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tensioner pulley

This is a discussion on tensioner pulley within the External Engine forums, part of the LSx Technical Help Section category; Hey guys, I just finished installing my new 408 in my SS, it's not tuned yet, but I've been trying ...

  1. #1
    Junior Member
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    98 SS

    tensioner pulley

    Hey guys,
    I just finished installing my new 408 in my SS, it's not tuned yet, but I've been trying to put a couple miles on it first. My car keeps throwing the main belt. The first time it happened when I downshifted and got on it a little bit. I put a new belt on the car and now it happened again while just backing up. The belt looks like it tracks straight and all of the pulleys look true. The only thing I can think is that my tensioner pulley might be worn out (33K miles) and can't handle the torque of the new motor? Is this possible? What do you guys think and what do you suggest? Thanks for your help.

    Jeff

  2. #2
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    black
    2000 camaro ss

    my idler pulley below the a/c compressor was bad causing my belt to fly off. i've got 44k on mine.

  3. #3
    Likes twisty roads bene's Avatar
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    Light Pewter Metallic
    2K Camaro Z28

    You can get an adjustable tensioner pulley from Katech.

  4. #4
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    when my wife's car was doing that, i noticed the tensioner arm would pivot sideways (longitude or front to back of car).

  5. #5
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    2000 Camaro SS

    Quote Originally Posted by mrr23 View Post
    when my wife's car was doing that, i noticed the tensioner arm would pivot sideways (longitude or front to back of car).
    +1

    When it happened to me, I was making a 1/4 mile pass. Went to pull off the return road and didn't have power steering, looked down and saw engine temp rising fast. I coasted back to the pits to find the belt laying on the cooler lines undamaged. Put the belt back on and spectated for the rest of the night so I could drive home.

  6. #6
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    Just buy A Katech adjustable tensioner and be done with it. It solved all my belt issues.

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