The catalytic converter on my 89' Caprice Classic (Brougham) is pretty rusty and has been making an awful rattling sound (similar to banging multiple coat hangers on a coffee can) recently (mostly while idle or warming up). It's so rusty that if I tap it with my palm, small chunks of rust will fall out of the honey-comb like areas. Besides the noise, my car has been kind of put-putting after what feels like a cough in the exhaust system (It'll feel like a small jerk or two forward and the noise will follow)... Now I'm no rocket-scientist, but I'd assume replacing that'd be the best step forward... So my question is, is there anything specific I should look for in a catalytic converter? I assume I should buy a new one as opposed to going to a junk yard? Would anyone make any recommendations?

PS: I'm in California, the land of hippies and environment regulations if that complicates things :uhoh:

Look on either autozone, oriellys or advanced auto parts. Put in your make, model and year and it'll give you the part you need. Buy a new one, I just replaced one on my 98 Pontiac. Cost me $180 out the door. :) Just amke sure it says its approved for Cali. emissions.

I did spray the bolts with some PB balster a few days before I tackled the job. Prolly took me an hour and i was done. :)

Your only choice is to buy a new one. US Federal regulations prohibit the resale of used catalytic converters.

I replaced mine about 3 years ago with one from Autozone. The direct fit one bolts right in and costs about $70.

so the shield is reattling

its common happens all the time

reattach it or remove it

it doesnt mean the cat needs replaced or that its bad

its only bad if its plugged or not passing emissions testing

good luck