Question about 2001 Chevrolet Impala

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2000 3.8 Impala keeps overheating even after changing thermostat. Did not overheat after short trips, after changing it, but started back after driving over 20 miles. Temp gauge goes to red and coolant overflow and squirts out of upper area of radiator.

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  • beauboffo
    beauboffo Apr 26, 2012

    Bleeding the air didn't help for me. Electrical problem needed new fans, thermostat and temp. sensor. I had previously replaced the thermostat, but overheating messed up the thermostat again. If yours is an air problem, a mechanic from Chevy said you might have to fill it through the temp. sensor hole. I didn't do that to mine....I got fed up and took it to Firestone. Diagnostic was $125.

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  • Master
  • 507 Answers

Sounds like there could be an air pocket in your cooling system. If the job was done by a mechanic take it back. If a "friend" helped you, tell him to rebleed the system. Also seems like your water pump might be bad. If it was overheating before changing the thermostat and is still doing the problem only worse then I would assume the pump needs to be changed. If the pump is bad, there is no doubt that air is in the system still and causing the overheating to occur even faster.

Posted on Sep 28, 2009

Testimonial: "Thanks will check....how do u check water pump or fan relay"

  • Steven Brock Sep 28, 2009

    Easiest way to check to see if water pump is working would be to remove radiator cap, start vechile and look at coolant. If it's flowing it's working. This is a simple way to check through the RADIATOR CAP OPENING. Will not work if you have a system that is filled through the resivor.

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Posted on Jan 02, 2017

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Hello Guest and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2000 Chevrolet Impala, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose your overheating 2000 Chevrolet Impala

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

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