Help! Replacing belt - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 09-16-2010, 11:23 AM
bama_whodat bama_whodat is offline
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Help! Replacing belt

I have an 05' Trailblazer that had the belt break. I tried to replace it yesterday by loosening the tensioner and slipping the new belt on. Once I put the new belt on and tightened the tensioner the belt is not completely tight and it's squealing extremely loud. I cannot get it any tighter. What am I doing wrong?
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  #2  
Old 09-16-2010, 11:32 AM
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Clockman06LT Clockman06LT is offline
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May have the wrong size belt:

http://forums.trailvoy.com/showthrea...ight=belt+size

My
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Old 09-16-2010, 11:36 AM
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mubai mubai is offline
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What do you mean you loosened the tensioner?

I put an empty ratchet in there and pulled the tensioner to give me some slack while I removed the belt. I wrapped the new belt around the tensioner and the other pulleys, then I had a buddy put the ratchet in the tensioner to give me some slack to put the belt around the alternator. I never loosened the tensioner.

Also, maybe you got the wrong size belt???
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Old 09-16-2010, 11:38 AM
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this could help some

http://forums.trailvoy.com/showthrea...erpentine+belt
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  #5  
Old 09-16-2010, 11:39 AM
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get_over_it get_over_it is offline
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I believe you got the wrong belt there are a couple of configurations resulting in different belt sizes. If can remember right it is the alternator that has two sizes of pulleys resulting in two belt sizes!

I cant remember the sizes but I did read it in a thread here, so maybe someone else will have the correct size for you!
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Old 09-16-2010, 11:41 AM
bama_whodat bama_whodat is offline
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help

I loosened the tensioner pulley bolt until it let loose the old belt. Then I put the new one on and tightened the tensioner back in place making the belt as tight as I could make it. There is just a bit of slack in the belt though and it's making a terrible squealing noise. I didn't mess with the idler pulley (square bolt without a big enough socket). I verified that I have the correct belt though, so that's not it.
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Old 09-16-2010, 11:48 AM
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Start over again and check to make sure you wrapped it correctly. Also, you don't need to remove any bolts, that may be the mistake. I can't understand you got the tensioner pulley back in place with the belt on?

Take the belt off by loosening the tensioner pulley as shown in the pic below. Then retighten the tensioner pulley bolt, make sure it sits perfectly. Check the torque specs for the bolt. Then do as the instructions say, you'll get it, stay with it:

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Old 09-16-2010, 12:01 PM
bama_whodat bama_whodat is offline
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help

The tensioner is set kinda low to where it's near the large pulley at the very bottom (extremely close actually), but I can't get the tensioner pulley any higher with the belt on it. I didn't take the tensioner off, I just loosened the bolt to where I could move the pulley. Do I need to mess with the idler pulley instead? I know for a fact that I have the belt on in the correct pattern.
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Old 09-16-2010, 12:07 PM
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You have to use a breaker bar or a ratchet to get it in the square "hole" to move it to get the belt off. You need to get the belt off. Then you have to go and retighten the tensioner pulley bolt it's not in the right position.

If you don't remove the belt and retighten the tensioner pulley there's nothing we can do to help.
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Old 09-16-2010, 12:08 PM
bama_whodat bama_whodat is offline
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ohhhh

I think I messed up by loosening the bolt and moving the pulley out of place... Crap!
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