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Old 04-08-2012, 06:57 PM   #1
krtw
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Default one noisy C5

I am going nuts trying to figure out the source of a rattling sound in my hatch area.... I have been under the car 3 times and I have taken out the hatch interior and I still can't isolate the sound. It occurs when I hit a bump, small or large, there are bumps everywhere in this town. It sounds like the source should be really obvious. I have adjusted the hatch bumpers several times, I removed the hatch locks and zip tied down the hatch and the sound still occurs. I have zip tied down several possible issues, no help. I recorded the audio, had to covert to video so I could post on photo bucket. While recording the audio I was going 25-35 mph through town. Tell me what you think it is....

http://smg.photobucket.com/albums/v6...t=MVI_0285.mp4
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Old 04-09-2012, 06:31 AM   #2
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maybe get someone to drive while you crawl back there and hunt for it..had one in my C3 couple years back, got the wife to drive while I hunted.. finaly found it .was the retractable sunshade ,inside the roller.. drove me nuts for weeks, til I found it ..good luck
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Old 04-09-2012, 10:31 AM   #3
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I thought of that....the trick is finding someone I trust to drive the car while I am in the hatch...lol.
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Old 04-09-2012, 10:35 AM   #4
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That sounds like the license plate to me.....
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Old 04-09-2012, 02:17 PM   #5
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Quote:
Originally Posted by C5inSB View Post
That sounds like the license plate to me.....

Me too, at least it is one of the many things I have looked at. It wasn't loose but I removed it and added some rubber mat to the frame piece, that did not help. The rattle sounds like whatever it is is really loose, frustrating part is that I have not found anything even slightly loose. I tried driving around an empty parking lot while looking toward the hatch area and the noise seems to come from every direction, probably bouncing off the glass. I'll see if my dad can drive it while I am searching....I trust him.

Last edited by krtw; 04-09-2012 at 02:20 PM.
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Old 04-10-2012, 10:53 AM   #6
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Have you had any work done on the car recently?
Sometimes sound carrys when you're moving and hides it's true source.
Tunnel plate lose?
Heat shield around fuel tanks?

Good luck
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Old 04-10-2012, 07:41 PM   #7
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I fixed it.... I can't believe it, what a relief !!!!

I think it was the rear sway bar, I noticed a small gap between the mounts and the frame (hard to see this) so I tightened up the nuts....they were not tight but not exactly loose either. The gap is gone after tightening the nuts. I had also removed the inner wheel wells, just searching for the issue....but did not really find anything there. I just drove all over the place and hit every bump I could find, this car has NEVER been so quiet before. Now all I hear is the normal thud sound when you hit a bump.....I LOVE THAT SOUND.
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Old 04-11-2012, 10:01 AM   #8
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Quote:
Originally Posted by fishslayer143@yahoo.com View Post
maybe get someone to drive while you crawl back there and hunt for it..had one in my C3 couple years back, got the wife to drive while I hunted.. finaly found it .was the retractable sunshade ,inside the roller.. drove me nuts for weeks, til I found it ..good luck
That is what I did years ago,put the wife in the hatch. Things like this drive me wild too.
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