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Loud squaling noise

This is a discussion on Loud squaling noise within the General Help forums, part of the LSx Technical Help Section category; So I started my car up last night and it was making a God awful noise, like a bad belt ...

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    Member RedSuperSport's Avatar
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    Loud squaling noise

    So I started my car up last night and it was making a God awful noise, like a bad belt or a pulley needing lubed, but the more I listened and tried to fund the location it sounded like it was coning from the driver side of the car, by the head under the cowl, any ideas? The Boise almost started to sound like a metal ball bearing in a metal tube moving back And forth squeking and increasing speed as i raised the rims. Its a horrible noise

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    Member RedSuperSport's Avatar
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    Pardon the spelling I typed it as soon as I woke up, ill try and post a video tomorrow

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    Senior Member Danger731's Avatar
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    tensioner pulley
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    Senior Member justinmc978's Avatar
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    Quote Originally Posted by Danger731 View Post
    tensioner pulley
    agreed, lube the tensioner. if that doesnt work change the belt, cheap and easy.

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    Electrical Engineer KMdef9's Avatar
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    Pinpointing a noise, especially a rotating one, under the hood can be deceiving. So, like the rest, I assume a pulley/belt issue.

    Try working the tensioner back and forth, hit it with some lubrication (don't get any on the belt) and see if that cures it. If it reduces the noise, you know you have a bad tensioner pulley or bad belt.

    (You could try belt dressing at this point, but I don't use it and am not going to recommend it for that reason)

    Next would swap the belt(s) out for gatorback and gatorback only.

    If you still have a rotating noise after that, it's most likely time to replace pulley's. Idler first, then the tensioner. Hopefully you don't have to go any further than that, as it will start to get pretty pricey.

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    Spaz is My Mentor SMWS6TA's Avatar
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    Use a redneck stethoscope - take a long screw driver or a long metal rod and place it on each rotating part as the car idles. Next place it to your ear. You'll hear noises, move to each rotating pulley wheel or tensioner. When you get to the one that is squealing really loud compared to the others that is the bad part. The bearings will either be really loud or it will sound like they are grinding. Either way it will sound much different when compared to the others.


    Please be careful.


    Here is a video that will show you what a mechanical stethoscope is and how to use it. Fast forward to 1:50


  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
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    I agree with all of the above. Mine squeals when it is humid or raining. I have to change out my belts soon.

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