Weird noise

Discussion in 'Engine & Drivetrain' started by Derrick Rucker, Jan 5, 2017.

  1. Derrick Rucker

    Derrick Rucker Well-Known Member

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    Hey guys so 2 days ago my Trailblazer started making a weird noise it almost sounds like my rotor is rubbing on something would be the best way to describe it but it's coming from the engine and when I pop the hood it's coming right from the power steering pulley but I don't have any check engine lights or any trouble with anything just this awful noise anyone experience this or had this trouble?
     
  2. AtlWrk

    AtlWrk Well-Known Member

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    Very common problem: tensioner pulley bearing.

    Take the belt off and spin the pulley by hand. It should rotate smoothly and freely. Any grittiness or draggy feeling indicates the bearing is shot. Fortunately replacements are easy to come by and it's literally a single bolt to swap it out. Might as well check the idler pulley too while you're at it (under the alternator).
     
  3. Derrick Rucker

    Derrick Rucker Well-Known Member

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    Should I turn it the way it's supposed to go to test it or the opposite way
     
  4. Sparky

    Sparky Moderator

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    Doesn't matter.
     
  5. Mooseman

    Mooseman Moderator

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    Spin each idler in both directions and listen for any kind of noise or feel roughness. If in doubt, replace it.
     
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  6. Derrick Rucker

    Derrick Rucker Well-Known Member

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    So am I replacing the whole pulley or just the bearing in it sorry I've never had to mess with them before
     
  7. Wooluf1952

    Wooluf1952 Well-Known Member

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    IIRC, it's easiest to just change the assembly. I'm not sure if you can even buy just the bearing.
     
  8. xavierny25

    xavierny25 Platinum Supporter

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    I'd inspect them all since your going to have the belt off. Definitely check the water pump pulley ,idler pulley,tension pulley and so on. The idler and tensioner are pretty easy and not expensive at all. Bolt off,put new in place,align,bolt on and tork.
     
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  9. smt 59

    smt 59 Well-Known Member

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    Full assembly replacement as you cannot get just the bearing.
     
  10. MRRSM

    MRRSM Gold Supporter

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  11. jsheahawk

    jsheahawk Well-Known Member

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    I'm sure you could part the bearing, but it isn't worth it. Replace the whole assembly.
     
  12. djthumper

    djthumper Administrator

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    I just replaced the pulley
     
  13. Derrick Rucker

    Derrick Rucker Well-Known Member

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    Thanks guys for all your help I'm going to fix this, this weekend
     

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