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Location:
Ryde
Registered:
September 2004
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 my car destroyed the cat...again
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Tue, 25 October 2005 12:32
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i have a 100kw 4age ae82.
with full 2.25inch exhaust, genie extractors
and it seems as if my car just loves to destroy my cat converters 
in 2004. i replaced my cat last year after the inside collaped.
THEN in sept 2005, only  about 2 months ago the cat blew again, i also found all these carbon deposits inside the resonator (hotdog) thing.
the exhaust man said my car was probibly running too rich, which is why the cat went.
so i got a bigger cat and a new resonator too.
(i also got a new map sensor and tried testing the O2sensor)
and NOW today, less than 1500kms since the new cat was fitted, it blows AGAIN
im soo pissed off about my cars taste for cats
WTF is going on, can you guys please help me
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Location:
1st street on the right
Registered:
November 2002
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Re: my car destroyed the cat...again
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Tue, 25 October 2005 12:45
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1. Clean up.
2. List on Ebay as hi flow cat
3. ???
4. Profit.
5. Repeat until you can afford that sprinter you always wanted.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: my car destroyed the cat...again
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Tue, 25 October 2005 12:47
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easy, it's runnign way rich, the cat gets too hot, and it collapses...
next question?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: my car destroyed the cat...again
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Tue, 25 October 2005 12:47
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| clubagreenie wrote on Tue, 25 October 2005 22:45 |
1. Clean up.
2. List on Ebay as hi flow cat
3. ???
4. Profit.
5. Repeat until you can afford that sprinter you always wanted.
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LOL 
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Location:
Canberra
Registered:
July 2005
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 00:42
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Mang, I could make some tops jokes about cars destroying cats...
Or I could just voice my opinion that yep, it sounds like your car is running way rich and cooking the bugger.
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Location:
sydney
Registered:
March 2003
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 00:50
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my car has stuffed 2 cats aswell
these days the cats are made from cheap shit stuff
i heard this from an exhaust fitter guy
he told me to get good 2nd hand ones from factory cars
they are much better quality and last for ages
for a cat to be stuffed my being rich it has to be super rich or super lean where the extreme heat from being lean can melt them too
but if yr mixtures are ok then it just might be shit quality cats
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Location:
eastern suburbs, melbourne
Registered:
March 2005
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 02:24
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hey guys, quik question:
how do you know your cats destroyed? is there a performance diff?
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Location:
Brisbane
Registered:
February 2003
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 02:48
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| illuminatus wrote on Wed, 26 October 2005 12:24 |
how do you know your cats destroyed? is there a performance diff?
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a) blocks up with combustion particulate reducing zorst gasflow - so yes, a performace hit
b) gets red hot from accumulate combustion particulates burning - fire risk
c) core disintegrates and tries to make its way noisily out the zorst system in sections - clink ting clink
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 03:49
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| sideshow wrote on Wed, 26 October 2005 10:50 |
my car has stuffed 2 cats aswell
these days the cats are made from cheap shit stuff
i heard this from an exhaust fitter guy
he told me to get good 2nd hand ones from factory cars
they are much better quality and last for ages
for a cat to be stuffed my being rich it has to be super rich or super lean where the extreme heat from being lean can melt them too
but if yr mixtures are ok then it just might be shit quality cats
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it's the heat of combustion of the fuel inside the cat that causes the problems...
lean mixtures are a bit hotter coming out of the engine, but nothing compared to the heat generated by burning fuel!!!
fwiw, i have run catalytic convertor material in furnaces for.... 4 years? 5 years? CONTINUOUSLY at 400 degrees C and they are still perfect.
they should be able to withstand around 600degC and still live (you may start to see the metal glowing at night if it is 600C)
Cya, STewart
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Location:
Ryde
Registered:
September 2004
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 05:37
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| illuminatus wrote on Wed, 26 October 2005 12:24 |
hey guys, quik question:
how do you know your cats destroyed? is there a performance diff?
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you can tell its screwed because it makes a very awful noise. mine sounds like as if its a turbo full of rocks coming on boost.
also it sometimes gives off that rotten egg smell, which its the metals inside the core burning.
and performance feels very sluggish
with my first cat the metallic core disintegrated into a few large peices
with the second cat the glue stuff that holds the core inside the metal housing melted causing a big rattle
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Location:
Ryde
Registered:
September 2004
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 05:40
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oh,
today i got another cat for free as it was still under warranty 
the manufacture tested for carbon and fuel deposits.
there was no such presence of such chemicals.
i guess it must be a dodgy cat
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Location:
eastern suburbs, melbourne
Registered:
March 2005
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 05:51
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| KLR16V wrote on Wed, 26 October 2005 15:40 |
oh,
today i got another cat for free as it was still under warranty
the manufacture tested for carbon and fuel deposits.
there was no such presence of such chemicals.
i guess it must be a dodgy cat
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but to go through so many cats, one would think there is a problem.
have you tried a high flow cat? the greater surface area might solve stop it from over heating.
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Location:
Ryde
Registered:
September 2004
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Re: my car destroyed the cat...again
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Wed, 26 October 2005 07:24
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yep, the new cat is a much bigger flowing cat than the previous ones. it is also a better brand according to the exaushtshop man.
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