Diesel particulate filter fitted or not?

kato Disco · May 13, 2013

How would you know if your car has a DPF fitted. I have read that all 2010 onwards cars have them as standard but mine is a 2008 RRS when they were fitted as an option to UK cars. Any DPF gurus out there?

Bump · May 13, 2013

I would assume they have one fitted... they put them on 300tdi's so they're going to have put them on 2008 RRS.

kato Disco · May 14, 2013

Cheers for that

Dr_evil · May 14, 2013

You could always look

Mr Noisy · May 14, 2013

DPF on a 300tdi?! WTF?!

Best option with DPF is to ring a main dealer, speak to parts department, quote chassis number and ask if vehicle has DPF fitted.

2008 Jaguar 2.7 TDV6s have DPF and maybe 2007, RRS went EURO4 on 07MY so could have fitted DPF then, often easiest way is to look for DPF pressure sensor in engine bay that looks like this

Because DPF units are often confused with cats, but ideally just ring your dealer and ask!

Dr_evil · May 14, 2013

DPF is the derv version of cats, just sit in downpipe

Mr Noisy · May 14, 2013

Incorrect

Thor1950 · May 14, 2013

op2::beer2::lol::lol:

Dr_evil · May 14, 2013

Mr Noisy said:
Incorrect

How so ?

It sits where the cat would be if it was a petrol and just does what it says on the tin, filters the particulates i.e. harmful soot etc

Thor1950 · May 14, 2013

Dr_evil said:
How so ?

It sits where the cat would be if it was a petrol and just does what it says on the tin, filters the particulates i.e. harmful soot etc

could be how you wrote your reply?

kato Disco · May 14, 2013

I think a call to the dealers is the best option, thanks.

Dr_evil · May 14, 2013

Thor1950 said:
could be how you wrote your reply?

Possibly but it is the derv equivalent of a cat though which is what I said, dervs don't have cats they have a DPF which does a similar job i.e. attempts to reduce harmful emissions into the atmosphere

Thor1950 · May 14, 2013

kato Disco said:
I think a call to the dealers is the best option, thanks.

money says you do

Thor1950 · May 14, 2013

Dr_evil said:
DPF is the derv version of cats, just sit in downpipe

Dr_evil said:
Possibly but it is the derv equivalent of a cat though which is what I said, dervs don't have cats they have a DPF which does a similar job i.e. attempts to reduce harmful emissions into the atmosphere

you make it sound like it is in the down pipe. Should be inline on the down pipe/exhaust system.

But I didn't say a thing

Just waiting to see what Nosiey says next

Dr_evil · May 14, 2013

Thor1950 said:
you make it sound like it is in the down pipe. Should be inline on the down pipe/exhaust system.

But I didn't say a thingJust waiting to see what Nosiey says next

fair enough

and I know you haven't

Anyway I'm off to bed, gonna see if I can find some 7018's tomorrow and then store them by the boiler so they stay dry and "warm-ish"

Night guys

Mr Noisy · May 14, 2013

Mornin

Yeah a DPF is a different thing to a cat, it doesn't attempt to convert any gases, it simply stores solid particles and provides a surface for them to be combusted when EGTs are purposefully raised.

All uk vehicles manufactured after 1992 are fitted with cats, and did you know that a DPF regeneration using the over-fueling method actually relies on the catalytic converter?

Basically the PCM initiates a regeneration cycle and over fuels, this causes the cat to become extremely hot, temps over 600c are required, and it is this raise in EGT before the DPF that causes the soot to be burnt in the DPF.

So there

Jongould · May 14, 2013

Mr Noisy said:
Mornin

Yeah a DPF is a different thing to a cat, it doesn't attempt to convert any gases, it simply stores solid particles and provides a surface for them to be combusted when EGTs are purposefully raised.

All uk vehicles manufactured after 1992 are fitted with cats, and did you know that a DPF regeneration using the over-fueling method actually relies on the catalytic converter?

Basically the PCM initiates a regeneration cycle and over fuels, this causes the cat to become extremely hot, temps over 600c are required, and it is this raise in EGT before the DPF that causes the soot to be burnt in the DPF.

So there

This /\ /\ /\

DPF and a cat is 2 different things, a diesel cat is still a cat, it works by having a heat retaining surface (usually ceramic) which remains at a higher than exhaust gas temperature, this acts as a catalyst and helps to burn off unburnt hydrocarbons making a cleaner exhaust gas, the DPF is as above, it captures particulates, goes through a regen and with some manufacturers it has an additive added which aids in its operation (and costs about £300 to refill!!)

Mr Noisy · May 14, 2013

Yeah that's the AdBlue stuff, not 100% sure on its purpose but basically DPF regen is by using over fueling or AdBlue, which I think is simply sprayed into the exhaust.

As it happens the DPF is actually a very good, fairly simple and worthwhile idea FOR A VEHICLE WHICH IS USED SUITABLY

the big problem that manufactures/the EU/whatever decided not to tell us is that correct DPF drive cycle is actually very difficult to maintain, ie driving down the motorway in 4th gear, nobody does this regularly.

at best your car will force itself to regen more often (using more fuel where the whole point of these modern cars is super efficiency) or at worst requiring a replacement filter after self regen has failed to clear a buildup of soot over several attempted regen cycles.

Get a petrol, modern ones aren't even bad on fuel and so much simpler than diesels.

Jongould · May 14, 2013

Mr Noisy said:
Get a petrol, modern ones aren't even bad on fuel and so much simpler than diesels.

QFT

Modern diesels, whilst very efficient, are fooking expensive when they go wrong and they go really wrong. The slightest bit of **** in the fuel and its new pump/injectors/fuel lines at a rough cost of £2K and that's a common issue, high pressure pumps at £600-1000 a pop, even the servicing is expensive with plenty of fuel filters now costing £50+ a time!!

IF you are doing 40K+ a year then it makes sense, if you are driving to the school each day then it really doesn't, diesels hate small, short journeys!

oldskool · May 14, 2013

The vehicles that use the additive actually inject it into the fuel tank when the fuel flap is opened, where the fuel pick up is, this is generaly found on french cars and fords that use the french engine's, generally earlier models 55 plate's. on these models the soot is burnt down to ash which allows the DPF to hold more, these DPF's are supposed to be replaced at 75,000 miles.

Diesel particulate filter fitted or not?

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