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Belt tensioner specs?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by MGH-PA, Nov 19, 2009.

  1. Nov 19, 2009 at 12:14 PM
    #1
    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Ok, before I go ripping idler pulleys out this weekend, I want to make sure the squeal I'm hearing isn't the tension not being quite right. Is there a torque spec on that 14mm bolt for the tensioner or do you just go by physical play in the belt?
     
  2. Nov 19, 2009 at 12:19 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    No torque value I know of. The tensioner keeps the belt at the propper tension via a built in spring.
     
  3. Nov 19, 2009 at 12:26 PM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Alright. Now to figure out which pulley is bad:cool:
     
  4. Nov 19, 2009 at 12:27 PM
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    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    You only have 1 tensioner pully. Thats usually the one that goes bad.
     
  5. Nov 20, 2009 at 4:32 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    I don't think it's the tensioner. I was referring to the three idler pulleys.

    It's odd. The truck squeals slightly when I first start, but not like it did before the belt was replaced. Before the belt was replaced, it squeaked on cold or wet starts, and would only last for about 30-40seconds. Now it starts again on colder mornings (not so much wet days unless it's cold), and squeals usually only during acceleration and lasts much longer (ususally about the first 5 minutes of the drive).

    I can't pinpoint the source no matter how hard I try. The noise isn't getting worse either. Does that really sound like a pulley, or is my belt (non OEM) already garbage again?
     
  6. Nov 20, 2009 at 4:49 AM
    #6
    MGH-PA

    MGH-PA [OP] Well-Known Member

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    September 12 was the last day I changed my oil (~2,000 miles ago). The belt was replaced a month before that. This problem started I would say about a month ago.
     
  7. Nov 20, 2009 at 5:23 AM
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    Asgard

    Asgard Well-Known Member

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    I have a bad u joint and it squeals like a bad pulley or belt. Mine is accompanied by vibration but I was talking to someone who recently changed theirs on their '05 and they said they had the noise but no vibration.
     
  8. Nov 20, 2009 at 5:43 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Well I know the u-joints are good, and I've definitely isolated the noise to the front of the engine, I just don't know whether it's the belt or pulleys (and which one).

    Chris (or anyone else), should I be able to test these pulleys out with the belt of to see if they're bad (spin them by hand, and if they stick or don't spin smoothly, I can assume they're going bad)?
     
  9. Nov 20, 2009 at 5:49 AM
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    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    You can try to localize the squeak by useign a stethescope, but you need to be VERY carfull with the engne running, and use one long enough for use in listening to pullies. You need to put it on the pully shaft, or the item you are checking, ie, alternator, powersteering, etc..
     
  10. Nov 20, 2009 at 6:03 AM
    #10
    Rhino8541

    Rhino8541 I like ze best!

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    Anyone done a write up on changing the belt pulleys? I've had several replaced on two separate occasions by the dealers. I can't imagine they are going to do many more under warranty, so I'm gonna have to start doing them myself I think

    Also, can't you take the belt off, and spin the pulley's by hand to hear them individually for squeaking?
     
  11. Nov 20, 2009 at 7:16 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    That's what I'm wondering.
     
  12. Nov 20, 2009 at 7:29 AM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Many times they wont squeak without a tenson on them...
     
  13. Nov 20, 2009 at 7:55 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Great. I thought about the stethoscope idea, but like you said, I'm not too keen on jamming that thing in there.

    Do pulleys that are going bad get progressively worse over time? Mine haven't gotten any louder or any longer in duration which leads me to believe it MIGHT be some dirt/grease on the belt. I might pull the belt and wash it in soapy water.
     
  14. Nov 20, 2009 at 7:56 AM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    They do tend to get worse, but it depends on the environment in which you drive as to how fast they go bad.
     
  15. Nov 20, 2009 at 8:04 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Ok, so other than a stethoscope, there's really no way to pinpoint which pulley is bad? Because honestly, when it was finally squeaking on startup yesterday with NO acceleration, I got out of the truck, popped the hood, and listened. I could NOT even pick a side of the belt system as to where the noise was originating. This is going to be fun.
     
  16. Nov 20, 2009 at 8:06 AM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I use an 18" long peice of 1" dia. steel pipe. I place the pipe on the item (alternator, PS pump, etc), and listen that way. BUT....yes.....Thats about the only way to track it down.
     
  17. Nov 20, 2009 at 8:07 AM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    If you have an IR thermometer, with the engine off, you might be able to see wich pully is more warm (indicating more friction), but Im not sure how accurate that would be on a pully that is just squeeking.
     
  18. Nov 20, 2009 at 8:17 AM
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    MGH-PA

    MGH-PA [OP] Well-Known Member

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    Sounds good. I think I can scrounge up something.
     
  19. Nov 24, 2009 at 6:55 PM
    #19
    eyball

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    any luck on this one? My 2005 is doing the same thing. I am on my second belt replacement and the last new belt OEM lasted for about 4 months before the noise came back. Right now its only there when its wet out. I know its the belt as I rubbed some sidewalk chalk on the inside of the belt today before I left for work (with engine running-very careful) and the noise goes right away. It will be back in a day or so though.

    I am thinking about trying a Goodyear gatorback belt next. After that my guess is the belt tensioner is not applying enough tension although it seams pretty tight. You cant even turn the belt 90 degrees whcih I always thought meant it was tight enough.

    I never thought about oil getting on it. I attach a hose to the drain below the filter but maybe then I take the hose out when I am done its possible some oil dripped on the belt at that point. I would think the chalk on the belt would dry up that issue though.

    Who the heck knows but this sure is annoying!
     
  20. Nov 25, 2009 at 3:15 PM
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    dexterdog

    dexterdog My pee parts itch

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    You can take the belt off and see if there is any play in the pulleys by rocking them back and forth. Also, do any of them not spin freely? Is the water pump leaking out the seep hole?

    I am just going to take a stab in the dark and guess water pump but only because I have owned alot of GM vehicles in the past and they were notorious for failing water pumps and fuel pumps.
     
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