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Air Conditioner Noise

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Carp, Jun 7, 2010.

  1. Jun 7, 2010 at 9:22 AM
    #1
    Carp

    Carp [OP] Member

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    New member here. Lurking since 2007. I promise I searched first, but found no answer.

    When I turn on my A/C I am getting an odd noise that I can only hear coming from underneath. It is sort of a squeal, but more of a rumble whenever the compressor kicks on. It is LOUD. I cannot hear it in the engine compartment and it is not heard in the cab. The A/C blows hard and COLD, but the noise is making me nuts.

    Any ideas?

    Carp
     
  2. Jun 7, 2010 at 9:28 AM
    #2
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    I have similar noise but only when truck sits idle with AC on for some time. once I start driving it seems go away. I had not time to troubleshoot but have bad feeling temp is affecting the AC unit.
     
  3. Jun 7, 2010 at 11:14 AM
    #3
    FreeHeel

    FreeHeel Not Dead But Definitely Dying

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    Can you define "underneath"? You can't hear it under the hood or inside the cab?

    The main culprits for AC noise are belt, AC clutch, AC compressor and blower motor. The first 3 should be heard under the hood while the last should be more prominent inside the cab.
     
  4. Jun 7, 2010 at 11:38 AM
    #4
    Carp

    Carp [OP] Member

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    FreeHeel

    Thanks for the response. Like BlueT, it is worst when the truck has been sitting at idle. I notice it standing next to the driver or passenger door. When I lean down it gets louder. I got underneath and it is loudest. In the cab there is no noise. Under the hood there is no noise.

    Carp
     
  5. Jun 7, 2010 at 11:46 AM
    #5
    Mark C.

    Mark C. If you want it bad, you usually get it bad!

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    There is a TSB for AC and another thread where a noise fix was accomplished...I think it was blower motor or bearings.
     
  6. Jun 7, 2010 at 11:50 AM
    #6
    Mark C.

    Mark C. If you want it bad, you usually get it bad!

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  7. Jun 7, 2010 at 11:56 AM
    #7
    FreeHeel

    FreeHeel Not Dead But Definitely Dying

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    Does the noise come and go while sitting at idle or is it continuous? Does the AC continue to blow cold air while making the noise at idle?
     
  8. Jun 7, 2010 at 12:13 PM
    #8
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    Noise seems to get louder as truck stands still. To the point that no longer you can hear engine. No change in air temp inside the cab, at least not that I could feel. once truck is moving for a minute noise slowly goes away and does not show up until again gets parked for few minutes while idling with AC ON. Also noise just dont start but rather progresses from AC compressor noise (gets slowly louder and louder)
    Its the first year that my truck did that so i am curious as what is happening. Funny thing is my other car did exact same thing this year and it is Nissan so go figure. :rolleyes: None had been to the dealer and nobody touched AC.
    I have pink clutch on the fan so I would think thats the tow package but now I am wondering maybe we need heavier grade of oil in the fan clutch ... ???
     
  9. Jun 7, 2010 at 12:17 PM
    #9
    BlueT

    BlueT Well-Known Member

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    I moded 1999 Taco so much it had turned to Land Cruiser
    x2 Exact same thing, compressor is on that side underneath so that's why we probably hearing the noise from there.
    Is your truck started acting this year ???

    EDIT: Funny thing Carp your truck is 2007 also ...
     
  10. Jun 7, 2010 at 12:24 PM
    #10
    FreeHeel

    FreeHeel Not Dead But Definitely Dying

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    Kinda stumped on this one, sorry. Initially I was thinking AC clutch as if the "air gap" is out of whack (too wide) it can cause the clutch to not properly engage. This can give you the squeal type noise you describe. Doubtful this is your problem though as your AC would not continue to blow cold air as the compressor is not spinning.

    Wish I could be of more help.
     
  11. Jun 29, 2010 at 12:53 PM
    #11
    dingchavez24

    dingchavez24 Active Member

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    I've been noticing a LOUD belt shutter lately produced the A/C turning on after my 09 Sport has been idle for several hours. Since I have a manual, I thought it was the clutch but i have come to find out it is when the A/C engages under the hood several seconds after starting the truck. Has anyone else had this issue? Anyone have any suggestions for a correction? Thanks!
     
  12. Jun 29, 2010 at 8:30 PM
    #12
    FreeHeel

    FreeHeel Not Dead But Definitely Dying

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    Based on your description, I don't fully understand your problem but take a look at this http://www.tacomaworld.com/forum/technical-chat/94709-air-conditioning-blues.html thread. If it doesn't describe your problem, post back with specifics and I'll see if I can help.
     
  13. Jul 17, 2010 at 12:57 PM
    #13
    ItalynStylion

    ItalynStylion Sounds Gooooood

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    I'm having a similar issue as BlueT. Mine is really only when idling or sitting and idling with the AC on. First time I heard it I immediately thought it might be the AC and turned it off and the noise quits. It's more of an audible vibration rather than a squeal. I can hear mine by the passenger side when I'm out of the car too.
     
  14. Jul 17, 2010 at 1:31 PM
    #14
    Fortech

    Fortech Well-Known Member

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    Pink fan clutch is not an indication of tow package. Most (all?) Tacoma's have a pink fan clutch.

    I have this exact same problem and only noticed it for the first time this week. Turning off the AC or reving the engine slightly above idle makes it go away. An audible vibration is a very good description of the noise I hear.
     
  15. Jul 17, 2010 at 1:43 PM
    #15
    joes06tacoma

    joes06tacoma Well-Known Member

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  16. Jul 17, 2010 at 7:16 PM
    #16
    ItalynStylion

    ItalynStylion Sounds Gooooood

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    ^Cross post/quoting from the thread he was talking about. I'll check my Taco and see if that's the same problem. What bolt is it? Is it obvious?

     
  17. Jul 17, 2010 at 9:22 PM
    #17
    joes06tacoma

    joes06tacoma Well-Known Member

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    It was the top bolt holding the alternator to it's mounting bracket. It's easy to see from under the hood, but I had to have just the right lighting on it to see that the washer was spinning.

    The noise was almost like a couple of plastic gears grinding.
     
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