Belt and/or pulley noise

Hi all,

I took my car into the shop a couple of weeks ago to fix a couple of oil leaks. The shop was honest and did a good job. In order to find the leaks, they had to clean almost everything in the engine really well. As a result, I have a let of belt/pulley noise now. I took it back in the next day and they sprayed a little bit of WD-40 on the pulley where the belt rides and the noise completely stopped. That only worked for a little while though and now the noise is back. I've used WD-40 on it myself and it clears up for about 30 minutes, but then the noise comes back.

The belts are fine. They have less than 12,000 miles on them and were checked out by the mechanic, along with the pulleys, and he said they were good.

I have scheduled to bring it back in to the shop next week, but it's really inconvenient for me. Is there something I can do myself to stop the noise permanently?

Thanks,

GT

First let me ask you what year the car is and whether or not it is equipped with a supercharger.
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Thanks for the response. Sorry, yes. It's a '02 Grand Prix GTP.

I forgot if the supercharged 3800 engines have one or two belts.. If there are two, isolate which one is sqeaking..

Most often, if you spray the belt with lubricant and the noise disappears, you need to replace the belt.. There are belt conditioners they sell to spray on, but they suck and don't work. I know the belt only has 12000 miles on it, but sometimes they just wear. Here are my suggestions..

1) replace the belt with an AC Delco brand.. this is what GM uses and what I only use.. never had a problem.

2) when u take the old belt off, make sure the pulleys are free of dirt and fluids..
you can try this first before buying a new belt actually.

3) make sure the idler pulley is not worn and make sure the mechanic didn't leave any bolts loose.

this is how I would start off....
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Just take the belts off and spin each pulley by hand. If they still have good sealed bearings, they will turn with no noise, but not keep spinning. Any of them that when you spin fast keep spinning for more than a second, the grease leaked out of the bearing.

Goodyear Gatorback belts are when I use (expecially on a supercharger) or else Dayco are good also and I think come with a warrenty (forget how long).

Replace the belt the cleaners (degreaser) eats rubber and prob took conditoning off the belt but remember they used degreaser it eats grease the bearings in the tensioner and idler are non greaseable so cleaner gets in them degreases them they dry out and it is metal metal high friction