Rattle inside catalic converter

[AznGA]

There is metal rattle sound coming from INSIDE the cat converter. I don't know what kinda stuff is inside it. Any ideas?

[Craig99SE2]

Originally posted by AznGA
There is metal rattle sound coming from INSIDE the cat converter. I don't know what kinda stuff is inside it. Any ideas?

The ceramic honeycomb has melted and/or broken apart and is rattling inside. The only way to fix it is to replace it. I'd recommend fixing it ASAP too. Sometimes the piece can shift and end up blocking the cat off totally and then exhaust gaskets, flanges, etc. will start to leak and or blow out.

[AznGA]

2002 with 19k miles.
How can that happen? Mine is stock too.

[fishhunter911]

any dents or points of impact on the converter itself?? Something could have hit it and broken it loose

[CATAssassin]

If you hit it with a hammer, and it rattles around, its shot and it needs to be replaced. But dont fret. Your under warranty.

[AznGA]

Originally posted by fishhunter911
any dents or points of impact on the converter itself?? Something could have hit it and broken it loose
Outside looks fine.

[fishhunter911]

Originally posted by CATAssassin
If you hit it with a hammer, and it rattles around, its shot and it needs to be replaced. But dont fret. Your under warranty.


yeh dont worry to much... call the dealer let them know and take it in.... its covered under emissions warranty... has to be by law:thumbs:

[Gimli]

Originally posted by fishhunter911
yeh dont worry to much... call the dealer let them know and take it in.... its covered under emissions warranty... has to be by law:thumbs:

Actually, under the emissions warranty, it's only covered if it fails a test or if it's not performant enough to pass a test. It could sound like a baby toy if it still passes emissions testing GM doesn't have to change it.

On the general new car warranty though it's a defective part that is covered.