of time?

Is the coolant less than two years old? If it is more, I recommend replacing it after doing a cooling system flush.

If you still experience overheating after that, I recommend having a good radiator shop give it a look.

Good luck.

Posted on May 12, 2014

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Posted on Jan 02, 2017

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SOURCE: how to change 2004 impala thermostat

the thermostat is on the rear of engine above the transmission 2 bolts hold its housing bolts are horizontal

Posted on Mar 20, 2009

beduncan
  • 73 Answers

SOURCE: 2004 Pontiac Grand Prix OVERHEATING!!!

Have you shop perform a "leakdown test." You probably have a bad head gasket )or a leak in the gasket).

Posted on Aug 06, 2009

GARYca
  • 672 Answers

SOURCE: 2004 Lincoln LS V8 overheating!!

check your radiator fan if its powering on when engine runs hot. Test if there is power at the fan's electrical connector when car is running and temp guage is at half. If there isnt any power on, check your relays and fuses. Hopefully this helps

Posted on Aug 16, 2009

Testimonial: "Thanks for your great suggestion on my overheating problem on my 2004 Lincoln Ls, I will check it out tomorrow!!! Thanks again, Ed"

  • 21 Answers

SOURCE: 1998 ford Taurus 24v DOHC Overheating not thermostat

check to see if eans coming on if they dont then its fan relay if they are the rad is pluged or ther is an air pocket in the cooling system there should be a bleeder on it

Posted on Oct 06, 2009

  • 5 Answers

SOURCE: 2004 jeep grand cherokee overheating.

This happened to me. After I had my power steering pump replaced. It took me 3 places to finally find out the problem. When the garage put the power steering back on they didn't get it on correctly, I don't understand all the details but it somehow I was getting radiator fluid on my belts. Which caused no heat and overheating. It took a radiator place to figure this out. I took it to Jeep and they told me it was the power steering pump.

Posted on Feb 07, 2010

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2 Answers

I have a 2004 impala, how do I find the temp sensor? Already changed radiator, pump. The fans won't turn on until I turn on AC. Pls help


You will need a scan tool to read the coolant sensor, or you can just throw away $ by replacing it blindly. It is located by or on the thermostat housing.

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may need the air bleed procedure does not sound like there is enought coolant in it and is there a leak

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The coolant sensor is bad,change it out,and bleed the air out of the cooling system,the cooling fans should come on on there own,and go off on there own,this is with the ac off.When the cooling fans do this,then it is cooling down correctly.If this was helpful,please rate,by the way,the overheating is most likely from the cooling fans not coming on,this is the reason,thank you,and please rate.

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might be the temp sensor on your cylinder head, remove and test it...
hope this helps

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