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Discussion Starter · #1 · (Edited)
This is all the info about the dpf regen, the differant types, the engine temps,exhaust temps and wat fault codes stop a regen happening this is a 5 page pdf sent direct from bmw uk's head office, if the mods see this as good info feel free to make it a sticky as many people are unsure about the regen and there is much speculation about wat needs to be acheived, this confirms and bins many theorys out there and turning theorys in to facts. Hope this helps people understand the regen and wat needs to be done to avoid spending many pennys on costly repairs

https://drive.google.com/file/d/0B2YL3vJm9PNxQ2VuNmlUOVdOY1E/view?usp=docslist_api
If this one dose not display all five then plz try this one

https://www.dropbox.com/s/d94ipd5qv0fs9o0/Doc20151008085826 (2)-7.pdf?dl=0
 

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Saved, that's really helpful. Thanks very much, so nothing about glowplugs or egr thermostats. Could have saved myself some cash there, owell! Just to confirm the "325d or higher" pertains to the 330d engine yes?
 

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Discussion Starter · #3 ·
Yer it dose m8.... did the link open all 5 pages iv been having trouble uploading pdf nd and no glow plugs have no play and egr thermostat dose not alsong as the coolant temp still exceeds 75 degrees c. chears, nick
 
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At last the facts. Thanks mate that is a brilliant document and would have saved me loads of reading and time learning about regens with a laptop on the passenger seat!

Opinions now dispelled

1. Glow plug faults prevent regen
2. Regens only happen at constant speeds above 60
3. You need 10 litres of fuel above the warning light foe a regen
4. Any fault code will prevent regeneration

However what is certainly true is that if a sticking thermostat prevents the coolant temp going above 75c, this will stop a regeneration. I think this is likely to be the biggest cause of a blocked dpf and is something BMW should have put a warning light on the dash for.

So KEEP A REGULAR CHECK OF YOUR COOLANT RUNNING TEMP........
 

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Discussion Starter · #6 ·
Yes maby so i have no idea were they got the info from and not everyone has tis or the info above all the title says is info sent and confirmed by bmw the info could of come from any were you cant always beleive wat u see online hence the meny mis-conseptions about the regen but at least with this this has come direct from bmw and bmw have confirmed that the above document is correct thats all that matters :thumbsup
 

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Discussion Starter · #7 ·
At last the facts. Thanks mate that is a brilliant document and would have saved me loads of reading and time learning about regens with a laptop on the passenger seat!

Opinions now dispelled

1. Glow plug faults prevent regen
2. Regens only happen at constant speeds above 60
3. You need 10 litres of fuel above the warning light foe a regen
4. Any fault code will prevent regeneration

However what is certainly true is that if a sticking thermostat prevents the coolant temp going above 75c, this will stop a regeneration. I think this is likely to be the biggest cause of a blocked dpf and is something BMW should have put a warning light on the dash for.

So KEEP A REGULAR CHECK OF YOUR COOLANT RUNNING TEMP........
Yes m8 it should deffo have a light, mine must have been gone for a long time i have no idea when the last regen was so i am hoping i can get it to regen tomoz on my long drive
 

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i have no lights on the dash board the dpf light has only come on once and that was 6 months ago and turned off after a while since i bought the car last year however there has always been a lot of black smoke coming from my 320d exhaust ? but no dpf light ? the smoke gets really bad sometimes and just dumps a whole load of it sometimes when idle at lights any ideas ?
 

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Discussion Starter · #9 ·
It would seam like the fule mixture is out have u checked for turbo boost leaks or a dogey injector any perfomance issues?
 

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Hi, I've only posted a couple of times on here, so pretty new! I started a topic but have no replies, could either of you guys help please?!

I have a 320i e93, sulphurized catalytic converter.

What I have read is I need to drive the car at speeds greater than 68 mph for 25+ mins with more than ½ tank of fuel and the regen should happen automatically during that period. Do I have to stay above 68mph for the full 25 mins?! I tried doing this at the weekend but had to slow down a couple of times for traffic. If so I shall have to try again late at night when no cars are on the motorway! Also is there a way of finding out if it has worked? Thanks!
 

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Hi, I've only posted a couple of times on here, so pretty new! I started a topic but have no replies, could either of you guys help please?!

I have a 320i e93, sulphurized catalytic converter.

What I have read is I need to drive the car at speeds greater than 68 mph for 25+ mins with more than ½ tank of fuel and the regen should happen automatically during that period. Do I have to stay above 68mph for the full 25 mins?! I tried doing this at the weekend but had to slow down a couple of times for traffic. If so I shall have to try again late at night when no cars are on the motorway! Also is there a way of finding out if it has worked? Thanks!
Diesel particle filter (DPF) and NOx cat on petrol engine are two totally different things.
 

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Hi, I've only posted a couple of times on here, so pretty new! I started a topic but have no replies, could either of you guys help please?!

I have a 320i e93, sulphurized catalytic converter.

What I have read is I need to drive the car at speeds greater than 68 mph for 25+ mins with more than ½ tank of fuel and the regen should happen automatically during that period. Do I have to stay above 68mph for the full 25 mins?! I tried doing this at the weekend but had to slow down a couple of times for traffic. If so I shall have to try again late at night when no cars are on the motorway! Also is there a way of finding out if it has worked? Thanks!
Diesel particle filter (DPF) and NOx cat on petrol engine are two totally different things.
Yes I know! But thought someone may still have an answer for me.
 

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Discussion Starter · #13 ·
Its all on the form above m8 u need speed grater than 38 and optimum speed is 60 mph but aslong as u dont drop below 38 mph and ur fuel light isnt on it will regen u dont need half a tank off fuel or stay above 68mph can u imagine the insurance claim on that .... why didnt u slow down? Well u see my regen was taking place sir ��
 

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Discussion Starter · #14 ·
Oh read it wrong lol dont know about a cat but tbh would of thought u wont need to maintain such a high speed
 

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I can't see that it would hurt the turbo, but certainly it would slow it down!
Also if the DPF got completely blocked, it would choke the engine to a standstill!

Anyway, here's another source re DPF regeneration, it seems to be the same doc as the 2nd part of the op's links, just clearer to read :) (& different place, incase the op's links go dead).
 

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Just joined and came across this post which reminded me of a 2008 (58) 330D manual I had:
At about 130k miles I got DPF warning. There was no loss of performance and I was doing motorway miles but had read loads about regen but it never seemed to happen. I went to BM and had a chat and they said it was quite high mileage, so would probably need a new DPF at around £2k + fitting + VAT. As the car was worth less than £8k at that point, a near £4k bill seemed a bit steep. When I said this, the bloke asked if it was losing power ever and suggested if not, I shouldn't worry about it. I didn't but kept asking around and apart from remove it and remap, didn't have any other suggestions. Long story short, thinking about selling it and now at 180k+ miles, I got an RAC friend to try a forced regen on his new laptop and that still didn't work but he suggested taking it to a mate of his who specialised in BM's. Within 5 minutes, he'd told me the timing chain was starting to rattle a tiny bit, so might want to get it done at some point and I could go. - He'd checked all of the pressures and readings and as they were perfect, he simply reset the End Of Life setting that BMW had programmed in on the DPF!
 

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If regen warning is on the car will NOT regen (it's a BMW thing, I know it's NUTS!!!) clear dpf warning with a fault code reader then go for a regen drive hey presto job done!
 
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