I think my catalitic converter is done

[Jimmy D]

I wonder what the expected life span is of an OE cat. While I don't suspect the one on my OG '91 is bad, with 85,000 miles this truck sat unused a lot over it's 32 years so internal cat rust surely has eaten some of it. This truck has had 2 mufflers and tail pipes but nothing ahead of the **** over it's lifetime.

Oh, and on the weed thing, my wife works in a smoke shop, mainly working the driveup window. She has asthma but does good until someone pulls up to the window and weed smoke comes boiling out of their car window. It's like a blast in her face and she has to grab an inhaler.

 

[someotherguy]

The few factory cats I've had fail seem to be in the low 100K mile range. They still worked, but were buzzing/rattling in the case because the insulation band burns out and lets the core bang around in there. Happened on my '92, '94, and '06. The '92 must have burned out before I even got the truck but I didn't notice; truck already had a lot of bangs and rattles and buzzing, lol.. it was a pile. What finally got my attention is when the core started breaking up and a piece of it lodged in the muffler inlet. That was in the 200K+ mile stage of life of that truck, and it had a hard life.

Richard

 

[PlayingWithTBI]

FWIU, it's a Federal law that Catalytic Converters have to be guaranteed for somewhere ~75K - 100K miles due to them being part of emissions systems.

 

[Pro439]

I had both of the cats on my 98 break and rattle around and then a piece big enough turned sideways into the outlet and the truck died. I had the outlet O2 sensors deleted with the egr delete so I was able to just cut them apart and take what was left of the pieces out

 

[Xxl2]

400000 miles on this sent it to magna flow for a rebate for the old one new one going in this week. Yes alot of little balls came out of it

 

[df2x4]

Like I mentioned earlier I've had two of the Magnaflow cat assemblies for the Vortec 4.3L fail prematurely. Hope you have better luck than I did.

 

[Erik the Awful]

Yes alot of little balls came out of it

Gather all of those palladium pellets up and recycle that cat! That'll probably net you around $300.

 

[Xxl2]

Put the new cat in works well. All the pellets are in the street it got the hole while driving. Sent the the cat to magna flow for a rebate

 

[Idaho_z71]

I was driving home when i heard abunch of little particals come loss. After that the truck sounded much deeper. The nosie seems to be comming around the cat. I think the honey comb disinagrated. Its a 1991 c 1500 4.3 Is it correct these trucks like a bit of back pressure? Should i even bother with a new cat. If so is one better than the other.?

Same thing happened to me recently. Both my cats blew out and one had a chunk rattling around the inside. I ordered universal cats off Amazon (I was skeptical about it because I've heard they don't always work) and welded then in place of the old ones. The computer on my 98 likes them and I just passed emissions

 

[Buskinrobbins]

Yeah but it be nice for all those hippies to get a taste of they smell. I hate pulling up next to hippies smokeing weed They can inhale some 93 octane

Cringe