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Serpentine Belt & Pulley Job - Which Pulleys Should I Be Replacing?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by awoit, Jan 5, 2023.

  1. Jan 5, 2023 at 12:12 PM
    #1
    awoit

    awoit [OP] Well-Known Member

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    First time I've had the serpentine belt off on my 2008 tacoma and want opinions on which pulleys need replacement. Fairly certain pulley in Video D needs replacing but what about the others? Also, is this an OEM part I should get or is aftermarket just as good?

    Video A

    Video B

    Video C

    Video D

    Diagram with pulley locations noted.
     
    DaTacoNL likes this.
  2. Jan 5, 2023 at 12:34 PM
    #2
    TnShooter

    TnShooter The TacomaWorld Stray

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    A is on it’s way out.
    B is just about done for
    And D is dead.

    If you are on a budget, you might get by with just doing B and D.
     
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  3. Jan 5, 2023 at 12:40 PM
    #3
    awoit

    awoit [OP] Well-Known Member

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    No budget issues, my main concern is ordering the right parts and getting them ASAP (this is my daily).

    Was able to find the three pulleys - I've seen videos where they arrive but without replacement hardware. I'm assuming the best action is to go to the hardware store and match them up as it's likely best to replace that as well (washer, etc.,)
     
    Last edited: Jan 5, 2023
  4. Jan 5, 2023 at 1:13 PM
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    TnShooter

    TnShooter The TacomaWorld Stray

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    One is a double roller bearing.
    They aren’t “common” but can be bought.
    You might get lucky and find them locally.

    https://www.tacomaworld.com/threads...arings-in-the-idler-tensioner-pulleys.480961/
     
    awoit[QUOTED][OP] likes this.
  5. Jan 5, 2023 at 1:33 PM
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    Flo_TRD07

    Flo_TRD07 Well-Known Member

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    I replaced all three pulleys and used my old hardware. Not sure the condition of how your hardware will be, but mine were in really good shape still. Put a couple thousand miles on them since and had no issues BUT if you decide the hardware needs replacing then by all means go with your gut!
     
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  6. Jan 5, 2023 at 1:41 PM
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    TnShooter

    TnShooter The TacomaWorld Stray

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    And remember, the tensioner pulley is LEFT hand thread.
    You have 2 options, replace the pulley, or replace the whole tensioner.

    The whole tensioner assemblies is a bear to replace. You have remove the alternator, the AC compressor and the compressor mount. Might as well pull the front left wheel off, you’ll be going through there to to some of the bolts.
     
  7. Jan 5, 2023 at 1:42 PM
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    10thMTNgrunt

    10thMTNgrunt This is the way, step inside.

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    So is it the more noise they make when you spin them the indicating factor of needing replacement? That’s what I got from watching his videos and your assessment.
    Will be doing this job myself in the coming weeks, thanks!
     
  8. Jan 5, 2023 at 1:44 PM
    #8
    awoit

    awoit [OP] Well-Known Member

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    I'm looking at purchasing this for the tensioner pulley but plan on just swapping the pulley... Any reason why a person would replace the whole tensioner/unit when it's just the pulley that needs attention?
     
  9. Jan 5, 2023 at 2:34 PM
    #9
    greenEFSI

    greenEFSI TacoSupreme____

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    No point in buying that whole thing, just get this nachi bearing and swap it out onto the same original pulley. You only need to change the whole tensioner when the spring is bad on your old one and no longer holds tension in the proper range.
     
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  10. Jan 5, 2023 at 3:13 PM
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    TnShooter

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    Basically, yes.
     
  11. Jan 5, 2023 at 3:45 PM
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    DoubleB

    DoubleB Well-Known Member

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    Just did this a few weeks ago to my ‘06 PreRunner 4.0. This is what I used for the parts and torque specs. Got my parts off Amazon. I also replaced the alternator a few days later, it was making a ticking noise. That was an Autozone free replacement part.

    I put the front up on jack stands, pulled the skid plate, and did it all from underneath. Now super quiet.

    After I got it all off, the pully on the tensioner looks a lot like the 36174. If I was to do this again, I would just order a second 36174 pully for the tensioner and use the stock bolt and washer to install.



     
    Last edited: Jan 5, 2023
    Taco 422, cloudbnd, DaTacoNL and 2 others like this.
  12. Jan 6, 2023 at 12:29 AM
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    muddog321

    muddog321 Well-Known Member

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    Here is when I did them all as while in there why not get them all done.
    Used OEM parts. Post 7 gives part #s.
    Idler pulleys, tensioner, belt, and alternator replacement | Tacoma World

    You can look at McGeorge Toyota online and see all parts you need/want.
    Genuine Toyota Parts | McGeorge Toyota near Hanover

    Or find local dealers for pickup if you want faster parts.
    Toyota Parts and Accessories - Official Online Store

    The reason to do full tensioner assembly is spring gets weak and allows belt slip on full throttle (hear or smell when it happens).
    Have fun.
     
    Last edited: Jan 6, 2023
  13. Jan 6, 2023 at 7:06 AM
    #13
    Leomania

    Leomania Well-Known Member

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    This. As long as your tensioner is working fine, replacing just the bearing is pretty easy. Just be careful when pressing in the new one that you don’t put pressure on any part of it except the outside housing and you’ll be fine. The old bearing works great as an installation tool.
     
  14. Jan 6, 2023 at 6:52 PM
    #14
    Chuy

    Chuy Well-Known Member

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    If your pulleys are in good shape, I have a thread on how to replace the bearings in the pulleys, including the tensioner. Do not use pulley # 36174 to replace the tensioner pulley. There is a reason it’s crossed out in the diagram above - the pulley will fit, but, because the bearing is too wide, the pulley bolt loses about half thread engagement. Down the road, you may strip the threads out of the timing cover. It is not worth the risk.

    To test the bearings, rotate the pulley by hand. It should spin smoothly and freely. And there should be no side-to-side nor fore/aft movement, except for about 1mm fore/aft movement on the PS pulley. That appears to be normal or it could just be mine as it has always had that play, as have most of my other vehicles. The water pump bearing may be difficult to test as you would have to remove the fan clutch to isolate any play.

    https://www.tacomaworld.com/threads...arings-in-the-idler-tensioner-pulleys.480961/
     
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  15. Jan 11, 2023 at 5:49 PM
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    awoit

    awoit [OP] Well-Known Member

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    Hey DoubleB! Thanks for the references.

    Quick question: Did you install the pulleys exactly how they came, or did you use additional washers anywhere? I see some YouTube channels using additional washers on the 36173 (in-between the bolt and the race/insert that fits in the bearing). Not sure if it makes a big difference but curious if there is a best practice.. Or if it yeetz it skeetz.

    Cheers!
     
  16. Jan 11, 2023 at 8:19 PM
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    awoit

    awoit [OP] Well-Known Member

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    Thanks for that. I'd already ordered the pulley items but will definitely consider this for the next time!

    Question: I just replaced idler number one with the Gates pulley. Does it look like the inner diameter is spinning crooked? https://imgur.com/ymd5XQT

    Seems most noticeable around 7 o'clock area.
     
  17. Jan 11, 2023 at 8:39 PM
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    b_r_o

    b_r_o Beef jerky time

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    Looks fine to me
     
  18. Jan 11, 2023 at 10:57 PM
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    GilbertOz

    GilbertOz Driver

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    I see it also. Looks like the inside diameter of the stamped metal pulley shell is slightly out of round. The outside diameter of the shell does look properly round, that's easy to see in the bright reflection off the outer shell face. Very unlikely that it's the bearing itself.

    Any amount of "out of round" does cause some vibration & uneven loading on the bearing, the question is how much, and for how long the bearing can tolerate it.

    That might be the difference between a Toyota OEM part & the Gates replacement -- maybe the Gates pulley lasts 50 or 80K miles while the more perfectly-round Toyota original part goes to 120K or 150K?
     
  19. Jan 12, 2023 at 10:39 AM
    #19
    Chuy

    Chuy Well-Known Member

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    Agreed, that looks like a manufacturing defect on the face. Looking at the belt surface of the pulley using the timing cover as a focus point, the pulley spins true. It will be ok. If the oem pulleys look good, you can replace the bearings and use them as backup.
     
  20. Jan 12, 2023 at 6:23 PM
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    awoit

    awoit [OP] Well-Known Member

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    Any advice on whether or not I should add a washer on the 36173 like the one used with OEM, or just install with the small insert that it comes with?
     
    Last edited: Jan 12, 2023

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