mmitev

PSzyman, I don't understand this - you have to add it when you have 10 Liters of fuel in the tank? But then the DPF will not regenerate?

Or you have to buy let's say 3 bottles of 100 ml to add to a 30 Liter of fuel in the tank?

pszyman

What I was told the regeneration doesn't have to be taking place at the exact moment this stuff is added. Its supposed to provide some sort of coat over DPF. It helps to burn the soot later, when the regeneration process kicks on. Unfortunately I didn't find any comprehensive info on the web how all this process works. Have not tried this yet but will certainly do it soon. As said before, I don't have any problem with DPF thought. Its just preventive maintenance in my case..

P.S They had also the stuff for injecting straight int DPF. According to them it helps in 70% cases.

gav900

Hi San1

The car is running great, although it did manage to blow off one of the boost hoses! I think it was my fault tho, i may not have clipped it fully home when i had removed it during thermostat replacement.
The dpf seemed to be made of a ceramic type substance which was coated with some sort of metal coating (maybe platinum like catalysts?)...i'm sure a google engineer will jump in a tell us, i can't be bothered searching
My one was deffo choked tho, you could see the soot packed in all the way down the 'veins'. I wish you all the luck with the various fixes in this thread, but for me, not having to worry about short runs/regens etc. is a weight lifted. The car giving more mpg and the astounding increase in performance is just the icing on the cake, go on, get it bypassed...and you too can lift the burden of the dreaded DPF!

LOL

P.S: Car is going in for its MOT soon, we'll see how it gets on in the smoke test!

San1

Thanks Gav. Let us all know about the MOT. I may take the same route and have it deleted.

gav900

San1,

As you have the same engine as i do, could you do me a favour and answer this question. When i replaced my air filter last month i checked the oil separator/breather and found nothing inside the 'box'. No loo roll or the later vortex type were present. I have asked on other forums and been told that BMW stopped fitting them altogether on our M57N2 engines? A vortex could be retrofitted, but would like to see whats in others cars before i do anything. REALOEM only shows the oil separator housing/box for M57N2, whereas older models also depict the vortex element.


Gav

San1

Hi Gav. I checked mine a while ago. There was nothing inside, no loo roll or any filter. I called BMW and the chap there also checked one of the shelf and found nothing inside. Hope this helps. Have you removed your swirl flaps by anychance? I assume you know about this problem and the intake manifold gasket leaking. I blanked mine off.

gav900

Thanks for the information San1. I blanked my swirl flaps off not long after i bought the car using the alloy blanks you can buy off ebay. Its a bit worrying that BMW just gave up on fitting an oil separator in the breather box tho, it must be causing a fair bit of oil in the intake system due to non air/oil separation. This excessive oil will not help dpf's which have to deal with the extra smoke from such oil contamination.
I've been toying with the idea of fitting a Provent 200 to the CCV system to see if that will help matters somewhat....have to find a suppler in the uk first tho...

Gav

mrfivetees

Good Stuff Anzafin! I've cleaned my DPF once, but the blockage has returned, so I don't think the regen is working. I do mostly motorway miles, so running temp is frequently high for long periods - don't understand why regen might not kick in?

Anyway, being a handy kind of guy, I can easily slice the top of the DPF can and remove the innards, then re-seam the can. Question is - what issues will I get with an empty can?

I've never seen any kind of warning light on to show the blockage problem - both times the 530d just went into Limp Mode. Will the engine management object to removing the core of the filter?

I think I must try it anyway, I know I can always get it remapped, if necessary, but I was just wondering if anyone on here has tried emptying the can??

Come on guys, let me know???

gav900

Ahhh, i think you'll find the answers to your questions on pages 6 & 7 of this very thread

thamomo007

Hello everybody,

I post here because, it's the best place for talking about particle filter in the web

i have a 325d from 03/2007 with 68 000km and this model of particle filter :



i have no message errors in DDE, no fault in my car, so diag is good.

-> but with DIS i have seen that the status in DDE, is always in "REGENERATION IN DDE REQUESTED"



So i decided to make a test with DIS, and the exhaust back pressure is good :





Normal, because no warning message.

I always do highway at 110 - 150 km/h, 70km.

So engine hot, exhaust temperature above 240degrés etc ... but i have the impression that the regeneration did not take place.









So my question is :

How do you do for force the regeneration in DIS ? it's in the menu after the SAV fonction where you can test the exhaust back pressure ?
T think, that if i force a regeneration, my DDE status become normal.

Thanks