Chirping Noise From Belt Area



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Thread: Chirping Noise From Belt Area

  1. #1
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    Chirping Noise From Belt Area

    2004 Town and Country Touring

    Hello everyone. A few weeks ago i had my mechanic change my serpentine belt. it was making some noise when the engine was damp or cold. He told me he wasn't able to make it tighter and that the belt seemed to be just slightly too long at this point. He replaced it. All was well.

    This past weekend I noticed some chirping coming from the engine. When I looked closer, i can tell it is coming from about the same area as before. But, this time it is chirping any time I accelerate. I called him this morning again and he thinks maybe there is a bad bearing in the pully system. It seems to be getting louder as i continue to drive. Seems to be basically quiet when just idling.

    Would you concur? Anything else I should consider?

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  3. #2
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    The belt tensioner could also be bad. If the belt doesn't get tight enough, it will chirp or squeal under acceleration.
    Candy the van. '98 Sport 3.8L 132,200 miles. Used trans at ~96k. Great piece of my life and a fine van.

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    Thanks. Would you expect that to be a pricey repair?

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    They're not all that expensive. My 2007 has been through 3 of them, all under warranty. Also look at the belt itself. The Mopar belt has a textured top surface that stays quiet when running on a smooth pulley. I tried a Napa belt on it, but the slick top surface would chirp on the smooth pulleys. Going back to the Mopar belt quieted it back down. Whenever I do have to replace the belt, I'll probably buy a Mopar one.
    '11 Toyota Camry | 2.5/6AT | Sandy Beach
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    Could be the tensioner as was mentioned. Might check your water pump, too. You'll have to be under the vehicle and look for dampness around the shaft of the water pump.

    And watch the vibration dampener (crankshaft pulley) while the engine is running to make sure it's not wobbling. I just replaced the pulley and water pump on my '03 because of the squeaking.
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    I had a squeak on cold damp start-ups on my 03 and when I checked the belt & pulleys I noticed that there was a little play in the idler pulley which is the easiest one to see & check. I replaced it and so far no squeaks. I managed to change it without removing the belt by putting a wrench on the tensioner from below and using a floor jack to relieve the belt tension just enough to get the idler off. That saves the hassle of removing and replacing the belt.
    Moby Van--2003 SWB 3.3
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    Had a similar problem, I had to replace the tensioner and the alternator. All the noises went away with the repair.

    Initially I was concerned because the noise seemed to diminish when I turned off the AC so I though it might be the compressor, but the main culprit apparently was the alternator.

  10. #8
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    I had the same problem - fixed it today. - Replaced the tensioner and Idler pulley. Took less than 1 hour. Fixed the squeal.

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