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Jul 18, 2007 | 02:01 PM

Neil Baker

Thread Starter

Burning Brakes

Joined: Sep 2001

Posts: 937

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From: Ponte Vedra Florida

Dealer Service Rep comment

Had My '02 coupe at the Dealer for what I think is a Cat rattle but the advisor says he has never heard of the cats on a Corvette making a rattle noise. He thinks it is probably a heat shield or exhaust leak. Of course he said he has never heard of "Corsa". I told him I have a Corsa cat back. Does anyone know of a service bulletin that deals with the cats on a C5?

Jul 18, 2007 | 02:07 PM

BitViper

Melting Slicks

Joined: Jan 2007

Posts: 3,107

Likes: 7

From: Sandy Ego Ca.

Ha!..my next door neighbor just had his C4 in the shop looking for a rattel..which turned out to be .......His Cats!

Jul 18, 2007 | 02:09 PM

Billdog350

Drifting

Joined: Dec 2005

Posts: 1,720

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From: East Hampton CT

Never heard of cat issues on a C5. Additionally the cats are integrated into your H pipe so you'll need to replace the whole assembly if the cats are damaged internally.

Are you sure the rattle is from the cats? There are a few springs down there suspending your exhaust that could rattle if broken or misaligned, as well as your shifter linkage and the torque tube/shaft.

Before you get the "shaft" at the dealer, see if you can get under there and inspect yourself. A low profile jack can get under the side of your car and jack the whole side of the car up for easy inspection. I do this often while I'm changing out my 02's (the longtubes foul them quickly).

Jul 18, 2007 | 03:07 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

Jack up the car, grab your trusty rubber mallet and give the cats a whack! If the honeycomb inner structure is deteriorated, you will hear what sounds like ROCKS bouncing around in the CAT . I would also whack the mufflers. If the car is bad, sometimes the crap ends up rattling around in side the mufflers!

If your cats sound good shake the entire muffler system (its mounted on springs) and listen for rattles.

Jul 18, 2007 | 05:29 PM

EStreeter

Burning Brakes

Joined: Feb 2005

Posts: 752

Likes: 1

From: Tulsa OK

I remember some threads about a rattle or the sound of coins jingling coming from the design of the stock H-pipe. Don't know why it would do that but I think there was a bulltetin on it.

Here is the link on the exhaust jingle

http://forums.corvetteforum.com/show...post1553056902

Last edited by EStreeter; Jul 18, 2007 at 05:34 PM.

Jul 18, 2007 | 05:58 PM

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

Likes: 192

From: At the beach in little Rhody

Quote:

Originally Posted by Billdog350

Additionally the cats are integrated into your H pipe so you'll need to replace the whole assembly if the cats are damaged internally.

Of course, if you show up in Carlisle the ground will be littered with these. Last year there were some kids carrying them off, likely to be sold for scrap

Jul 18, 2007 | 06:29 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

Quote:

Originally Posted by vettenuts

Of course, if you show up in Carlisle the ground will be littered with these. Last year there were some kids carrying them off, likely to be sold for scrap

Yep, there was a MOUNTAIN of them behind the exhaust changing area for the three exhaust vendors that were there.

vettenuts

If your going to Carlisle this year, we need to get together and meet just to say HI! That would be cool

Ill be there Thurs - Sunday

BC

Jul 18, 2007 | 06:38 PM

FLACHUSNRET

Le Mans Master

Joined: Jul 2004

Posts: 5,865

Likes: 6

From: Saraland Alabama

St. Jude Donor '11-'12-'13-'14-'15-'16

Quote:

Originally Posted by EStreeter

My '02 has that jingle noise and I have never done anything about it. I would rather tolerate the noise than have someone at the dealer cutting under my car and reconnecting my exhaust via claps rather than welding. As I understand it, it is very common in the '02's-04's. My car was doing that the day I bought it three years ago with only 4007 miles on it. It hasn't gotten any worse and I now have a little over 25k miles on it.