Cat's again....

staq50

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Hey guys just asking, has anyone that has removed their cat seen any signs of the cat failing, ie cat dust and or fragments? I know when high mileage cats can fail causing no end of problems...
 
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Don in Lodi

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A melt down of the cat will cause excess back pressure and loss of power, some excessive bellowing from the airbox as the exhaust pressure isn't allowed to escape in the right direction. A simple back pressure tester screwed into one of the O2 sensor bungs will alert you to a problem, anything over 1 psi at idle up to 2000 rpm is too much. Cat disintegration will also blow chit into your muffler, it will rattle.
 
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staq50

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A melt down of the cat will cause excess back pressure and loss of power, some excessive bellowing from the airbox as the exhaust pressure isn't allowed to escape in the right direction. A simple back pressure tester screwed into one of the O2 sensor bungs will alert you to a problem, anything over 1 psi at idle up to 2000 rpm is too much. Cat disintegration will also blow chit into your muffler, it will rattle.
yep exactly, I also have an Elgrand van that blows front cats and blocks the rears, i removed my rears on the van and am about to remove the one on my Tenere as well, thing is alot of riders and drivers don't notice the pending problems straight away and run into all sorts of probs, and hard to recognize where the fault lies once it's happened, :)
 

Don in Lodi

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As to your question, I have never, ever, read of a cat failure on a Tenere. It's possible they may show some loss of scrubbing efficiency over time, but nobody does emission testing yet that I'm aware of. Europe may, I've just not heard of it. The US has threatened to do it for decades.
In the early days of cat tech there was a huge GM multi bed that could melt down. The modern Ford cats tend to delaminate and rattle, eventually throwing chit into the muffler. I haven't replaced a cat for anything but efficiency problems here in the last decade or so... And theft.
 

EricV

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If you look at the type of Cat in the Super Ten's pipe, you'll see it's not going to deteriorate like a honeycomb brick style can. We have people with over 200k on their S10s w/o any cat issues. I think you would have to abuse it intentionally to have an issue.

Most of the people that removed cats did it at relatively low mileage. The pics I saw all showed them in great condition. What do you consider "high mileage" on your Super Ten? It may not be what others consider high mileage. ;)
 

Sierra1

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Back in the '90s, Jeep's 4.0 liter had a cat that would self destruct as soon as it hit 100k miles, and start rattling. No telling who was suppling the cat at that time. My YJ has a Ford bolt pattern, and GM switches. It's quite the little bastard child. :) Cats, and Jeeps, have come a l o n g way.
 

staq50

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If you look at the type of Cat in the Super Ten's pipe, you'll see it's not going to deteriorate like a honeycomb brick style can. We have people with over 200k on their S10s w/o any cat issues. I think you would have to abuse it intentionally to have an issue.
It was just a consideration as cats tend to be overlooked, the Tenere cats a pretty compact from what I've seen...and seem to be a little constrictive, over fueling is a problem and will kill a cat, but the Tenere's seem lean anyway...I'm removing mine for the the only reason as to have the less restricted exhaust, remember reading a member here cut one out and modified the rear on a standard exhaust and made nice gains....not super gains, but noticeable.. I have 75k's on mine which is pretty moderate k's for these bikes....

Most of the people that removed cats did it at relatively low mileage. The pics I saw all showed them in great condition. What do you consider "high mileage" on your Super Ten? It may not be what others consider high mileage. ;)
 
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