Does this sound right to you?
http://www.youtube.com/watch?v=4HmMAyPdyDs

To see under the hood, check out this post:
bad-crank-pulley-harmonic-balancer?

 

I believe this is your third poll on this and many have recommended that you get it checked out. The only way to put this to rest and get the peace of mind you are seeking is have a competent Corvette mechanic look at it. Good luck.

 

My apologies for the repetitiveness, but the 1st post/poll wasn't working correctly (Nobody could VOTE), so I posted again. Then since I had a new video that I considered to be a separate issue from the main crank, I started a new thread. I just want to get as many opinions as possible as I'm due there first thing Monday morning.

Thanks everyone for your help!

 

i cant hear the squeak in your video, but take it from me, have it checked. The snout on my crank was destroyed and i needed a new crank. Pretty intensive fix.

 

What do you have cotton ***** in your ears?

That seems to be the overwhelming consensus, thank you for your comments!

Sorry to hear that. How long did it take? How did it happen?

 

If you cannot diagnose it, get it looked at by someone who can. It will be cheaper than fixing it later in all probability.

 

Does the rate of the squeak increase with light throttle application ? It sounds an awful lot like a bad tensioner pulley, Compressor pulley, or even an oily drive belt.

 

From your other thread on this topic...

Quote:
Originally Posted by SweetBlueZ51
I think this better sums up the noises I've been experiencing.

Does it sound like a problem to you?
http://www.youtube.com/watch?v=4HmMAyPdyDs

I posted here earlier and mentioned that other components of the system could be affected. A little more explanation here after hearing/watching the second video. Watching the idler arm move up and down due to the belt tention changing due to the pulley wobbling = constant wear of the belt tensioner arm (these things are designed to flex not be cycled every revolution of the engine) and early life-out of the pulley arm bearing (or whatever is allowing the arm to move). Belt alignment being "off" puts side-loads on anything that is rotating.

It sounds from the video that you definitely have something that is taking it's toll due to the dynamics of the belt system going through gyrations every rotation of the engine.

Look for something that is designed to adjust in the belt system but is being cycled every revolution of the engine. This is where I would look first. A well designed and well built engine should run like a swiss clock. Especially something as simple as a syrpentine belt system with pulleys and idlers.

 

There is a screeching noise when revved.

The water pump has been recently replaced as there was a leak under the car, so it could be partly or wholly related to a oily drive belt. If that is the culprit, could it just work itself out in time? Could the belt be cleaned, or would it be necessary to be replaced?

 

Its gonna be the drive belt most likely.... You can try to clean it but i wouldnt recommend it. Replace it with a brand new drive belt and clean and inspect all the pulleys. Easy and cheap. However, keep in mind theres still a chance that the problem might be a bad pulley. Its just really hard to tell without looking at the car in person.

 

Drive belt most likely.

 

My car was screeching, i replaced the belts, even the alternator, tensioner etc. it stopped screeching for a little bit and then my crank pulley flew off. http://forums.corvetteforum.com/c6-t...night-wtf.html Thats the whole story. Dont mess around here, the labor bill was pretty big and i got lucky with a reasonable dealer. Good luck and if i were you, i'd play it on the cautious side.

 

i watched the vid again, the speaker on my laptop is junk, the sound is very similar to what my car sounded like. I'd def take it in. There is a tsb on this problem if your an 05.

 

Ill pay more attention. I was at a drive thru and was wondering whos janky car is making a sqeaking noise by the time I got to the window I realized it was me. It was a cold wet night and seems to be the only time I heard it, but if I hear it some more I will definately take it in.

 

The wobble in your crank pulley is causing a misalignment between it and the serpentine belt and the belt is squealing because of it. Soon it will start chirping at idle. Or it may throw the belt. That's when you have to get it fixed.

 

Don't wait to get it fixed. See some of the other posts. Waiting can lead to failure, and failure isn't pretty when your talking about rotating parts that are driven by the engine. Many distructive things can occur. Engines don't shut themselves down when something breaks mechanically. The engine just keeps supplying the motive forces that tears the crap out of anything else in its way.

JMHO.

 

After having the belts replaced *TWICE* by GM in attempt to fix my problem which really was only a bandaid fix as the problem never really fully went away, they finally admitted that it was a bad crank pulley/harmonic balancer and replaced it; now my car is running properly! It's been a LONG time coming and I'm so happy to finally have a working car that doesn't sound like a bunch of birds are chirping under the hood! LOL!

I've had this problem for well over a year, and have basically lived with it for the past 10,000 miles! Anytime I had suggested that it was the HB, they'd just keep telling me that "All Corvettes are like that!", and never would replace it. Well it's finally replaced now and it's a whole different car! WOW! What a difference! Sounds perfect! That was the problem from the very beginning, I guess it only had to get much worse for GM to do anything about it. It was so wobbley now that they couldn't deny it any longer. I'm fortunate it didn't fly off and smash everything in the engine compartment like was forewarned from Chuck @ Corvettes of Westchester. I would have just had him put a higher quality racing HB on, but I'm really strapped for cash these days so if I could get GM to do it under warranty, that was the preferred choice cause I can't afford any big auto bills right now, LOL! Thanks everyone for your comments! The Corvette forums rule!

 

wanna know if its the belt? dont try the belt goo just go get a crayola crayon from your kids and get the ribbed part of the belt good and colored up, the sound will go away quick if thats it.

 

 

In the beginning the noises were related to a "glazed" belt, but that was only part of the problem; the new HB totally fixed the issue 100%.