I have a 2k with 77,000 miles. Something connected the the belt system is squeking. I sprayed some belt lube on the belt and the noise did not go away. I replaced the belt and the tensioner about a year ago. I am afraid a bearing on one of the pullys is going out. Has anyone replaced any of the pulleys? I looked like an ordeal to get to some of them, I might have to pull the air cleaner and steering rack. How can I tell which pully it is without getting caught in the belt?

 

You have two belt systems on your car. One is the drive belt system, the other is the air conditioner belt system.
The drive belt system consists of the serpentine belt,the power steering pump, alternator/gen, water pump, harmonic balancer, idler pulley,belt auto tensioner pulley.
The AC belt system consists of the compressor, harmonic balancer,idler pulley, belt auto tensioner pulley.
First thing you need to do is isolate which system is squeaking. this can be done by releasing tension on the drive belt tensioner and removing the serp belt. This is the outboard belt of the two belt systems..if the squeak goes away, then it is the belt or a component of the drive system.
If the squeak is still there, then it is a component of the ac belt system.
to verify this release the belt tension from the tensioner and remove the belt. if the squeak goes away, then it is a component of the ac belt system..
A common problem is the belt tensioner on either system.. but verifying which system is at fault is the proper procedure.
You could replace both belts, but you may still have the squeak. So if you want to find the culprit, isolate the system, then spray the belt of the offending system and see if the squeak goes away. Try to stay away from the idler and tensioner while spaying..
I find that belt dressing may be good to identify a belt problem, but it is a temporary fix at best..
The real problem has been the tensioner and the idler.. both of these components have a sealed bearing which has been know to dry up or redirect the grease away from the bearing, thus causing the squeak.
If you find that a belt change does not correct the problem, then a change of both the idler and tensioner pulley is in order. If you just change the idler or the tensioner alone, it will cause the other component to go bad in a month or so. This has been the case with many members..There was a change made to the dusts seals to help correct this problem in newer C5's.
Lots of tensioner and idler pulleys have been identified as a problem.. and it can effect either system. One is not more prevalent than the other. So find out which system is squeaking first, in the drive belt system, it could also be the bearing of the alternator, power steering pump, or water pump too, but these are less probable.
I hope this makes things alittle clearer

ET

 

just had mine replaced the crank pully went bad luckly covered on the extended warranty no squek just wobbel took out the front crank seal

 

johnny, tell me about this 'wobbel' I think I have one pully that has some wobble to it.

Evil-Twin-Thanks for the info. I have to wake up early and try this before work because it only does it in the morning. I have not done this in the morning because I know I will be late for work. I have not ever replaced the AC belt, that might be the problem, I sure as hell hope so.