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Help!!! Chasing whining sound Cat C15 Acert

Discussion in 'Ask An Owner Operator' started by W903B, May 6, 2020.

Page 1 of 3
  1. May 6, 2020 #1
    W903B

    W903B Light Load Member

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    Jun 5, 2016
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    Hello all, I m chasing a whining sound which I can't find
    Symptoms, whining sound ( like sound from speakers) is coming from right side or front of Cat C15 Acert MXS sound can clearly heard after quick throttle like sound is followed by rpm , less on idle more sound on rpm.
    What I did.... Cat house and local mechanic pointed turbo and I changed it mounted on exhaust manifold side 10R2407 sound came back
    Took both belts replaced idler no change.
    No exhaust leak but changed Flex pipe next to turbo , no change.
    No codes no power issues , rebuilt in October 2019
    What you guys advice Thanks in advance
     
    W903B, May 6, 2020
    W903B, May 6, 2020
    #1
    Deere hunter Thanks this.
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  3. May 6, 2020 #2
    FoolsErrand

    FoolsErrand Road Train Member

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    Spray everything with windex and have someone watch for bubbles when u rev in up. Boost leaks are a very annoying variety of sounds. The throttle delay coincides with a rise in boost and thus leakage.
     
    FoolsErrand, May 6, 2020
    FoolsErrand, May 6, 2020
    #2
    W903B and Deere hunter Thank this.
  4. May 6, 2020 #3
    Ridgeline

    Ridgeline Road Train Member

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    Just a thought ...

    If you bring the revs up is the sound delayed ramping up with you coming off the throttle being delayed going down?

    Turbos spool up and down, so it is a way to rule out turbos and boast components.
     
    Ridgeline, May 6, 2020
    Ridgeline, May 6, 2020
    #3
    W903B and Deere hunter Thank this.
  5. May 6, 2020 #4
    Deere hunter

    Deere hunter Road Train Member

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    Turbo’s whine so do drivers, wives ,children and mostly politicians. If you figure out how to stop the whining or where it’s coming from please let us know!!

    sarcasm :argue:

    but I’m betting it’s still your turbo. I’ve changed turbos many times still whining .
     
    Deere hunter, May 6, 2020
    Deere hunter, May 6, 2020
    #4
    W903B and FoolsErrand Thank this.
  7. May 6, 2020 #5
    Oscar the KW

    Oscar the KW Going Tarpless

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    Check all the bellows for cracks, sometimes they can be very hard to see.
     
    Last edited: May 6, 2020
    Oscar the KW, May 6, 2020
    Oscar the KW, May 6, 2020
    #5
    W903B Thanks this.
  8. May 6, 2020 #6
    FoolsErrand

    FoolsErrand Road Train Member

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    When i spray my wife with windex she bubbles profusely.
     
    FoolsErrand, May 6, 2020
    FoolsErrand, May 6, 2020
    #6
    HoneyBadger67, Cat sdp, 650cat425 and 3 others Thank this.
  9. May 6, 2020 #7
    Shawn2130

    Shawn2130 Heavy Load Member

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    FoolsErrand: :laughing6::laughing6::laughing6:
     
    Shawn2130, May 6, 2020
    Shawn2130, May 6, 2020
    #7
    FoolsErrand, Deere hunter and W903B Thank this.
  10. May 6, 2020 #8
    W903B

    W903B Light Load Member

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    Thank-you all , yes the noise is delayed like echo from revs/acceleration, so 1 turbo is changed I need to change the second one which is way more expensive 1888
     
    W903B, May 6, 2020
    W903B, May 6, 2020
    #8
    Deere hunter Thanks this.
  11. May 6, 2020 #9
    W903B

    W903B Light Load Member

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    Jun 5, 2016
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    I feel when truck is cold there is more noise like oooowww crying , can it be internal engine components , coz it's recently rebuilt and I can't afford another head
     
    W903B, May 6, 2020
    W903B, May 6, 2020
    #9
  12. May 6, 2020 #10
    FoolsErrand

    FoolsErrand Road Train Member

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    Driver, stop buying parts. Buy a good mechanic and only replace precisely what has failed after its been verified as the issue. It may be a $30 silicone boot or band clamp that youre throwing turbos at.
     
    FoolsErrand, May 6, 2020
    FoolsErrand, May 6, 2020
    #10
    W903B and Deere hunter Thank this.
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