Cats rattling?? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

frank1557 · 12-03-2011, 12:49 PM

I have subwoofers in my trunk ANSI noticed this morning that something was rattling around my cats. Anybody else have this issue?

jtzako · 12-03-2011, 01:00 PM

The heatshields near the cats can rattle for sure. The cats themselves COULD rattle but likely only if they are damaged internally.

frank1557 · 12-03-2011, 01:06 PM

Quote:

Originally Posted by jtzako

The heatshields near the cats can rattle for sure. The cats themselves COULD rattle but likely only if they are damaged internally.

It almost sounds like a bolt rattling. Got under the car and was looking but didn't see anything. My cats are fine from outside. How would they get damaged internally

jtzako · 12-03-2011, 01:16 PM

The stuff inside the cats can break and rattle. Not that it *should* happen but it can. Maybe try recording the sound so we can hear it?

frank1557 · 12-03-2011, 01:56 PM

Quote:

Originally Posted by jtzako

The stuff inside the cats can break and rattle. Not that it *should* happen but it can. Maybe try recording the sound so we can hear it?

My cats aren't damaged from outside. Think thu could still be internally damaged?
And I came I he conclusion that it could be my plates underneath. I didn't realize how thin they are.

first one · 12-04-2011, 05:51 PM

There is a TSB for a muffler rattle that I thought was coming from my solo cats and it was fixed under warrenty. Maybe not you're rattle, but worth mentioning.

JDP Tech · 12-05-2011, 01:50 PM

Quote:

Originally Posted by frank1557

My cats aren't damaged from outside. Think thu could still be internally damaged?
And I came I he conclusion that it could be my plates underneath. I didn't realize how thin they are.

Did you find and fix it?
Do you have any exhaust or engine mods?
If its still there, and you have it in the air, or can get it under it, when the exhaust is cooled down, hit the exhaust with your hand or rubber mallet to get the noise to come, that will help you locate the exact noise, and probably why its happening.

Even though the cats aren't damaged externally, the stuff inside can still break apart, and rattle. You'll be able to tell by hitting the exhaust if its them or not. It rarely happens, and when it does is usually caused by a bad tune.

frank1557 · 12-05-2011, 03:18 PM

Quote:

Originally Posted by Tech@JDP

Did you find and fix it?
Do you have any exhaust or engine mods?
If its still there, and you have it in the air, or can get it under it, when the exhaust is cooled down, hit the exhaust with your hand or rubber mallet to get the noise to come, that will help you locate the exact noise, and probably why its happening.

Even though the cats aren't damaged externally, the stuff inside can still break apart, and rattle. You'll be able to tell by hitting the exhaust if its them or not. It rarely happens, and when it does is usually caused by a bad tune.

No I'm completely stock. I finally goin the rattle. It was the heat shield where it curves up towards the middle. I lifted it up and started tapping everything and finally found what it was. Nothing major. Thank god!

frank1557 · 12-05-2011, 03:19 PM

Quote:

Originally Posted by first one

There is a TSB for a muffler rattle that I thought was coming from my solo cats and it was fixed under warrenty. Maybe not you're rattle, but worth mentioning.

Yeah no thanks man. Every bit of knowledge helps.

dk818 · 12-06-2011, 11:05 PM

Quote:

Originally Posted by frank1557

Yeah no thanks man. Every bit of knowledge helps.

did you remove the heat shield? i have the same problem, dont know what to do

frank1557 · 12-09-2011, 06:46 PM

Quote:

Originally Posted by dk818

did you remove the heat shield? i have the same problem, dont know what to do

No I left it alone.
I just wanted to know what it was.

12-03-2011, 12:49 PM	#1
frank1557 Account Suspended Drives: 2011 Inferno Orange RS Join Date: Jun 2011 Location: Bakersfield Posts: 382 View My Garage	Cats rattling?? I have subwoofers in my trunk ANSI noticed this morning that something was rattling around my cats. Anybody else have this issue?

12-03-2011, 01:00 PM	#2
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	The heatshields near the cats can rattle for sure. The cats themselves COULD rattle but likely only if they are damaged internally. __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

12-03-2011, 01:16 PM	#4
jtzako Drives: 2010 IBM Camaro SS Join Date: Jun 2007 Location: DFW, Tx Posts: 1,157	The stuff inside the cats can break and rattle. Not that it should happen but it can. Maybe try recording the sound so we can hear it? __________________ 2010 Camaro SS Imperial Blue \| CAI Inc, CAI \| Solo Hi Flow Cats \| X-Pipe \| Backup Camera \| PDIM

12-04-2011, 05:51 PM	#6
first one Drives: SSRS - black, GFX, SSX wheels Join Date: Aug 2009 Location: IN Posts: 936	There is a TSB for a muffler rattle that I thought was coming from my solo cats and it was fixed under warrenty. Maybe not you're rattle, but worth mentioning. __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
fuse pull/ L99/ cats	mgoodbar	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	4	10-30-2011 08:47 PM
Help with Hi-flow cats vs No Cats	Arsenal11	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	17	10-26-2011 12:19 AM
Those with Headers. Cats or No Cats?	Rogan	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	46	10-20-2011 08:58 AM
High Flow Cats with Shorty Headers?	Aaron1121	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	14	07-06-2010 01:56 AM
Ohhhhh C-A-T-S Cats Cats Cats!!!!!	acscamarochick06	Off-topic Discussions	1	01-14-2008 02:57 PM