Question about 2002 Pontiac Grand Am

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Temperature not regulating

2002 pontiac grandam i have changed themostat,waterpump coolant tank and cap and had radiator cleaned out.temperature not regulating what else could it be?

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  • butterbeanal Jan 31, 2009

    the heat is not working properly and it runs hot when driven a lot

  • butterbeanal Jan 31, 2009

    how do you bleed the system other than this way:drained fluid from radiator,opened bleed screw,filled tank slowly til coolant was running out of bleed screw,put cap back on tank,tightened bleed screw,ran motor at 2000-2500 rpms til norm temp,engine idle for 3 mins,allowed engine to cool and rechecked coolant.

  • butterbeanal Jan 31, 2009

    this process will not let more air into the system?

  • butterbeanal Jan 31, 2009

    this will not let more air into the system will it?

  • butterbeanal Jan 31, 2009

    thanks i will try that

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You may have gotten a bad cap. This is common. Make sutre it is not boiling out, then tr working the air out of your system by running it a few minutes. Stopping it adding fluid, Then repeat several times until it will hold no more. It should boil out all the water like this. You can open the cap on a 2002 grand am gt 3.4L when it's hot, just use a towel so the vapor is not hot on your hand. Also be sure to check it the couple following days after to make sure if you had anymore air escape the system.

Posted on May 04, 2009

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An airpocket that is usually trapped in the heater core. Check to see if both hoses are warm for the heater core if not system needs to be bleed.

Posted on Jan 31, 2009

  • Mike Gagnon
    Mike Gagnon Jan 31, 2009

    You are bleeding the system correctly, but i leave the cap off and bleed screw opened partially while i let the car idle to warm up adding fluid as needed.

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Well, I don't know how to solve it, but if you run your heat it should bring down the temperature.

Posted on Jan 31, 2009

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