C5 loud rattling
Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
C5 loud rattling
I have an 02 MN6 C5 when driving makes a loud rattling, like a coin in a tin can. Happens when I'm accelerating, but goes away in higher rpms. I can also hear it barely when it idles if I put my ear near the exhausts, which are Corsa 2 tip titaniums. Can't figure out what it's coming from.
Team Owner
Joined: Aug 2003
Posts: 24,491
Likes: 312
From: Scottsdale AZ
Check the exhaust shield down the center of the car - -it's a heat shield and it can come loose . . .sometimes a bad cat converter can make a rattling noise under acceleration . . but my bet is a loose piece of shielding.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Yep; loose shielding, converter gone bad (loose pieces inside), front or rear mount (spring mount at rear) assemblies, or depending how loud the infamous H-pipe jingle.
Grab a rubber mallet (or your hand if you have no mallet), and get under your car. Bang on the pipes to try and find the source. Any rattling from the mallet?
Is it most pronounced around 2000 RPM or so? Also on decel at the same RPM?
Grab a rubber mallet (or your hand if you have no mallet), and get under your car. Bang on the pipes to try and find the source. Any rattling from the mallet?
Is it most pronounced around 2000 RPM or so? Also on decel at the same RPM?
Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
One exhaust tip is a bit loose however the one that is more firm, when I hit it lightly it makes a similar noise, and the noise is loudest at 2-3k rpm. It sounds like there is a rock in there, but I know thats not the case
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Eliminate
IMO eliminate any known sources first; tighten up those tips.
At first I thought the most likely was just the H-pipe, now I'm guessing from your description that a cat is blown. Any chance of recording a video?
Main questions I have; has it always done this, did it just start, was it a sudden change?
At first I thought the most likely was just the H-pipe, now I'm guessing from your description that a cat is blown. Any chance of recording a video?
Main questions I have; has it always done this, did it just start, was it a sudden change?
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Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
IMO eliminate any known sources first; tighten up those tips.
At first I thought the most likely was just the H-pipe, now I'm guessing from your description that a cat is blown. Any chance of recording a video?
Main questions I have; has it always done this, did it just start, was it a sudden change?
At first I thought the most likely was just the H-pipe, now I'm guessing from your description that a cat is blown. Any chance of recording a video?
Main questions I have; has it always done this, did it just start, was it a sudden change?
Safety Car
Joined: Feb 2013
Posts: 4,346
Likes: 755
From: Greensboro Nc
Cross titaniums you say..? Pretty sure those are absolute garbage and you should immediately remove them to avoid damaging your car. I'll gladly... Errr... "Dispose" of them onto my z06 if you want to drop them off at my place.
My exhaust was rattling very slightly on the body where the pipe went over the axle. May want to check there too.
My exhaust was rattling very slightly on the body where the pipe went over the axle. May want to check there too.
Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
Cross titaniums you say..? Pretty sure those are absolute garbage and you should immediately remove them to avoid damaging your car. I'll gladly... Errr... "Dispose" of them onto my z06 if you want to drop them off at my place.
My exhaust was rattling very slightly on the body where the pipe went over the axle. May want to check there too.
My exhaust was rattling very slightly on the body where the pipe went over the axle. May want to check there too.
Melting Slicks
Joined: Dec 2014
Posts: 2,257
Likes: 433
From: Bossier City Louisiana
I have an 02 MN6 C5 when driving makes a loud rattling, like a coin in a tin can. Happens when I'm accelerating, but goes away in higher rpms. I can also hear it barely when it idles if I put my ear near the exhausts, which are Corsa 2 tip titaniums. Can't figure out what it's coming from.
Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
Same exact thing happened to me after installing my x pipe. It was ceramic pieces of the inside of the factory cats that had broken off and rattled their way through the exhaust and out of the tail pipes. I took her out on the interstate and really got on her and noticed the noise had gone away. When I got back home a piece the size of a small rock was sitting inside one one the exhaust tips.
Melting Slicks
Joined: Dec 2014
Posts: 2,257
Likes: 433
From: Bossier City Louisiana
Identical. I basically had to blow it out by running pretty hard on I-20. For me, it rattled loud in the second gear rpm range.
Thread Starter
Instructor
Joined: Mar 2013
Posts: 160
Likes: 3
From: Missouri
Burning Brakes
Joined: Oct 2008
Posts: 800
Likes: 12
From: Wichita Kansas
I had a similar rattle here is what I found....
https://www.corvetteforum.com/forums...attle-lol.html
hope yours is different
https://www.corvetteforum.com/forums...attle-lol.html
hope yours is different