Found my noise, it was the idler pulley - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-17-2005, 05:23 PM   #1
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Default Found my noise, it was the idler pulley

I pulled the pulley off and there is a seal on both sides of the bearing, I popped the seal off and cleaned and repacked it with disc brake grease and its quiet as a mouse now. How long it will last I have no clue ! :P
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Old 11-17-2005, 05:28 PM   #2
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My idler pulley makes noise too but only when it is cold out. How hard was this procedure? Do I need any special tools? Also is the idler pulley the same as the idle tensioner pulley (i think thats what its called)?
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Old 11-17-2005, 06:07 PM   #3
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I would like to know that same question. I am having problems with mine, and the garage keeps on putting new stuff on there, but it stil wont fix it. New water pump and idler tension pulley so far, and it still makes that noise
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Old 11-17-2005, 06:58 PM   #4
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Default Cake !

Pc of cake. Its a left hand bolt goes right thru the center, remove the bolt with a socket and rachet not too tough to do , then just let the belt lay to the side and remove the bolt and the pulley falls off in your hand. On both sides around the bearing is a seal, take a pocket knife point and pop out the seal on both sides. Clean and spray it real well with WD40 and blow it dry. Then use some good Hi temp wheel bearing grese and pack it in on both sides then wipe the exces and press the seal back in with your thumbs. Re install the wheel remember its a left thread nd put the belt back on and listen to the quiet !!
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Old 11-17-2005, 07:54 PM   #5
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Default pulley

this could be my problem on my 90.
The idler pulley started to squeal then ate the belt then took out the crank sensor.
Didn't know the pulley is removeable.
Does GM stock just the pully or do they make you buy the whole thing?
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Old 11-17-2005, 08:27 PM   #6
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Local NAPA sells the whole arm with pulley for 65.00 but I just removed the pulley repacked the bearing and reassembled
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Old 11-17-2005, 08:29 PM   #7
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You can buy just the pulley itself for alot cheaper.
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Old 11-17-2005, 08:44 PM   #8
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I just priced the pulley at autozone.com for 19.99$. This is for a 92 bonne se, the brand is "Ac Parts". There is also a "Dayco" for 21.99$.
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Old 11-17-2005, 08:52 PM   #9
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I just tried to take my pulley off. Couldnt do it. If its a left hand bolt does that mean righty loosey, lefty tighty (sorry for the insanely dumb question)? I gave up because its very cold in Rhode Island tonight.
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Old 11-17-2005, 08:52 PM   #10
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I believe the first one is plastic, the Dayco may be aluminum (much preferred).
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