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[Marks DTM Calib]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Plenty of companies will squirt a magic solution through it for you. But why bother when £200 buys you a cheap replacement?

Is the cheap pattern worth fitting? They say that pattern cats are crap so are pattern DPFs any better?   
I really meant,  was there anything off the shelf you could buy to sort it DIY?

Not that I know of. If you pay £200 for a cheap dpf and it lasts 3 years, I'd say that was ok.

Pattern DPFs seem thus far to be better than pattern cats, the cheaper cats have very little precious metal in them (unlike the OE which has lots.....but then its designed to last ten years and not two) which is where the issues arise, as you get an emissions failure after a few years.

Pattern DPFs tend to have a slightly higher back pressure, but at the end of the days its just a ceramic honeycomb with no overly fancy metals etc

[STEMO]

....

Sadly, the original DPF was probably ok and just needed a regen

Is it possible to do something with a DPF when it's off the car? 

Yes, it is possible to fully clean and de-ash a DPF, its been done for years on commercial vehicles 

.........and its more than just squirting a fluid through, it involves ultrasound, reverse flushing and special solvents

I think Andy meant in his shed 
I already mentioned specialist cleaning companies.

[Raeturbo]

Make a bonfire chuck it in for an hour and it will be ok

[Marks DTM Calib]

Make a bonfire chuck it in for an hour and it will be ok

Nope, the main issue as they mileage goes up is not soot, its ash.

The ash is a consequence of oil burn rather than diesel, hence one of the reasons DPF diesels have special oil, the ash goes nowhere during a heat cycle

[Sir Tigger KC]

Yes, it is possible to fully clean and de-ash a DPF, its been done for years on commercial vehicles 

.........and its more than just squirting a fluid through, it involves ultrasound, reverse flushing and special solvents

Sounds very environmentally friendly! 

[JamesV6CDX]

Sadly, the original DPF was probably ok and just needed a regen

The original DPF was so bad, the engine would barely run / idle, with the downpipe connected. A regeneration, as far as I know, requires the engine to be up to operating temperature, and, with the blocked DPF fitted, it wouldn't run well / long enough to achieve that.

With all that considered, combined with the knowledge it was chucking god knows what into the DPF from the faulty injector / melted piston, I'm still quite happy with my decision to write off the original DPF.

I have a new one coming tomorrow. £207

[JamesV6CDX]

Sadly, the original DPF was probably ok and just needed a regen

The original DPF was so bad, the engine would barely run / idle, with the downpipe connected. A regeneration, as far as I know, requires the engine to be up to operating temperature, and, with the blocked DPF fitted, it wouldn't run well / long enough to achieve that.

With all that considered, combined with the knowledge it was previously chucking god knows what into the DPF from the faulty injector / melted piston, I'm still quite happy with my decision to write off the original DPF.

I have a new one coming tomorrow. £207

Every time I look at the photos of the old pisiton and bore, I'm really chuffed at how well this runs

[JamesV6CDX]

oops, must have pressed the wrong button, only meant to edit. There's an echo in here

[STEMO]

oops, must have pressed the wrong button, only meant to edit. There's an echo in here

It can happen to anyone, James. What's a pisiton? 

[Doctor Gollum]

oops, must have pressed the wrong button, only meant to edit. There's an echo in here

It can happen to anyone, James. What's a pisiton? 

It's a type of kneeling

[JamesV6CDX]

oops, must have pressed the wrong button, only meant to edit. There's an echo in here

It can happen to anyone, James. What's a pisiton? 

Not sure, but sounds like something you'd find in Amsterdam

[Raeturbo]

Tulips?

[JamesV6CDX]

new front to back exhaust, incl DPF, is here now. Hopefully get it fitted tomorrow if I feel a bit better

[STEMO]

Hope it all comes off/goes on easily, James If you're not feeling too good, there's no hurry?

[Field Marshal Dr. Opti]

oops, must have pressed the wrong button, only meant to edit. There's an echo in here

It can happen to anyone, James. What's a pisiton? 

A piston after ten pints of 'wifebeater'