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      10-15-2013, 11:34 AM   #1
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Understanding Diesel DPF Regeneration

I came across this and I came to understand this DAMN DPF, here's the link(sorry did not know it was an AMSOIL link until I saw it completely,but to post):

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      10-15-2013, 11:56 AM   #2
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Great video, do we have the differential pressure sensors in the US 335d?
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      10-15-2013, 12:02 PM   #3
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Great vid man, thanks for posting.

Always good to have more information.

So it this also a plug for the additive that you use
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      10-15-2013, 12:27 PM   #4
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Originally Posted by Quasimodem View Post
Great video, do we have the differential pressure sensors in the US 335d?
Yes. My car is at the dealer now for that. They are waiting for an exhaust pressure sensor to arrive. As usual, this is not a part that is available locally.
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      10-15-2013, 12:40 PM   #5
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Great video, do we have the differential pressure sensors in the US 335d?
Yes. My car is at the dealer now for that. They are waiting for an exhaust pressure sensor to arrive. As usual, this is not a part that is available locally.
I do not think there is a differential sensor in US 335d
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      10-15-2013, 12:52 PM   #6
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now that i know how it works I will do as I did with my catalic converter on a car i had gut it out hopefully
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      10-15-2013, 12:54 PM   #7
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I do not think there is a differential sensor in US 335d
there is, that is how the DDE knows to initiate a DPF regen supposedly

http://realoem.com/bmw/showparts.do?...87&hg=13&fg=15
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      10-15-2013, 12:59 PM   #8
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now that i know how it works I will do as I did with my catalic converter on a car i had gut it out hopefully
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      10-15-2013, 02:12 PM   #9
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now that i know how it works I will do as I did with my catalic converter on a car i had gut it out hopefully
after getting the sensors and regen tuned out?
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      10-15-2013, 03:45 PM   #10
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Quote:
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I do not think there is a differential sensor in US 335d
there is, that is how the DDE knows to initiate a DPF regen supposedly

http://realoem.com/bmw/showparts.do?...87&hg=13&fg=15
I remember reading there being something different along these lines between US and EU In the diesel tech workbook. Just cant remember. Ill try to find.
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      10-15-2013, 04:21 PM   #11
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I remember reading there being something different along these lines between US and EU In the diesel tech workbook. Just cant remember. Ill try to find.
there is a difference in the systems according to realOEM, but it may be that the euro spec does not have a differential pressure sensor. The link I posted was US spec. Below is euro spec.

http://realoem.com/bmw/showparts.do?...72&hg=18&fg=10
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      10-15-2013, 08:12 PM   #12
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Thanks for this. Knowledge is power (I guess).
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      10-15-2013, 08:18 PM   #13
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Found it (pg 113)

http://prodcds.bmwuniversity.com/lib...erformance.pdf

Euro 335d has backstream pressure sensor UPSTREAM of DPF...

I remembered this because it may have prevented Ron1n's meltdown.
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      10-16-2013, 04:50 AM   #14
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This video has salesmanship all over it.

He makes a few statements that are low on data, stretching the truth, and to my limited knowledge, appear to be false.

One example: at the start of the talk, oil gets degraded by going down in viscosity. Later in the talk, soot makes it "thicker."

Another: long drain intervals are bad if you have EGR putting "soot" into the oil through the combustion chamber. If EGR puts a lot more soot into the oil from the combustion chamber, think of all the soot combustion puts into the oil in the first place! Illogical! Many check their oil periodically for quality and drain intervals and clearly the high end oils recommended can withstand long drain intervals.

Another was where he said that separate combustion process to clear the DPF with some designs causing oil contamination in the engine. This process is far away from the engine and has nothing to do with fuel contamination of the engine oil.

Amsoil makes good products, but this was a sales pitch.

I don't believe this guy is an engineer, and he may not even be a mechanic.
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      10-16-2013, 06:12 AM   #15
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Originally Posted by Pierre Louis View Post
This video has salesmanship all over it.

He makes a few statements that are low on data, stretching the truth, and to my limited knowledge, appear to be false.

One example: at the start of the talk, oil gets degraded by going down in viscosity. Later in the talk, soot makes it "thicker."

Another: long drain intervals are bad if you have EGR putting "soot" into the oil through the combustion chamber. If EGR puts a lot more soot into the oil from the combustion chamber, think of all the soot combustion puts into the oil in the first place! Illogical! Many check their oil periodically for quality and drain intervals and clearly the high end oils recommended can withstand long drain intervals.

Another was where he said that separate combustion process to clear the DPF with some designs causing oil contamination in the engine. This process is far away from the engine and has nothing to do with fuel contamination of the engine oil.

Amsoil makes good products, but this was a sales pitch.

I don't believe this guy is an engineer, and he may not even be a mechanic.
I just hate facts getting in the way of a good story. Just like the US political scene. Whoops.
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      10-16-2013, 07:35 AM   #16
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business like or not at least we or should I say i understand how this DPF works!! yes thre was some sales pitch BUT some truth to it,

Hooper I will confer with Lenny on this when we do the DPF delete in nearby future ok!!
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      10-16-2013, 08:07 AM   #17
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Speaking about Ron1n wtf is he?
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      10-16-2013, 12:55 PM   #18
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IMHO, he exaggerates the EGR/soot problem, but it makes sense that there is more soot in recirculated diesel gasses than in petrol gasses.

The real problem is leakdown of diesel through the cylinders since diesel is more persistent than petrol. But then again, diesel is an oil, so presumably adding a little to the oil system wouldn't be so bad.
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      10-16-2013, 01:37 PM   #19
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Speaking about Ron1n wtf is he?
Good question.
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      10-16-2013, 05:26 PM   #20
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I saw this video the other day...I started to debate if I should be changing my oil every 6k or let the car computer (CBS) tell me, which sort of works out to 11k...

I would like to think the car's sensor is testing the viscosity of the oil by doing a dielectric strength test on it, and it is not just based on driving style, etc.
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      10-16-2013, 09:39 PM   #21
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I saw this video the other day...I started to debate if I should be changing my oil every 6k or let the car computer (CBS) tell me, which sort of works out to 11k...

I would like to think the car's sensor is testing the viscosity of the oil by doing a dielectric strength test on it, and it is not just based on driving style, etc.
Dunno.

If it doesn't, it may just be on miles driven (seems to be how mine is). Would then depend on whether it goes through "heavy duty use" or not.

Oil analysis (SOA) done by many online seems to indicate diesels do well with specified oil at extended drain intervals.
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      10-16-2013, 10:37 PM   #22
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Quote:
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Dunno.

If it doesn't, it may just be on miles driven (seems to be how mine is). Would then depend on whether it goes through "heavy duty use" or not.

Oil analysis (SOA) done by many online seems to indicate diesels do well with specified oil at extended drain intervals.
You'd be better off changing the fuel filter sooner than later.
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