Question about 2004 Chevrolet Impala

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How can I tell how long my heater core has been bad in my 2004 impala?

My Chevrolet Impala has a heater core leak. I found this after I bought the car. So I'm trying to find a way to guess how long it's most likely been like this. I've only had the car for 4 weeks and just found the problem. I'm trying to prove to the dealership they sold me a bad car.

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You can tell by the build up of the white powdery dried engine coolant around the area of the leak on the core. That is the only way.

Posted on Oct 30, 2012

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  • kill3r_turtl
    kill3r_turtl Oct 31, 2012

    But how will I be able to tell the age? I just need to prove it's been there for over a month at least.

  • yadayada
    yadayada Oct 31, 2012

    You can't tell how long exactly, no way to prove that. If you feel this strongly hire an attorney or file a small claims suit.

  • yadayada
    yadayada Oct 31, 2012

    Please rate my help for fixya. It is all iask for my Free time to answer this.

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SOURCE: 2004 Chevy Impala no heat from defrost or heater

No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

Posted on Sep 22, 2009

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j_del
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SOURCE: 2004 Chevy Impala no heat. Fan OK. Engine warms

Your heater core is clogged. You can fix it. Disconnect the two heater hoses and put one into a bucket. Use an air compressor to blow into the other - it'll flush the contents into the bucket. Then reverse it - put the hose you blew into, in the bucket, and blow into the one that was in the bucket. This way, whichever side of the core had the clog, you can blow it out. Reconnect the heater hoses, and then burp the system or you can end up with air bubbles in the cooling system that can cause you to overheat. Click my screenname, go to Tips and Tricks, and follow the procedure there - it'll walk you through the whole procedure step by step.

Posted on Dec 23, 2009

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I just got this 2004 impala police car. I found coolant inside on floor. I can tell it flow from the center of underneath control console. Can any one give me idea how to fix it? Thanks Hanping


unfortunately it is not an easy fix. Your heater core is bad. The heater core is behind the glove box. you may be able to go in under the dash on passenger side, which is where it should be leaking at, and pull it out there. However, it may be easier to remove the glove box and re-install it after you change the core. YOu could have a loose hose on it, however I bet it is a bad core.

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Heater core instructions for 04 Chevy Impala SS


Before you go thru that expense. If it is water leaking,check the evaporator. Sometimes it gets plugged with debris. So first, decide if it is water or anti-freeze. Also, I have taken the heater hoses off of the inside of the motor area and flushed the core out. It works on some.

Jun 01, 2009 | 2004 Chevrolet Impala

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