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04 w9 random very loud squealing noise in the engine compartment.

Discussion in 'Kenworth Forum' started by John7704, Sep 9, 2018.

  1. Sep 9, 2018 #1
    John7704

    John7704 Bobtail Member

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    Sep 9, 2018
    0
    I’m having a random loud squeal from the engine compartment. We’ve changed ac compressor, serpentine belt, Turbo, turbo gaskets, and manifold gaskets, also new belt tensioner. Can’t pinpoint the noise. I’ve listened to the alt bearing with stethoscope, that’s not it either. Any ideas?
     
    John7704, Sep 9, 2018
    John7704, Sep 9, 2018
    #1
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  3. Sep 9, 2018 #2
    AModelCat

    AModelCat Road Train Member

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    145,300
    Jul 7, 2015
    Canuckistan
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    Are any pulleys worn?
     
    AModelCat, Sep 9, 2018
    AModelCat, Sep 9, 2018
    #2
    Opendeckin Thanks this.
  4. Sep 10, 2018 #3
    201

    201 Road Train Member

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    Apr 16, 2014
    high plains colorado
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    Fan clutch?
     
    201, Sep 10, 2018
    201, Sep 10, 2018
    #3
    magoo68, Zeviander and Opendeckin Thank this.
  5. Sep 16, 2018 #4
    w9l

    w9l Medium Load Member

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    Oct 12, 2013
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    I had a similar squeal I couldn't seem to find. Front countershaft bearing in Roadranger transmission turned out to be the culprit.
     
    w9l, Sep 16, 2018
    w9l, Sep 16, 2018
    #4
  7. Sep 16, 2018 #5
    Zeviander

    Zeviander Road Train Member

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    Jan 23, 2015
    Winnipeg, MB, CA
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    If it's a CAT, those things will squeal like a stuck pig when worn out.
     
    Zeviander, Sep 16, 2018
    Zeviander, Sep 16, 2018
    #5
    201 Thanks this.
  8. Sep 16, 2018 #6
    peterbilt_2005

    peterbilt_2005 Medium Rare

    3,906
    29,188
    May 4, 2013
    Commie-fornia come visit we have C. A. R. B
    0
    Check exhaust manifold the bolts and gasket have been prone to loosen up. Causing a whistle.
     
    peterbilt_2005, Sep 16, 2018
    peterbilt_2005, Sep 16, 2018
    #6
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