Dpf removal on used motors

[Teutone]

So what was the probe doing in my van's exhaust pipe at MOT time? My van is a 2.2hdi boxer 2003 and is not fitted with either filter.

you still have to pass the smoke test. But your engine is not tested to Euro 4 or 5 which allows less particles because of the DPF.
Euro3 = 0.05PM
Euro4 = 0.025PM
Euro5 = 0.005PM

 

[jonkil]

Nothing to do with emissions, it's a visual check only.

Visually there is no difference !
DPF casing still there, just got no inards anymore.
Pressure sensors still there, exactly the same as they always were.
Only difference is that the ECU is mapped to never regen and to ignore plausible signals from transducers.
Emissions still 100% right, or your money back.
If its done properly then it is perfect.
My biggest customer is my local Vauxhall dealership !

 

[Teutone]

Yes you do. There is a change to the MoT requiring that if a DPF or Catalytic converter was fitted from new, then it has to be fitted. A lack of either is a fail. Nothing to do with emissions, it's a visual check only.

Section 7.1 of the MoT Inspection manual:

3. On spark ignition engine vehicles that qualify for
a full catalyst emissions test and all
compression ignition vehicles check the
presence of catalytic converter(s) and
particulate filter(s).

Reason for Rejection

3. A catalytic converter or particulate filter missing
where one was fitted as standard.

The documentation is here: MOT Documentation Contents Page

It's always been illegal to remove them, or technically to use a vehicle without them fitted but it amounts to the same - the vehicle was type approved with all the emission control devices and removing any of them means that it no longer complies. The only change is that it'll fail the MoT before it's impounded. Not that I've ever heard of that happening but it can.

Agreed that the DPF is a pain though, especially if you do lots of short journeys.

There you go, already in place! Thanks for the clarification.

 

[richardstubbs]

Visually there is no difference !
DPF casing still there, just got no inards anymore.
Pressure sensors still there, exactly the same as they always were.
Only difference is that the ECU is mapped to never regen and to ignore plausible signals from transducers.
Emissions still 100% right, or your money back.
If its done properly then it is perfect.
My biggest customer is my local Vauxhall dealership !

Exactly, so it'll pass. Cutting it out, as many have done, will now fail. Still technically illegal to drive, and in theory they could cut it open to have a look, but they'd need very good reason.

One day there'll be a particulates test though, quote:

The European Commission is looking at new testing equipment for the future to test for smaller particulate matter and oxides of nitrogen.

This is for HGVs, from here: https://movingon.blog.gov.uk/2013/10/21/simplifying-the-heavy-vehicle-test/ but it will happen for class IV eventually.

Hopefully it's a long time coming, although it's not difficult in an engineering sense. I prefer to keep my vehicles legal, to save future problems, but maybe I'm weird. Anyway my current camper is a petrol. The car's a diesel - er, maybe I've got that wrong somehow