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3.4L AC Belt Replacement?

Discussion in '1st Gen. Tacomas (1995-2004)' started by stinger86, Jul 5, 2020.

  1. Jul 5, 2020 at 4:52 PM
    #1
    stinger86

    stinger86 [OP] Well-Known Member

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    Just wanted to confirm the diagnosis, hearing a squeal/squeak that can be eliminated by turn off the AC. Other than replacing the belt anything it could be/I should check.

    What all is involved in just doing the AC Belt? I know Timmy has a video on doing ALL of the belts but don't really want to/need to replace all the belts yet to my knowledge.
     
  2. Jul 5, 2020 at 6:21 PM
    #2
    yourrealdad

    yourrealdad Well-Known Member

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    I am pretty sure the AC belt runs all the time regardless of if the AC is on? You could check my assumptions by opening the hood and looking. It is the second belt in the middle. That sounds more like something with the AC controls bearings etc that I don’t know about.

    Replacing it is easy, and you shouldn’t have to remove the other belts cause it is accessed from the bottom without going over the fan.
     
    Last edited: Jul 5, 2020
    stinger86 [OP] likes this.
  3. Jul 5, 2020 at 6:36 PM
    #3
    Abeyancer

    Abeyancer Not so secret, secret van guy

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    Your AC belt should be turning all the time the engine is running.. if the squeal stops when you turn the AC on, I would think it's the bearing in the pulley that's apart of the clutch.

    Take the belt off and spin the AC clutch, use the backwoods screwdriver stethoscope method to see if you hear or feel anything other than butter when you spin it slow
     
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  4. Jul 5, 2020 at 7:14 PM
    #4
    DiverDan

    DiverDan Member

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    With engine running and AC switched on, try shooting some soapy water on the underside of the belt where it makes contact with the pulley. If squeal goes away it could be that your belt is loose, old, polished shiny and slipping under load.

    edit - After some thought, might be better/safer to have engine not running before spraying soapy water although I've never had a problem as earlier described.
     
    stinger86 [OP] likes this.
  5. Jul 5, 2020 at 7:20 PM
    #5
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    More than likely it’s the AC idler pulley,
    These pulleys then to crap out regularly,

    Put the AC on and put the automotive stethoscope on the idler pulley under the truck
     
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  6. Jul 5, 2020 at 9:39 PM
    #6
    stinger86

    stinger86 [OP] Well-Known Member

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  7. Jul 5, 2020 at 9:44 PM
    #7
    stinger86

    stinger86 [OP] Well-Known Member

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    Squeal stops when the AC is turned off, starts when turned on but same difference. Sounds like I have a plan of attack.

    As always thanks to everyone here. You are an amazing group and willing to help out idiots like me!
     
  8. Jul 5, 2020 at 10:22 PM
    #8
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    Money is on the AC idler pulley and that’s easy to replace
     
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  9. Jul 5, 2020 at 11:08 PM
    #9
    Abeyancer

    Abeyancer Not so secret, secret van guy

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    @1997tacomav6 has got it, if I wasn't a dummy and misread your original post I would said the same thing I swear :D

    Hope you knock it out quick and easy!
     
    1997tacomav6 likes this.
  10. Jul 6, 2020 at 2:13 AM
    #10
    Wyoming09

    Wyoming09 Well-Known Member

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    Just asking you have ruled out that it is not the blower motor ??

    Noises can be difficult to pin down
     
  11. Jul 6, 2020 at 6:14 PM
    #11
    stinger86

    stinger86 [OP] Well-Known Member

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    I have not ruled out the blower motor. It does sound like belt squeal but to your point sounds are hard to lock down. Figure they the pulley first since it seems relatively easy.
     
  12. Jul 7, 2020 at 5:23 PM
    #12
    LSUdude

    LSUdude Member

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    Mine does the same and the AC isnt cold at all....any idea
     

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