Noisy C5 rattle
Thread Starter
Cruising
Joined: Apr 2012
Posts: 10
Likes: 0
Noisy C5 rattle
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, but I can't find ANYTHING wrong. 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
http://smg.photobucket.com/albums/v6...t=MVI_0285.mp4
Last edited by krtw; Apr 9, 2012 at 02:07 AM.
Thread Starter
Cruising
Joined: Apr 2012
Posts: 10
Likes: 0
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.
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.
Thread Starter
Cruising
Joined: Apr 2012
Posts: 10
Likes: 0
I hope it helps..... I am REALLY happy I finally fixed this, the car is sooooo much more fun to drive without the rattling noises. I was seriously considering my other options, but now I will be keeping the car.
Intermediate
Joined: Aug 2009
Posts: 32
Likes: 0
krtw, been there, done that! When I bought my '00 Coupe a couple of years ago, same rattling, drove me crazy! Tightened up the sway bar ends and fixed the rattle. My car has a Hotchkis sway bar and I was thinking maybe they are more prone to this but if yours is stock, I guess maybe not. Glad you found the culprit too!!
Heel & Toe
Joined: Nov 2008
Posts: 15
Likes: 0
I dont know where the rattle is coming from. I replaced the end links, tightened up the sway bar. Yesterday I got under the car with zip ties and secured everything. It's still rattling back there! But it is better.
Thread Starter
Cruising
Joined: Apr 2012
Posts: 10
Likes: 0
Another thing I had done was I added a spring across my exhaust hanger springs. Search the net for: Twisted Underground Thread 316. This forum won't let me post the link...lame.
This did not solve my issue, but it was worth a try and may help you.
This did not solve my issue, but it was worth a try and may help you.
Last edited by krtw; Apr 20, 2012 at 05:58 AM.
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