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C15 Turbo troubleshooting

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by A_far_cry_from_perfect, Sep 20, 2023.

  1. Sep 20, 2023 #1
    A_far_cry_from_perfect

    A_far_cry_from_perfect Bobtail Member

    3
    0
    Mar 4, 2023
    Alberta, Canada
    0
    Recently (3 days ago) replaced the top turbo on a c15 cat acert. Truck now has a constant whirling/squealing noise coming from turbo, to the point that I've had to park the truck because the noise is unbearable. At first sounded just like the whirring of the fins but has progressed to an almost screeching. Has anyone else had this issue? Will try to add video. Video I currently have is too large.
     
    A_far_cry_from_perfect, Sep 20, 2023
    A_far_cry_from_perfect, Sep 20, 2023
    #1
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  3. Sep 21, 2023 #2
    AModelCat

    AModelCat Road Train Member

    29,011
    156,452
    Jul 7, 2015
    Canuckistan
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    Sounds like a leak.
     
    AModelCat, Sep 21, 2023
    AModelCat, Sep 21, 2023
    #2
    Last Call and Magoo1968 Thank this.
  4. Sep 21, 2023 #3
    blairandgretchen

    blairandgretchen Road Train Member

    13,305
    71,208
    Dec 9, 2011
    South west Missouri
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    Check CAC for boost leaks.
     
    blairandgretchen, Sep 21, 2023
    blairandgretchen, Sep 21, 2023
    #3
    Last Call and Magoo1968 Thank this.
  5. Sep 21, 2023 #4
    Magoo1968

    Magoo1968 Road Train Member

    2,028
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    Mar 18, 2021
    St Malo mb
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    High idle then spray soapy water on all joints or better yet smoke test it ..new turbo probably produces more boost than old turbo so leak got worse .. btw if old turbo came apart it may of damaged the second turbo .
     
    Magoo1968, Sep 21, 2023
    Magoo1968, Sep 21, 2023
    #4
    Bean Jr. Thanks this.
  7. Sep 21, 2023 #5
    bjytech

    bjytech Light Load Member

    231
    209
    Nov 9, 2013
    Ohio
    0
    I've seen many times after someone had a turbo changed where the steel accordion tubing then cracks because it wasn't loosened on both ends and reset so that it sits "neutrally" to the new turbo. This will cause them to crack and the leak usually screeches pretty loudly.
     
    bjytech, Sep 21, 2023
    bjytech, Sep 21, 2023
    #5
    Magoo1968 and Oxbow Thank this.
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