Question about 2004 Mazda 6

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One pulley does not move all the time with the serpentine belt, but when it does you can hear a rattling sound and when the pulley stops so does the sound.

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  • ede98058 Apr 17, 2009

    it makes the noise and the pulley cycles on and off even when the ac and heater are off. also when i give it gas, but when i let off the gas the noise stops. when idling and everything off the fan starts to move when the pulley does too.

  • Tim Brown
    Tim Brown May 11, 2010

    I think your hearing the a/c clutch activating. does it come on when you turn your ac or defrost on?

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  • 234 Answers

That should be your air conditioner pump. If you turn off the AC or the defroster it shouldn't turn on.

If it is very noisy it should be replaced. There should be a wire or plug on it that you can disconnect if you want it to quit running.

If you do disconnect it, your air conditioning will not work anymore.

There is a magnetic clutch that activates whether the pump is running or not

Posted on Apr 15, 2009

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