Squeaking belt/Idler pulley
03-05-2010, 07:09 PM
#21
Well I just got a DEALER alternator bracket and a DEALER idler pulley that fit on the bracket.
the pulley rubs the bracket.
What
The
****
And if I tighten the pulley too much it wont spin. So now i have it on there. I'm debating on whether to start it up. Also got a $30 gatorback belt.
I guess im wondering how can DEALER OEM parts not be compatible with one another? BTW it rub with and without the dustjacket and washer.
the pulley rubs the bracket.
What
The
****
And if I tighten the pulley too much it wont spin. So now i have it on there. I'm debating on whether to start it up. Also got a $30 gatorback belt.
I guess im wondering how can DEALER OEM parts not be compatible with one another? BTW it rub with and without the dustjacket and washer.
if the parts dont work for you id take em back ASAP
03-05-2010, 07:38 PM
#23
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The TSB dated March 2000 lists the new part numbers for the idler pulley and alternator bracket, 12563326, 12563327. It was a mid 2000 change on the production line. The earlier pulley WONT fit on the later bracket. The pulley is the same size but the bearing is wider on the later one. The aftermarket is scarce on the different pulleys. You can find the early one easy,the later one, not so much. I had to special order DAYCO 89159 from pimp boys, 40$. The bearings in all the pulleys do not last forever, cheap insurance to replace all of them........... How do you repack the sealed bearings in these pulleys??????? 
03-05-2010, 07:39 PM
#24
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OK so did it stop squealing? A bit confused. If not make sure the belt isn't doing it. To check get some Irish spring soap and put it on the belt while it is running. Front and back. I had a squeal after I put my underdrive and new belt on and I couldn't figure it out. Buddy of mine brought out the soap and no more squeal.
05-14-2014, 09:33 AM
#26
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Same problem If the squealing continues, I'd like to start with the belt dressing strategy since it seems to be the easiest and cheapest way to start. What is the best belt dressing product to purchase from a place like O'Reilleys? What's the best strategy for applying it to a pulley? Thanks for any advice.
05-14-2014, 11:51 PM
#27
I picked up a concrete bolt kit which had the perfect size washer to use to space out the pulley from the replacement GM bracket. If you use the stock spacer, it will have the pulley rub the alternator bracket.
05-16-2014, 09:30 PM
#28
TECH Fanatic
If the squealing continues, I'd like to start with the belt dressing strategy since it seems to be the easiest and cheapest way to start. What is the best belt dressing product to purchase from a place like O'Reilleys? What's the best strategy for applying it to a pulley? Thanks for any advice.
05-20-2014, 01:27 AM
#30
Well I just got a DEALER alternator bracket and a DEALER idler pulley that fit on the bracket.
the pulley rubs the bracket.
What
The
****
And if I tighten the pulley too much it wont spin. So now i have it on there. I'm debating on whether to start it up. Also got a $30 gatorback belt.
I guess im wondering how can DEALER OEM parts not be compatible with one another? BTW it rub with and without the dustjacket and washer.
the pulley rubs the bracket.
What
The
****
And if I tighten the pulley too much it wont spin. So now i have it on there. I'm debating on whether to start it up. Also got a $30 gatorback belt.
I guess im wondering how can DEALER OEM parts not be compatible with one another? BTW it rub with and without the dustjacket and washer.
05-21-2014, 06:23 PM
#31
your belt might be looks take a string and put it around your pulley(new one) than mark it . Next take the same string and put it around the old pulley measure the distance and times that by pie 3.14 and thats what you need for belt length......my alternator pulley was deeper causing belt slippage across all pulleys making the squeak. Which I thought was coming from belt tensioner ...i replaced said tensioner an it still did it . I finnally got a belt 56.5 from autozone....fixed it all the squeaks gone
