Mud-club
Vehicle & Technical => Discovery => Topic started by: auf_wiedersehen_pet on January 02, 2008, 18:09:36
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Do I need a catalytic converter in my 95 300TDi for the MOT??
The current cat is fine bit the wire mesh on the flexi joint has burst open and looks a real mess. I'm assuming it will fail because of this joint.
:lol:
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Hi Rob, It's not actually a cat, it's a particle collector & you don't need one for the mot. However if it is fitted, it will need to meet the mot standard. Hope this helps.
Jeff
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It's not actually a cat, it's a particle collector
:oops: :oops:
Good news though. I can now fit a standard pipe which I assume will be cheaper.
:P :P
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You can use the front downpipe from a 300 TDi Defender, which doesn't have the flexie bit in it. ;)
ESR2297 (http://www.paddockspares.com/pp/DEFENDER/Exhausts/Front_Pipe_-_90_300TDI_without_Cat_(1995-1997).html)
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Particle collector? On LR? Never! Its a cat - particulate filters were a dream in 95 for production cars - they weren't even viable for commercial vehicles back then!
You dont need it to pass the MoT as its a smoke density/opacity test which the cat cannot affect as it deals with the chemical composition of the exhaust gas which isnt whats being tested. You wont notice much taking it off, paossibly a little less smoke on pulling away/accelerating as te engine 'may' breath a bit easier.........
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even if he wire mesh is riped it wil lstill pass ours did :D or just take it of an put a non cat down pipe on it and middle box replacement pipe and keep back box.
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the simple answer is no
rip it off , loose the EGR , and appreciate the more low down pull it will give you.
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the simple answer is no
rip it off , loose the EGR , and appreciate the more low down pull it will give you.
EGR gone already. Did not notice any difference though. Used a good kit from Cheviot4x4.
http://www.cheviot4x4.com/shop/Vehicles/Discovery/Cat/Performance/Product/300%20Tdi%20EGR%20Blanking%20Kit/
My ex EGR is below......
(http://i244.photobucket.com/albums/gg26/auf_wiedersehen_pet/Odd%20Bits/100_1730.jpg)
(http://i244.photobucket.com/albums/gg26/auf_wiedersehen_pet/Odd%20Bits/100_1733.jpg)
(http://i244.photobucket.com/albums/gg26/auf_wiedersehen_pet/Odd%20Bits/100_1732.jpg)
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Did not notice any difference though.
Before I get any comments, I did reconnect the air filter in the 2nd photo.
:twisted: :twisted: :twisted:
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its not a CAT, its a particulate filter (as advised by my MOT inspector, who is a landy specialist) you can bin it as there is no requirement to keep it, as long as your truck still passes the emissions test in the MOT.
I binned mine at the weekend, and fitted a 300Tdi defender downpipe, i've already binned the EGR and tweaked the fueling slightly... it goes quite nicely now. :grin:
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its not a CAT, its a particulate filter
Sigh, what do I know eh?............
Look at the parts list or the manual and it'll tell you clear as day its a cat. Look on nay of the exhaust suppliers lists - again, its a cat. The main reason for the confusion is the lack of Lambda sensor - its not needed on a diesel as theres no method of altering the ignition map as a result of the feed-back from the sensor - hence the EGR as its the only way to clean things up effectively - its there to cut down on the particulates (and NOx) the the cat cant deal with as thats not its job - if it was a particulate filter there'd be no need for EGR........
But, like I said, what do I know, I've only been fixing the things for 20 years and Mot'ing them for 15............
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Sorry to hijack the thread guys but am i right in thinking that this ESR2297 down pipe from the 300tdi defender will bolt straght on to my 94 300tdi disco then i can lose the cat ;)
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Yeah it will - I think thats the same number I have on mine, (fitted a loooong time ago now), - mine has no flexi-pipe in it, but as long as your exhaust rubbers are in good nick it should be fine.........
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Cheers mate i will get one of them on order next week now for my second question :oops: this one goes to auf wiedersehen pet where did you get your top intercooler hose from it looks nice and tidy ;)
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I've got a nice stainless steel one from Twisted performance - expensive though :shocked:, but it lets you use the existing rubbers or swap them for silicone jobs if you wish..........
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Used a good kit from Cheviot4x4.
http://www.cheviot4x4.com/shop/Vehicles/Discovery/Cat/Performance/Product/300%20Tdi%20EGR%20Blanking%20Kit/
:roll: :roll: :roll:
It was a good price, quick delivery and good value. What more do you need?
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as i was told by rookingham landrovers when i inquired about mine on a m plate the vehicles were type approved with out them they are not required for the mot they only fit them as a after thought for various emission laws in different areas
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as i was told by rookingham landrovers when i inquired about mine on a m plate the vehicles were type approved with out them they are not required for the mot they only fit them as a after thought for various emission laws in different areas
Mines Ex Jap - Rust free and just 48k when I got it! :dance: :dance:
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Just clarify something for me, some of you said you can use the Defender downpipe which has no flexi in it. Doesn't that make the exhaust noisier? I'd assume it's there for a reason (other than inflate the price of spare parts) :?
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The flexi is there to stop the downpipe cracking at the flange where it joins the exhaust manifold because of the vibrations of the engine. That's why you need the exaust mounting rubbers in good condition if you're fitting one, so that these take vibration out of the exhaust instead.
I didn't notice any increase in noise when I fitted mine and as the Defender downpipe is about £25, the Disco one with flexi is £70 and the one with the cat/partical filter is £225 then I'll take my chances with the cheaper one. ;)
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cars up to august 95 can without cat but must be able to pass an emissions test. after then they must be on there. if u don't believe me check with the m.o.t guy at the garage
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well we shall find out on Saturday at my MOT as mine is a june 1996 model, and i binned the CAT last week... after my MOT inspector suggested it.
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cars up to august 95 can without cat but must be able to pass an emissions test. after then they must be on there. if u don't believe me check with the m.o.t guy at the garage
I think you'll find that's petrols only.........
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well, the definative answer is yes, your disco will pass its MOT with the CAT removed.
My 1996 300Tdi passed on saturday, it flew through the emissions test and received no comments from the tester.
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its not a CAT, its a particulate filter
Sigh, what do I know eh?............
Look at the parts list or the manual and it'll tell you clear as day its a cat. Look on nay of the exhaust suppliers lists - again, its a cat. The main reason for the confusion is the lack of Lambda sensor - its not needed on a diesel as theres no method of altering the ignition map as a result of the feed-back from the sensor - hence the EGR as its the only way to clean things up effectively - its there to cut down on the particulates (and NOx) the the cat cant deal with as thats not its job - if it was a particulate filter there'd be no need for EGR........
But, like I said, what do I know, I've only been fixing the things for 20 years and Mot'ing them for 15............
its not a cat, its a particulate filter,
having served my time working on them both as a paid job & also a hobby you can argue the point but its not a cat :police:
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yep, you are correct it is a particulate filter, not a cat, but the guy on here who's been MOTing them for 15 years insists its a cat, and I couldn't be bothered to argue... :rolleyes:
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Do I need a catalytic converter in my 95 300TDi for the MOT??
The current cat is fine bit the wire mesh on the flexi joint has burst open and looks a real mess. I'm assuming it will fail because of this joint.
:lol:
Diesel's dont require cats for emissions tests on MOT, I am a MOT Tester mine is the same and it passed at a differant MOT!! station hope this helps
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Do I need a catalytic converter in my 95 300TDi for the MOT??
The current cat is fine bit the wire mesh on the flexi joint has burst open and looks a real mess. I'm assuming it will fail because of this joint.
:lol:
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yep, you are correct it is a particulate filter, not a cat, but the guy on here who's been MOTing them for 15 years insists its a cat, and I couldn't be bothered to argue... :rolleyes:
For compression ignition (i.e., Diesel) engines, the most commonly used catalytic converter is the diesel oxidation catalyst. The catalyst uses excess O2 (oxygen) in the exhaust gas stream to oxidize CO (Carbon Monoxide) to CO2 (Carbon Dioxide) and HC (hydrocarbons) to H2O (water) and CO2. These converters often reach 90% effectiveness, virtually eliminating diesel odor and helping to reduce visible particulates (soot), however they are incapable of reducing NOx as chemical reactions always occur in the simplest possible way, and the existing O2 in the exhaust gas stream would react first.
To reduce NOx on a compression ignition engine it is necessary to change the exhaust gas - two main technologies are used for this - selective catalytic reduction (SCR) and NOx (NOx) traps (or NOx Adsorbers).
Another issue for diesel engines is particulate (soot). This can be controlled by a soot trap or diesel particulate filter (DPF), as catalytic converters are unable to affect elemental carbon (however they will remove up to 90% of the soluble organic fraction). A clogging soot filter creates a lot of back pressure decreasing engine performance. However, once clogged, the filter goes through a regeneration cycle where diesel fuel is injected directly into the exhaust stream and the soot is burned off. After the soot has been burned off the regeneration cycle stops and injection of diesel fuel stops. This regeneration cycle should not affect performance of the engine.
All major diesel engine manufacturers in the USA (Ford, Caterpillar, Cummins, Volvo, MMC) starting January 1, 2007 are required to have a catalytic converter and a soot filter inline, as per new EPA legislation. http://www.epa.gov/otaq/highway-diesel/regs/2007-heavy-duty-highway.htm
Mmmm, I dont recall seeing the necessary system for this on my 300TDi. LIke I said waaaaay up there - in the days when the 300TDi was launched particle filter technology was in it's infancy and its complications like this that mean that the 300TDi IS fitted with a basic 'Oxidisation' Catalaytic Convertor and not a filter.
Oh and I'm not arguing, I just like to ensure that folk are given the right advice :wink:..............