General Strange noise under the hood, alternator?

Discussion in '7th Generation (2003-2008) [Acura TSX]' started by jaran, Monday 14th Mar, 2016.

  1. jaran Club Member ★ ☆ ☆ ☆ ☆

    Hi guys, and girls..

    Lately, aprox. 1 week i am hearing strange noise which i can't desribe with words so i'm puting my problem on youtube hoping you can help me. The noise is getting higher between 1000 and 2000rpm and i think it last even further. Sorry for bad english. Today my mechanic replaced tensioner puller bearing and serpentine belt and problem is stil here.


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    The noise starts at 0:05.
     
  2. jd1959 Valued Contributor ★ ★ ★ ☆ ☆

    Ireland Zack Kilkenny
    367
    180
    When you had the belt off did you spin each of the pulleys? Sometimes you can hear or feel the bad bearing. Another thing I do is the 'screwdriver stethoscope' (in my case about 2 1/2 foot worth of 1/2" extension bars), method to locate the problem bearing set, mind yourself around the belt drive if your going to try and locate the problem that way.
     
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  3. SpeedyGee Administrator Staff Team

    England Speedy Birmingham
    14,999
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    I use the same technique as @jd1959 described with a long handled screwdriver.

    Sorry I can't listen to the sound right now, I have a 4 month old baby fast asleep near by.

    Did the noise disappear when the aux belt was off ?
     
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  4. jaran Club Member ★ ☆ ☆ ☆ ☆

    Mechanic said that tensioner puley was loose so he replaced just the bearing of that hoping it will solve the problem. How reliable is "stetoscope" method? If there was problem with any of the alternator pulleys should i see bad voltage readings with multimeter?
     
  5. SpeedyGee Administrator Staff Team

    England Speedy Birmingham
    14,999
    5,593
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    If there's any grinding coming from any particular pulley you will hear loud and clear.
     
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  6. Simes Club Member ★ ☆ ☆ ☆ ☆

    @jaran - go outside and try it- you'll be amazed at what you can hear from a very specific point.
     
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  7. jaran Club Member ★ ☆ ☆ ☆ ☆

    Today mechanic listened with stetoscope and no noise from pulleys
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    We are waiting now few km more for noise to 'develop'
     
  8. moi Club Member ★ ☆ ☆ ☆ ☆

    United Kingdom Gm Gardne Tavistock
    78
    38
    ...really long shot but might be a heat shield rattling , perhaps over the cat?
     
  9. jd1959 Valued Contributor ★ ★ ★ ☆ ☆

    Ireland Zack Kilkenny
    367
    180
    I was thinking heat shield as well as a possibility, or something like a loose metal pipe rattling.
     
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  10. John Hamer Club Member ★ ☆ ☆ ☆ ☆

    United Kingdom John Waltham Abbey
    147
    47
    Alternator clutch pulley gone for sure, replace the whole unit it's cheaper in the long run
     
  11. jd1959 Valued Contributor ★ ★ ★ ☆ ☆

    Ireland Zack Kilkenny
    367
    180
    Glad you found the problem before it causes further issues.:Thumbup:
     
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  12. jaran Club Member ★ ☆ ☆ ☆ ☆

    Shouldnt alt pulley be some kind loose when moving it with hands when aux belt is of?
     
  13. John Hamer Club Member ★ ☆ ☆ ☆ ☆

    United Kingdom John Waltham Abbey
    147
    47
    Take a look at this

     
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  14. Simes Club Member ★ ☆ ☆ ☆ ☆

    Great link.
     
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  15. jaran Club Member ★ ☆ ☆ ☆ ☆

    tomorrow alternator is coming out... will keep you updated
     
  16. jaran Club Member ★ ☆ ☆ ☆ ☆

    It turned out it was water pump bearing so the pump was replaced and noise is gone :HobbyHorse:
     
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  17. John Hamer Club Member ★ ☆ ☆ ☆ ☆

    United Kingdom John Waltham Abbey
    147
    47
    Good news well done.
     
  18. Nels Moderator Staff Team

    A section of broom handle has a similar effect.
    Good to read you've finally got to the bottom of this.
     
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