Catalytic converter fell apart internally - it rattles!

[savage1987]

I was laughing at Cogez's VP Calais the other day because when you rev it to about 3000rpm, hold it, then let go, you get an odd-sounding rattle from the catalytic converter. Sounds horrible.

The other day I realised, to my embarrassment, that my VN has the same problem! :rofl: It's just harder to hear mine because I have a 2.5" with just one muffler, no resonator, while he's got a pretty standard system on his.

I've been quoted $270 for instal of a new converter, or $100 for a second hand one . . . is this reasonable? Considering the fact that I'll be getting Pacemaker extractors in the future (possibly soon) should I get a different type or size? I've heard the ones from the VT/VX commodores flow really well - would it be simple enough to fit one of those instead?

Cheers guys
Sam

 

[savage1987]

We picked up a second-hand one ($100) for Cogez's VP today. Bolted it up but having the same rattle problem. Do ALL VN/VPs have this problem?? What else could be causing this rattle? Something in the engine itself that just SOUNDS like it's coming from the exhaust??

Or is it probably just because the second-hand one was just as rooted as the original one??

PS The 3800 block has a wicked crackle if you run it with the exhaust unbolted at the end of the headers (couldn't resist )

 

[90VN55]

well i took my exhaust off and i found that my muffler was full of rust.
it could be that rattling and not the cat

 

[Morton]

I have a good vn/p cat sitting in the garage. Shame you live in Canberra. You should be able to pick one up from a good wrecker for $50-60.

 

[greenfoam]

My wrecker charges 30-40$ as that's what the metal guys pay for them

 

[savage1987]

But a second-hand one from a VP or whatever will be just as old = worn as the current one . . .

The rusted muffler issue - maybe on Cogez's, but my system is less than 12 months old from the cat back.
hmmm . . .

 

[xcop5l]

before you put the cat on give it a shake if it rattels dont use it
go over your mufflers and give them a bash with your fist if there rooted they will rattel

 

[greenfoam]

But a second-hand one from a VP or whatever will be just as old = worn as the current one . . .

The rusted muffler issue - maybe on Cogez's, but my system is less than 12 months old from the cat back.
hmmm . . .

A dead one can be empty inside! ie noooooothing in it.

If you hold the cat up to the light you can see right though, if it looks all kinda tripy but all even like a flies eyesight then its ok , you can get rattles in the cover of them with out the wires inside being broken

 

[savage1987]

Neither one rattled when shook. I'll give the mufflers a bash and see what happens. Doesn't explain my rattle though . . . maybe mine's a cat and his is a muffler :rofl:

 

[Shortstuff]

My tailpipe trim rattles at low revs. It drives me mad - sounds like the exhaust is rubbing on the underside of the car.