Does anyone have a part number? I couldn't find it here.

I think it's squeaking bad. I replaced my main belt but it didn't help.

I think it's either the A/C idler pulley or the main belt tension(the one on the top right of the motor)

Thanks!

 

i am having the same problem, do you know where i can find a diagram of the ac belt, i cant seem to find the tensioner

 

Try this link from GM Parts Direct
http://www.partsvoice.com/ipc/images...6/00115688.tif

http://www.gmpartsdirect.com/partsvoice/frameset.cfm

 

The A/C idler and tensioner pulleys are down low, some people like to replace them from underneath. You need to remove the main serp. belt then go under for the other belt (A/C). The idler pulley can be done from the top. GM has an idler pulley (wheel) for about $22 each (Fred Beans) but they do not sell just a pulley for the tensioner arm - they only have the whole assembly ($86 @ FB). You can save some money by buying two (2) idler pulleys: 1. One to replace you old idler. 2. The other replaces the tensioner pulley (wheel) on the tensioner arm held on by one bolt, using the tensioner arm over again with the new pulley installed. The idler pulley and the tensioner pulley are exactly the same, they just don't tell you and make you buy the whole tensioner assembly - save some money. There are some old post covering the R&R for the A/C pulleys, maybe in archieve by now. Only three bolts plus the extra one for the pulley on the tensioner but it is a little tricky to get it off/back on - idler & tensioner & belt. I did this replacement 11K miles ago and it's still going strong. You'll swear the belt is too small (especially a new one), but it is done.

See this link for belt diagram: http://forums.corvetteforum.com/show...t=idler+pulley

Auto Zone Gatorback a/c belt #4040420 - $15.99 Gatorback Main Serp. belt #4060802
GM a/c belt #12569528 - $34.13
Many of us use the Gatorbacks, its a good belt.
GM part #12557334 for the pulleys (9.180) was $22.26 when I go them from Fred Beans.

You can only get the pulleys from GM, no aftermarket supplier.

 

Did my AC pully last summer from below.

 

Any problems getting the belt back on?
Any tips for the original thread poster above?
What did you replace w/new: 1 or 2 pulleys? Tensioner arm?

 

This link to a thread has a diagram in it a few post down.
http://forums.corvetteforum.com/show...idler+ pulley

 

I had the same problem with the noise .Took it to the dealer and after three days there and changing the belt and tensoner it ended up being the harmonic balancer

 

Seems like a common problem,, I had this problem as well. I took it the dealer they changed the belt and a few pulleys but still have that squel. Car is in storage now so I'll have to take it back in the spring. Good info in this thread,, I'll have to save it and pass it on to the dealer..

 

I replaced the AC tensioner. I didn't know about the Pully replacement then. I recall the tensioner was about 65 bucks from the local dealer. I have a friend with a repair shop, and he lets me use his lift after hours. It's cramped underneath (the steering mechanism is kind of in the way), and the belt was somewhat difficult to put back on, but it only took an hour or so to complete the job. I figured out which pulley it was by spraying a little WD-40 on one and then the other. The oil doesn't last very long but it let me know which pully bearing was going bad.

 

Mine squeaks too, but once the car has warmed up, and been driven a bit, it seems to quiet down.

 

Been there/done that - I won't be too long before it's all the time.
Good Luck.