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High pitched whining from turbo on 2016 Peterbilt 579

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by CrimsonPatriot, Feb 24, 2021.

  1. Feb 24, 2021 #1
    CrimsonPatriot

    CrimsonPatriot Bobtail Member

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    Jan 25, 2021
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    One of my drivers has a high pitched whine from his turbo. It’s a 2016 peterbilt 579. Any chances it’s not the turbo that’s shot? I’m getting to the truck tomorrow to inspect it and see. Any help what to look at first? I wouldn’t think a gasket worn out would make that noise
     
    CrimsonPatriot, Feb 24, 2021
    CrimsonPatriot, Feb 24, 2021
    #1
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  3. Feb 24, 2021 #2
    LTL Bull

    LTL Bull Road Train Member

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    A whine or a louder noise. I had a truck that had the one box on the def system acting up and it made a horrific noise that sounded more like a grind than a whine but it was rather high pitched
     
    LTL Bull, Feb 24, 2021
    LTL Bull, Feb 24, 2021
    #2
  4. Feb 24, 2021 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

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    Start with checking the charge air cooler boots.
     
    BoxCarKidd, Feb 24, 2021
    BoxCarKidd, Feb 24, 2021
    #3
    magoo68 Thanks this.
  5. Feb 25, 2021 #4
    Goodysnap

    Goodysnap Road Train Member

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    Engine?

    I would suspect an exhaust leak. It will likely change pitch or vary with load or boost. Inspect for soot trails from the manifold to head gaskets. Cummins will most commonly be #2 or #5.
     
    Goodysnap, Feb 25, 2021
    Goodysnap, Feb 25, 2021
    #4
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