kato Disco
Well-Known Member
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?
kato Disco
Well-Known Member
Cheers for that
Mr Noisy
Coming in your ears.
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!
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
Banned
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
Well-Known Member
I think a call to the dealers is the best option, thanks.
Dr_evil
Banned
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
Banned
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
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
Coming in your ears.
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
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
New Member
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
Coming in your ears.
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.
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
New Member
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
Well-Known Member
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.
