New Mot Rules for 2014

[markw]

It was purely from the MOT standpoint Jon. The rules do state that anti pollution equipment must not be interfered with and although I've yet to hear of any failure due to straight pies being in place, I decided to 'cover' myself and put the empty can set on.
Paranoid?.....probably!

[jonsowman]

I'd probably have done the same in your position Mark

[lozz]

You might have to find lenient mot testers.

you can tell if a cat is aempty case by just giving it a tap with metal object.
ithinks that's how they will check,

[Sonia406]

I'm so glad someone posted this on the forum, I shared a news article yesterday on ''the book'' about this..

I'm also so glad that a few weeks ago a couple of you put me off my 'straight through exhaust' ideas and I kept the DPF canister..

I also agree, an MOT should most probably be a visual check, is DPF there, yes I can see it - pass.
However, and I know for a fact a lot of people have done a straight through exhaust are going to be absolutely screwed...

Is there anything they can do, similar to the petrol emissions to check the functionality of the DPF?

[trem1]

Can't you just put a heatshield over/under where the DPF is meant to be ?? After all i get advisories for the undershield/plastic engine covers saying because they're there elements cant be checked

[Welly]

Just spoken to the new MOT man next door here, they are allowed to 'tap' the DPF and listen to the resonance using a stethoscope......if the resultant noise sounds like "no-one's in" then the system is ordered to be removed and inspected, the Police are called and your local MP gets flown in from abroad whilst you are held under caution.

Not really, he said the only have to do a 'visual' on the DPF housing (assuming therefore that the filter is present). They are also not able to tell whether a car should have a DPF, in other words; if it's there then it's a DPF equipped car, if it's not it's not, although I guess an obviously butchered by-pass might be an issue.

[lozz]

Ithink it will be an age before all this new rules kicks in,

people are still getting through test with black tape over airbag ilum bulb. (Hand bribe to mot tester,some prefair bells whisky)

ithink trem has the right idea with heat shield. weld one of them on and then they carnt have a good listen if theres owt inside dpf box.

it is illegal to remove dpf you shouidnts be doing it its only buses that are allowed to palute the ozone with diesel stench

reminds me imust throw some more tyres on my coal fire im getting cold

[rwb]

...must throw some more tyres on my coal fire...

Now there's an idea: one of those wood burning stove things that are really popular but that burns tyres.

you can tell if a cat is aempty case by just giving it a tap with metal object.
ithinks that's how they will check

Could you just smash a hole through the middle of the fap and leave the element round the edges? Would that be enough to sound like it was still full of rubbish?

The V6 guys have been removing the elements from their cats for years, and none of them fail the MOT. This is exactly the same. I think they're just bringing the FAP regulations in line with the cat ones.

As long as it passes the emissions test and there's a visual check that the FAP is there, I reckon this is all that will be required.

Isn't it the pre-cats they remove? I believe that a petrol engine without a cat will fail it's emissions test.
For diesels the emissions test is much simpler -- it's just a smoke test -- and the government's problem is that diesels are clean enough now to pass this test without a cat or a fap.

Making more efficient engines is good; we all want to spend less on diesel.
Taxing emissions is perverted beause it's a tax on the symptom and not the cause (and we already have tax on fuel).

[jonsowman]

I'm sure Mark will correct me if I'm wrong, but it believe it's the post cats that get removed. They still pass the MOT because the cars are tested under Euro III.

[lozz]

Could you just smash a hole through the middle of the fap and leave the element round the edges? Would that be enough to sound like it was still full of rubbish?


no just put astraight pipe through empty dpf box and fill the space with concrete.

sorted

[trem1]

So how does the Mot tester know if the car is meant to have a Dpf Fitted as standard??
Take my old 407 and a buddy's from another forum

Mine: 2004 2.0 Hdi Se saloon in Iron Grey with Dpf.
Buddy's : 2004 2.0 Hdi Zenith saloon in Iron Grey without Dpf.

this is how they both left the factory, how is the tester supposed to remember what model has Dpf fitted as standard and which doesnt

[Welly]

So how does the Mot tester know if the car is meant to have a Dpf Fitted as standard??
Take my old 407 and a buddy's from another forum

Mine: 2004 2.0 Hdi Se saloon in Iron Grey with Dpf.
Buddy's : 2004 2.0 Hdi Zenith saloon in Iron Grey without Dpf.

this is how they both left the factory, how is the tester supposed to remember what model has Dpf fitted as standard and which doesnt

They don't need to know anything, I just asked the MOT guy today, if a car has one fitted then it's 'equipped' with one, if it hasn't (or there's no evidence of a dpf at all) then look no further.

[trem1]

so rather than fit a straight through pipe, fit the exhaust from a model that didnt have one

[DaiRees]

They have to "log it on" to the computer for the test, using the VIN rather that the reg number I assume, so surely the database will know how it left the factory?

[markw]

I'm sure Mark will correct me if I'm wrong, but it believe it's the post cats that get removed. They still pass the MOT because the cars are tested under Euro III.

Exactly that Jon!
The J4S V6 engine has 4 cats in it's unmolested form. It's the 2 at the rear that get removed.
The J4 V6 is a different beast though. It only has one cat fitted at the point where the 2 individual manifold pipes join into one. A decat on this engine would almost certainly mean a fail on emissions, quite apart from the fact that the cat is missing in the first place.