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Thread: How To Tighten Fan Belt

  1. #1
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    Post How To Tighten Fan Belt

    My problem: There's a quick (1-3 second) squeel from the belt when I start the Jeep (4.0 2000 TJ) when it's cold.

    My diagnosis: The fan belt probably needs to be tightened. There is at least 1/2" play in it at one of the longer gaps.

    So, how do I go about tightening the fan belt? Seems like most posts I've read in the archive simply say, "Tighten the fan belt." Anyone care to elaborate on this? I guess if this doesn't work I'll try some belt dressing, but I'd like to do this first.

    Thanks for any help,
    Brian

    ------------------
    2000 TJ - 30x10.50 TSL's, Skid plates and a big bag of recovery gear.
    Just Jeeps Club of Cincinnati
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  2. #2
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    BTT before I go to bed for the night...

  3. #3

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    Not sure about the 2000, but on my '98 you have to loosen the center bolt on the idler pulley (near the power steering pump), and there is a long bolt that raises/lowers the pulley (look near the top of the power steering pump bracket). Once the belt is snug, tighten the center bolt on the idler.
    1998 TJ, 4.0, 5-speed
    D44/HP D30, 4.88s and Detroits, Tera 4:1 and 2-Low, 35's
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  4. #4

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    1/2" of play over a one of the longer distance should be about right. i'd just try some belt dressing. i don't think the belt is loose.
    '93 YJ SOA and some other stuff.

  5. #5
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    Thanks for the responses, I'll try them as soon as I can. BTT for now.

  6. #6
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    Try to avoid belt dressing if at all possible.

    ------------------
    92 yj 4o, 3.5 superlift
    Michael

    92 yj, 4o, 3.5 superlift,

  7. #7
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    <font face="Verdana, Arial" size="2">Originally posted by DanB98TJ:
    Not sure about the 2000, but on my '98 you have to loosen the center bolt on the idler pulley (near the power steering pump), and there is a long bolt that raises/lowers the pulley (look near the top of the power steering pump bracket). Once the belt is snug, tighten the center bolt on the idler.</font>
    Thanks for the info. Is the idler pulley in between the alternator and the power steering pump, or in between the power steering pump and radiator pulley?

  8. #8
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    Cool

    <font face="Verdana, Arial" size="2">Originally posted by azjeeper:
    Try to avoid belt dressing if at all possible.

    </font>
    agreed.........try this instead......auto part stores sell these small folded self adhesive backed doohickeys...[technical term there].....that are basically sandpaper........ they stick on the fan belt.....then start the engine, run for whatever time the directions indicate and remove.......and presto.........clean pulleys with grippy surfaces that don't squeal............


  9. #9

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    <font face="Verdana, Arial" size="2">Originally posted by CheaseMuddin:
    Thanks for the info. Is the idler pulley in between the alternator and the power steering pump, or in between the power steering pump and radiator pulley?</font>
    On mine, it's below the power steering pulley. Look on the power steering pump bracket for a long slot - the idler pulley slides up and down to adjust the belt. Once you see that, you'll know you have the right one.
    1998 TJ, 4.0, 5-speed
    D44/HP D30, 4.88s and Detroits, Tera 4:1 and 2-Low, 35's
    Will work for Jeep parts

    My Pics

  10. #10
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    CheaseMuddin, you can't adjust your belt. Look under your alternator. You should see a spring loaded idler pulley sitting there. That's your automatic belt tensioner.



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  11. #11
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    Brad, Thanks for the pic. I guess I'll try some belt dressing or the "sticky thing" since I can't tighten the belt. There's not a chance that the automatic belt tensioner could be malfunction is there?

    [This message has been edited by CheaseMuddin (edited 05-02-2001).]

  12. #12
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    Anything is possible I guess. Stick a ratchet on the tensioner and see if you can move it. You need to learn how to change the belt anyhow.



    ------------------
    '97 TJ-7 with lots of goodies
    http://www.dehesa4x4.com/bkilby

    http://www.onboardair.com

    http://www.kilbyenterprises.com
    2004 Khaki/Green Hemi powered Unlimited
    2005 Silver Unlimited wishing it had a Hemi

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