Are my Cats breaking up??
Thread Starter
Intermediate
Joined: Jul 2008
Posts: 26
Likes: 0
From: Columbus Indiana
Are my Cats breaking up??
I noticed my car making a knocking type noise when you rev the engine - was checking out where it was coming from and it was really hard to pin down. It was loudest when you switch the engine off and the engine rocks a bit.
When I was checking everything out though, I noticed really small (<1mm) flakes of metal in the left two tailpipes
and then also on the ground behind that muffler, where I usually park 
So anyway, I start to think about this sound a bit more, and it DOES sound like it's coming from underneath the car, in the area of the cats....
Could my cat be loose and breaking up inside??? Thing is, the car only has 7000 miles. It's a 2005 Z-51 C6. I bought it with 3000 miles last year, and have done one track day. I did notice the exhaust got a bit louder after the track day.....
Has this ever happened on other cars?
When I was checking everything out though, I noticed really small (<1mm) flakes of metal in the left two tailpipes
and then also on the ground behind that muffler, where I usually park So anyway, I start to think about this sound a bit more, and it DOES sound like it's coming from underneath the car, in the area of the cats....
Could my cat be loose and breaking up inside??? Thing is, the car only has 7000 miles. It's a 2005 Z-51 C6. I bought it with 3000 miles last year, and have done one track day. I did notice the exhaust got a bit louder after the track day.....
Has this ever happened on other cars?
Le Mans Master
Joined: Jan 2005
Posts: 5,611
Likes: 5
From: Thousand Oaks California
Be careful. I have seen where debris from the converters can somehow work its way up into the combustion chambers (not on Corvettes, but other vehicles). This can cause some major damage.
Racer
Joined: Apr 2007
Posts: 255
Likes: 0
From: Shrewsbury MA
Unless your warranty has been invalidated due to mods, you may be in luck. I just checked the warranty book for my '08 Vette and it states that the catalytic converters & powertrain control module are covered for 8 years or 80,000 miles, whichever comes first.
Le Mans Master
Joined: Dec 2005
Posts: 6,993
Likes: 1
From: Vail, Arizona
Safety Car
Joined: Jan 2006
Posts: 4,598
Likes: 78
From: Miami FL
2020 C6 of the Year Finalist - Unmodified
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16,'17,'18-'19-'20-'21-'22
EPA says YES ! ! !
Check out the EPA website: http://www.epa.gov/oms/consumer/warr95fs.txt
Your cats are indeed under a warranty for 8 years and 80,000 miles. Make GM do something about this.
Your cats are indeed under a warranty for 8 years and 80,000 miles. Make GM do something about this.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
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Thread Starter
Intermediate
Joined: Jul 2008
Posts: 26
Likes: 0
From: Columbus Indiana
Well, they've been happily together for 4 years now, since that happy day in the manufacturing plant.
Unfortunately, things got a bit heated, and the bond between them just wasn't strong enough, so now that relationship is falling apart!
Unfortunately, things got a bit heated, and the bond between them just wasn't strong enough, so now that relationship is falling apart!
Burning Brakes
Joined: Sep 2005
Posts: 1,066
Likes: 0
From: Canonsburg home of Yenko Chevy (gone but not forgotten) Western PA
You might have bought a car with the cats gutted. If so there are rattles because all the material was not all taken out. Illegal YES, done ALOT