1998 Chevy camaro crunching noise

[mrleelizzle]

Can any one tell me why when I start up my camaro it sounds like fork in the garage disposel I think its coming from the muffler not sure.I change the oil because it was is black it was disgusting.after that it sound a little better but still rattles any advice

[Tech II]

Rattle in the exhaust could be the catalyst broken up in the converter.......hit it with a rubber mallet to see if that is where the noise is coming from...

[rkvons]

It could also be an exhaust hanger weld that has broke. So the metal from the hanger is hitting the exhaust system at the broken weld point.