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Cannot figure out this squealing sound

Discussion in '2nd Gen. Tacomas (2005-2015)' started by anthony250f, Jun 21, 2018.

  1. Jun 21, 2018 at 5:50 PM
    #1
    anthony250f

    anthony250f [OP] Well-Known Member

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    I can not figure out this sound. I originally thought ac Compressor since it only happened when the ac engaged. Well ac compressor was replaced but it’s STILL THERE. I’m starting to think alternator ? All the idlers and tensioner bearings are brand new
    https://m.youtube.com/watch?v=b25Kk2PBQxM
     
    Last edited: Jun 21, 2018
  2. Jun 22, 2018 at 4:48 AM
    #2
    709GADE

    709GADE Well-Known Member

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  3. Jun 22, 2018 at 7:34 AM
    #3
    anthony250f

    anthony250f [OP] Well-Known Member

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  4. Jun 24, 2018 at 9:57 AM
    #4
    anthony250f

    anthony250f [OP] Well-Known Member

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    Bumpppppp
     
  5. Jun 24, 2018 at 9:58 AM
    #5
    EatSleepTacos

    EatSleepTacos Well-Known Member

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    That's a new one. Almost sounds like a drag car at idle haha

    Sorry I can't be of more help. I have no clue.
     
  6. Jun 24, 2018 at 10:03 AM
    #6
    anthony250f

    anthony250f [OP] Well-Known Member

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    I removed belt and spun all of the bearing and they all sounded fine ?!
     
  7. Jun 24, 2018 at 10:07 AM
    #7
    desertrunner24

    desertrunner24 Well-Known Member

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    Remove the belt and start it. Is the noise still present?
     
  8. Jun 24, 2018 at 10:16 AM
    #8
    anthony250f

    anthony250f [OP] Well-Known Member

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    I’m gonna have to wait u til it makes the noise again. It is really intermittent and does not make this sound MOST of the time. Just came back from the garage to try to find it but it’s silent currently.
     
  9. Jun 24, 2018 at 10:22 AM
    #9
    desertrunner24

    desertrunner24 Well-Known Member

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    When it returns try to spray some water or a light mist of wd40 on each pulley that may isolate it if the noise goes away when hit with it
     
  10. Jun 24, 2018 at 1:00 PM
    #10
    Tennessee YODA

    Tennessee YODA Damn pigeons

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    Got the same issue but does it with the ac off and on doesn’t do it all the time really started to see some correlation when it’s colder weather, it’s synchronized with the throttle more throttle the louder it gets , curious to what you come up with , cause I’ve had no luck diagnosing the issue
     
  11. Jun 24, 2018 at 2:13 PM
    #11
    WILLIAM ROBERT

    WILLIAM ROBERT Well-Known Member

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    Maybe it’s the alternator. Turn on all the lights, heater, accessories and see if the noise comes back. As stated before, when it happens try spraying WD-40 at the bearings/ alternator and see if the noise changes or goes away.
     
  12. Jun 24, 2018 at 2:13 PM
    #12
    jboudreaux1965

    jboudreaux1965 Ragin Cajun Fan

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    Get a stethoscope and poke around, they are like $10 at harbour feight.Screenshot_20180624-161122_1.jpg
     
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  13. Jun 24, 2018 at 5:00 PM
    #13
    jboudreaux1965

    jboudreaux1965 Ragin Cajun Fan

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    You ever take the belt off and check the idler pulleys and tensione pulley?
     
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  14. Jun 24, 2018 at 5:18 PM
    #14
    Tennessee YODA

    Tennessee YODA Damn pigeons

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    I have not , is that where I need to start? thought ab doing the wd40 also. It’s happens usually in the am when I’m leaving for work but not every day so it’s been hard to really have the time to check it , with it being so sporadic does that sound like it could be the idler and tension pulleys.
     
  15. Jun 24, 2018 at 5:34 PM
    #15
    jboudreaux1965

    jboudreaux1965 Ragin Cajun Fan

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    Thats where I's start. Won't cost you anything but a few minutes of your time. See if any of them wobble back n forth and see if they spin pretty freely without making too much of a crunchy sound. If it spins waaaay to freely, another sign the bearing maybe bad. If you find a suspected bad one, to save a few bux, bring it to a local bearing shop see if they can match the bearing, so far I havent had an issue doing that. A bearing is $10-$15, an idler pulley is about $40, a complete tensioner is $125+.
     
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  16. Jun 24, 2018 at 5:37 PM
    #16
    jboudreaux1965

    jboudreaux1965 Ragin Cajun Fan

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    14mm socket and breaker bar counter clockwise on tensioner to loosin the belt.
     
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  17. Jun 24, 2018 at 6:13 PM
    #17
    Tennessee YODA

    Tennessee YODA Damn pigeons

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    Will do thanks for the info man
     
  18. Jul 19, 2018 at 10:27 PM
    #18
    anthony250f

    anthony250f [OP] Well-Known Member

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  19. Jun 8, 2019 at 3:56 PM
    #19
    anthony250f

    anthony250f [OP] Well-Known Member

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