Catalytic converter rattle - time to change?

[Juice75]

I've been hearing a rattle at idle lately, and finally pinpointed it to my driver side cat. When I tap it with a hammer, it sounds like it's full a BB's. Is it time to change it out?

No check engine light, but the exhaust does smell more than it used to.

 

[Gzes]

Sounds like the honey comb broke. Yea get a new one and sell it for scrap..should get $50+ for it as scrap for the platinum

 

[livingez_123]

I only got $20 each for some I had.

 

[Gzes]

I sold a honda cat the other day for $50. Coulda got more but it was a dude that came from city to buy alot and i was like whatever. Cats are worrh good money because of the platinum in them but scrao hards try to scam you by paying crack head prices

 

[Juice75]

Thanks! So how do you find a place to sell them? Google platinum scrap yard?

---------- Post added at 03:11 PM ---------- Previous post was at 03:07 PM ----------

Also, where's a good place to buy new cats? I see the full y-pipe with both cats on Rock Auto from $300-350. Would be nice to spend a little less.

---------- Post added at 04:46 PM ---------- Previous post was at 03:11 PM ----------

Found places to scrap the old converters. Now just have to pull the trigger on new ones. Looks like Amazon has the best price on the Walker for $330.

 

[Gzes]

You can cut both and get magnaflow high flow cats on both

 

[DJay]

If it's a 'harmonic' rattle or buzzing, it is probably the heat shield above your cat. Mine was broken at one of the mounts, took it to the mufler ship where they cut the whole thing off and threw it onto the pile of Tahoe heat shields.

 

[Juice75]

I had that rattle, too, but this one was different and directly from the cat.

 

[Yukonboy2014]

Mine rattles at idle for last 100k miles on driver's side down under the truck while the a/c is on. Will check into cats tomorrow and see what the deal's about.