Diesel Particulate Filter

Trebor16 wrote: »

The trouble is more and more diesels are being fitted with them.

Indeed but not everyone elses system fills the sump with fuel causing diluted engine oil to rise in level causing only rapid engine bearing wear if you're lucky, and a completely destroyed engine of you're not, and the best bit is it's the owners fault...nice one.

I've had at least one Diesel in my stable since the early 80's, when one of my current cars which is Diesel reaches the end of its useful life it is most unlikely it will be replaced with another unless its an oldie...then you have the worry did the previous owner decide to run it on home brew muck and thats now on its last legs too...;)

flyingscotno1 wrote: »

I remember seeing on the M77 a car- not sure what make as couldn't see it, on the hard shoulder white smoke everywhere drifting across the road. I was down to 5 mph crawling past! It seemed very much like a diesel munching on its own oil to me.

TO be fair, that could be any one of a number of failures, not many of which are down to DPFs

But the more I read about DPF's, the more scared I am of them! Looks like petrol will be the way forwards for second hand cars in my future. Just a sahme 90% of everything are diesels now, as everyones been ocnvinced that they MUST have a diesel.

When the DPF blew in my car, I was advised by the mechanic to have a new one as "you're not supposed to take them out". A bit of digging proved him correct as on one forum someone has posted a reply from Vosa saying you can't remove them as it is against Construction and Use (it may increase emissions) even where the ECU is reprogrammed (sorry I didn't keep the link).

However, not being able to get hold of one from a scrappy, and at 600 notes for a new one plus fitting, a return trip to the mechanic resulted in a more reasonable amount of cash changing hands (20 quid) for which he took out the core and welded the unit back together. Apparently he will also get a few quid for the core as it was made from precious metals. As for the C&U stuff? For 600 nicker I'll take the chance. They aren't likely to find out.

As far as I know diesel engined cars do not require a DPF or catalytic converter by law. Manufacturers just fit them for emissions reasons - at the end of the day you end up paying less tax on the car, which makes it more appealing to potential buyers.

I had the catalytic converter removed from my old diesel Peugeot, and a straight piece of exhaust pipe welded in its place. It went through 2 MOT's fine like that.

Petrol cars after 1993(?) I believe must have a catalytic converter.

My current car has a DPF too, it hasn't been into regeneration yet but I am advised that the best thing to do when it is, is to take it up the dual carriageway at 70mph in 4th gear for a bit to clear it.

taffy056 wrote: »

Hiya guys,

I have a Mazda 6 turbo diesel and the DPF light and management light has come on, its a high miler 85k on a 57 plate, I have run over it 2000 rpm for quite a few miles and its not cleared with regeneration, and was wondering my next step with this.

I was thinking of having it taken out and the ecu reprogrammed , but its expensive at about £500 , there are quite a few people selling snakeoil that claims all sort of things. The garages are saying thousands to replace the thing.

Anyone got an alternative ? Thanks and Happy Christmas

But a new DPF would only cost you about four hundred pounds.