LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Belt squeaking like hell but only when cold

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Old Apr 24, 2010 | 02:24 PM
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Question Belt squeaking like hell but only when cold

Its pretty simple.If i start my car in the morning with the engin cold the belt squeal like crazy.
But the more miles i drove the more the squealing reduce and finally after maybe 15mins no more noise,everything like normal.

If i let the car cool down and start it back in maybe a couple of hours the damn noise is back for another 15min.

So what can i do to solve this...And by the way already try some new idler and tensionner pulley without succes.Alt is brand new,the ps pump is brand new and the spray stuff didnt work work at all.

I tried the old mechanic tricks by dropping some drop of water directly on the belt and it stop squealing for a couple of seconde(if it stop the belt is the problem,if not the problem is elsewhere)

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Old Apr 24, 2010 | 03:09 PM
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take the belt out and check if it has any cracks on the ribs.
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Old Apr 24, 2010 | 03:18 PM
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Originally Posted by monster81
take the belt out and check if it has any cracks on the ribs.
Already been done and there is no crack.I also took the time to clean it since the spray stuff didnt work.
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Old Apr 24, 2010 | 03:42 PM
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ok then, take a look at ur damper pully, it might have dirt or pieces of the old belt stuck in the groves and that might help the belt slip while turning and cause the squeaking noise
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Old Apr 24, 2010 | 03:51 PM
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U/D pulley?
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Old Apr 24, 2010 | 05:47 PM
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Originally Posted by SS RRR
U/D pulley?
Yes:
ASP 23% underdive
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Old Apr 24, 2010 | 05:58 PM
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old trick is to run sand paper on your pulley wheels to ruff them up some what....
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Old Apr 24, 2010 | 06:37 PM
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Originally Posted by always faster
Yes:
ASP 23% underdive
Your belt is probably too long then. What size are you running?
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Old Apr 25, 2010 | 09:59 PM
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Originally Posted by suicidal racing
old trick is to run sand paper on your pulley wheels to ruff them up some what....
Wich grid for the sand paper

Originally Posted by SS RRR
Your belt is probably too long then. What size are you running?
Im running a alt relocation kit(that keep power steering) so im not running a stock belt...Dont have the size for now because i lost it(break) while i was doing some test.I tighten the tensionner to the max to see if the squealing would go away.For this test the strap was so tight i could have played guitar on it soo i dont think that it was too long .

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Old Apr 25, 2010 | 10:09 PM
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any probley 80 or 150 would be best..i wouldnt use a 1500 or so..ive used 80-300 before i think..all your doing is ruffing up the surface to give it more bite.
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Old Apr 25, 2010 | 10:22 PM
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man you stay in NY its may be cold and hard in the morning on start up and than gets some heat on it that eases out....j/k
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Old Apr 29, 2010 | 08:35 AM
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Just a little follow up on this.

I will take some measurement with a straight edge and see if there is some problem of alignement with the pulley tomorrow morning.

I also did some test today.I put a new belt on and the squeal has disapear...but for how long...
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Old Apr 29, 2010 | 09:25 AM
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I was gonna say you need a new belt...but as you discovered by putting the belt on, that solved the problem. The issue is that belts are now made from a different material and you can't just look at them to detect if it's old. That is unless it's just frayed up worn out. But anyway, if you go on Gates website, there is a link for a free measuring tool that will tell you if your belts are worn out. It basically is a "go / no go" gauge that measures the depth of the ridges in the belt. You lay it in and if it sticks above the ridges, the belt is stilll good. If it is even, or sits below the ridges, then it's belt replacement time.
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Old Apr 29, 2010 | 09:29 AM
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Originally Posted by thehammer69
I was gonna say you need a new belt...but as you discovered by putting the belt on, that solved the problem. The issue is that belts are now made from a different material and you can't just look at them to detect if it's old. That is unless it's just frayed up worn out. But anyway, if you go on Gates website, there is a link for a free measuring tool that will tell you if your belts are worn out. It basically is a "go / no go" gauge that measures the depth of the ridges in the belt. You lay it in and if it sticks above the ridges, the belt is stilll good. If it is even, or sits below the ridges, then it's belt replacement time.
Good info, i ll check that with the old belt

Just for the info my belt was only 200 miles old
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Old Apr 29, 2010 | 09:31 AM
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Hear is the link describing the new EPDM belts. The link to the free tool in on the right.

http://www.gatesprograms.com/beltwear
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Old Apr 29, 2010 | 12:52 PM
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Sorry to threadjack, but I too, am having this problem. I have a March Power & Amp pulley kit and got the required belt for that size. I tried new belts and it still squeaks. The squeaking sound seems to get louder as you accelerate but it will be done by around 15 minutes. I really want to get rid of this because it is so annoying!

A friend thinks it might be the power steering or ac condensor. What do you guys think?
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Old May 1, 2010 | 05:14 PM
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Originally Posted by marc97taws6
Sorry to threadjack, but I too, am having this problem. I have a March Power & Amp pulley kit and got the required belt for that size. I tried new belts and it still squeaks. The squeaking sound seems to get louder as you accelerate but it will be done by around 15 minutes. I really want to get rid of this because it is so annoying!

A friend thinks it might be the power steering or ac condensor. What do you guys think?
The power steering got a non rib pulley so its not the problem.

For the rest i took some measurment and found that my alternator is .070 inch offset more in front than my crank pulley.

Also my new manual tensionner is .180 inch(near 3/16 inch) offset more in front than my damper crank pulley.

I ll put a shim behind my crank pulley(.070inch) and i ll shave my tensionner by .110inch.
Im happy to have found what was the trouble.

Last edited by always faster; May 2, 2010 at 02:07 PM.
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Old May 2, 2010 | 08:02 AM
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who made the relocation kit?
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