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Recommended Posts

my exhaust makes a pretty loud hollow rattling sound during warm up as well as btw 1200-2000rpms.

i'd originally thought an exhaust mount was loose & brought it to a (non-porsche) mechanic take a look at it.

was told the cats hv split / needs to be replaced (+ since cats are quite expansive, i should try to bring it back

to dealer to get it replaced under warranty).

my car (997c2) is just over 2 years old with 8500miles (so i'm no longer under the 2 years/24000 miles warranty

period).

i've read in another renntech forum thread - U.S. Environmental Protection Agency requires auto manufacturers

to cover cats (& other related components) for a period of 8 years/80,000 miles. unfortunately, i'm not in the

U.S. any idea if porsche will still cover this item?

any feedback / opinions greatly appreciated...

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my exhaust makes a pretty loud hollow rattling sound during warm up as well as btw 1200-2000rpms.

i'd originally thought an exhaust mount was loose & brought it to a (non-porsche) mechanic take a look at it.

was told the cats hv split / needs to be replaced (+ since cats are quite expansive, i should try to bring it back

to dealer to get it replaced under warranty).

my car (997c2) is just over 2 years old with 8500miles (so i'm no longer under the 2 years/24000 miles warranty

period).

i've read in another renntech forum thread - U.S. Environmental Protection Agency requires auto manufacturers

to cover cats (& other related components) for a period of 8 years/80,000 miles. unfortunately, i'm not in the

U.S. any idea if porsche will still cover this item?

any feedback / opinions greatly appreciated...

I think the initial start sound is typical of most if not all 997's. My 2005 997S makes the same sound when I first start it up in the morning. It's most likely amplified some since it's in the garage.

The CATS are covered under the Federal Emssions Warranty which is greater than the 4yrs/50k mile USA new car warrany. Unless you fail an emissions test I'd be surprised if PCNA is inclined to consider your complaint. I could be wrong.

Let us know if you bring it up before your local Porsche dealer.

Good Luck!

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alexsee do you have a sport exhaust? There are a lot with a vibration inside the muffler.

yes i do.

but b/c the rattling is similar in pitch (but considerably louder) when warming up the cats, &

comes on btw 1200-2400rpms on every gear, i am inclined to believe that it is a problem with

the cats.

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my exhaust makes a pretty loud hollow rattling sound during warm up as well as btw 1200-2000rpms.

i'd originally thought an exhaust mount was loose & brought it to a (non-porsche) mechanic take a look at it.

was told the cats hv split / needs to be replaced (+ since cats are quite expansive, i should try to bring it back

to dealer to get it replaced under warranty).

my car (997c2) is just over 2 years old with 8500miles (so i'm no longer under the 2 years/24000 miles warranty

period).

i've read in another renntech forum thread - U.S. Environmental Protection Agency requires auto manufacturers

to cover cats (& other related components) for a period of 8 years/80,000 miles. unfortunately, i'm not in the

U.S. any idea if porsche will still cover this item?

any feedback / opinions greatly appreciated...

I think the initial start sound is typical of most if not all 997's. My 2005 997S makes the same sound when I first start it up in the morning. It's most likely amplified some since it's in the garage.

The CATS are covered under the Federal Emssions Warranty which is greater than the 4yrs/50k mile USA new car warrany. Unless you fail an emissions test I'd be surprised if PCNA is inclined to consider your complaint. I could be wrong.

Let us know if you bring it up before your local Porsche dealer.

Good Luck!

Also, he said he's not in the US so I don't think the extended emissions warratny is going to help him. Edited by jhbrennan
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