How long does a cat live?

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discool said:
Are you then referring to DPFs which diesel cars have fitted and the MOT test on them.
https://www.gov.uk/government/news/new-rules-for-mot-to-test-for-diesel-particulate-filter
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tryhard2 said:
Interesting comment and link. Is the DPF part of the catalytic converter, or a seperate issue?
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yes 1 of the mot tester that is a LZ member yesterday put the new, soon to go into effect law. Them cats on diesels were the early attempt for a DPF and were fitted as such. So It looks like them 300TDI might be in a sticky wicket as well as TD5's come MOT time. Now you may call them cats but the law says different. They are tired of diesels giving off black smoke and the phrase of 4x4's being the main target in the article.(Was read in another article) Just saying is all........ so don't bitch to me:rolleyes:
 
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That may be right, there's more than one post in this forum and others where it's stated that D1 or 2 do not have a CAT but a 'smoke particle collector' and have been told remove it and it will improve performance, which now doubt would be true if the so called part was restricted due to lack of maintenance.
 
discool said:
That may be right, there's more than one post in this forum and others where it's stated that D1 or 2 do not have a CAT but a 'smoke particle collector' and have been told remove it and it will improve performance, which now doubt would be true if the so called part was restricted due to lack of maintenance.
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Short drives and stop and go city kills them. Get on a motor way and a fifty mile trip will clean them. Cars/truck that spend most of there life at operating temps/ highway miles seldom fail.
 
Thor1950 said:
yes 1 of the mot tester that is a LZ member yesterday put the new, soon to go into effect law. Them cats on diesels were the early attempt for a DPF and were fitted as such. So It looks like them 300TDI might be in a sticky wicket as well as TD5's come MOT time. Now you may call them cats but the law says different. They are tired of diesels giving off black smoke and the phrase of 4x4's being the main target in the article.(Was read in another article) Just saying is all........ so don't bitch to me:rolleyes:
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I'm no expert on this by any means, but having done a bit of web searching to try and make sense of it all I humbly submit that a DPF and a catalytic converter are two completely separate entities.
A particulate filter, of any type, does exactly what it says on the tin. It will filter particles from whatever medium they are suspended in, in the case of a DPF this is microscopic but solid soot particles from exhaust gasses.
A catalytic converter, however, does not remove any matter from the exhaust fumes. Instead, it converts the more toxic elements of the exhaust gas into something less harmful via a chemical catalytic reaction.
Therefore, a catalytic converter is not a DPF and is not designed or installed for the same purpose of one.
DPF's have been a mandatory requirement on diesel vehicle only since 2009, and therefore any car manufactured before then would not have been required to have one fitted in order to meet emission laws.
Therefore any diesel engined vehicle built and registered before 2009 does not require a DPF unless it was part of the manufacturers original design, and this certainly doesn't apply to old 300tdi's and unless the MOT tester actually looks in depth at whether a vehicle left the factory with a catalytic exhaust system then it wont fail for not having one.
That's what I reckon, anyway.
 
True, but a cat still isnt a DPF so it wont effect older vehicles like my 300 that never had a DPF fitted. In theory, the missing cat should produce a fail but, in practice, I dont think it will cause any more issues than it would at present.
 
300 tdi hasn't got a cat its a soot collector, cut one open and take a look. It just looks like a cat in fact its just a waste of space and restricts flow, bin it
 
landowner said:
300 tdi hasn't got a cat its a soot collector, cut one open and take a look. It just looks like a cat in fact its just a waste of space and restricts flow, bin it
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:cheer2::cheer2: they look the same so people called them that and that was the first DPF's and come 2014 you will need them to pass MOT.

That you :D:D
 
Thor1950 said:
:cheer2::cheer2: they look the same so people called them that and that was the first DPF's and come 2014 you will need them to pass MOT.

That you :D:D
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You guys have loads more knowledge and experience on this subject than a newbie like me, and I take on board what your saying.
But if it is a soot collector, DPF, or exhaust filter of any kind that has little or no relation to an actual catalytic converter, then why are all exhaust systems from every supplier ( including genuine L/R parts) described and sold as cat or non cat? Surely if it is only a soot filter it would be listed as filtered/non filtered. Wouldn't it? If its a cat, its a cat. If its a soot box/its a soot box, and never the twain shall meet.
Also, if its a soot collector or DPF, it would require service/cleaning/replacement or regeneration at regular service intervals and there is absolutely no mention of anything in the owners handbook or any available manual I can find for the early 300tdi.
 
tryhard2 said:
You guys have loads more knowledge and experience on this subject than a newbie like me, and I take on board what your saying.
But if it is a soot collector, DPF, or exhaust filter of any kind that has little or no relation to an actual catalytic converter, then why are all exhaust systems from every supplier ( including genuine L/R parts) described and sold as cat or non cat? Surely if it is only a soot filter it would be listed as filtered/non filtered. Wouldn't it? If its a cat, its a cat. If its a soot box/its a soot box, and never the twain shall meet.
Also, if its a soot collector or DPF, it would require service/cleaning/replacement or regeneration at regular service intervals and there is absolutely no mention of anything in the owners handbook or any available manual I can find for the early 300tdi.
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I took one off a 1995 300tdi Disco and cut it open, it was just a steel mesh wall inside. Its to break up the soot when you boot it. Dont know if later ones had a cat, cant see an unsophisticated engine like 300tdi having a cat.
 
tryhard2 said:
You guys have loads more knowledge and experience on this subject than a newbie like me, and I take on board what your saying.
But if it is a soot collector, DPF, or exhaust filter of any kind that has little or no relation to an actual catalytic converter, then why are all exhaust systems from every supplier ( including genuine L/R parts) described and sold as cat or non cat? Surely if it is only a soot filter it would be listed as filtered/non filtered. Wouldn't it? If its a cat, its a cat. If its a soot box/its a soot box, and never the twain shall meet.
Also, if its a soot collector or DPF, it would require service/cleaning/replacement or regeneration at regular service intervals and there is absolutely no mention of anything in the owners handbook or any available manual I can find for the early 300tdi.
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When is your next MOT? Your question will get answered correctly then
 
Take it off and down to a scrap metal people and u can land up with £75 for it I've had 2 discos both with cats and both passed smoke test with out them one was a m reg and other is 96 on n going in for test number 3 with out it
 
Thor1950 said:
When is your next MOT? Your question will get answered correctly then
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Next MOT not due until august next year, so I shall wait with baited breath for all the new posts on here after the new law takes effect. In the meantime, the cat is coming off to be replaced with a full non-cat system at £58. If it fails the next mot with my user-friendly MOT man then its just a case of buying a new cat system for the test.
 
hodgey2k12 said:
If it's not there can't test it and when u look on microcat it says nothing about cat
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That's because LR don't consider it is an individual replacement part, you have to replace the whole downpipe as an assembly, which is shown in the parts book.
As for "If it's not there can't test it" what test, diesels only have a smoke test.. at the moment.. there isn't a test for a DPF it will only be a visual that the DPF is fitted.

By definition a PDF is a unit that requires 'regeneration' at given intervals which are usually indicated buy the illumination of a dash light something D1s &2s don't have but which todays diesel Disco, RRs have maybe the other LR models as well.
 
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