DPF cleaning, BLS engine

Hello,
After my G5, with a BLS engine producing 105 horsepower and having 240,000 kilometers on the odometer, reported a carbon buildup of 58 grams, I decided to have it cleaned.
Connect 2 x 3/4 inch hoses (due to higher flow rate) to the outlet, then flush for about 2 hours. After 15 minutes, when I didn't see much coming out, I tapped gently with a small rubber hammer to help loosen the ash. This resulted in nice, small "pellets" coming out. No, not ceramic or anything like that; when I tried to grab the pieces, they were already gone. And with the rubber mallet, I didn't knock more than the PD would normally do .
I set the ash mass to 10g and then took a logarithm. Unfortunately, I only just realized that I didn't quite follow the instructions in that case.
"However, it would be really helpful if someone could comment on whether all of this seems plausible."
The DPF (Diesel Particulate Filter) has been completely normal so far, only regenerating every 390km without me noticing. During the test drives, which covered approximately 30 kilometers of federal highway, the load fluctuated between 10.7% and 9.1% - 9.9%. (I managed to deal with the rapid increase to 10% when, during the first test drive, the turbocharger boost hose came loose, and it took some time for me to figure out what was happening.)

Best regards.
Andreas.

Hello,

Thank you for your report. The free length of the channels in the DPF can be checked with a long wire, if possible.
See dpf_freie_länge_kanal_druckseite.jpg in /viewtopic.php?t=24243.

Regarding the differential pressure: It seems a bit high for the engine, even though it has been "freshly cleaned."
RedR32 BLS had approximately 165 mbar after "DPF roughly cleaned, 175,000 km".
Okay, I understand. Please provide the German text you want me to translate into English. I will only provide the translation.

It's a shame you didn't do a before-and-after measurement and upload it to the forum thread you originally used (which is specifically intended for that purpose).
We just don't know anything about the success of the campaign...

Best regards, Rainer.

Hello,

Quote:

It's a shame you didn't do a before-and-after measurement and upload it to the forum thread you initially used (which is specifically designed for that purpose).

I unfortunately missed that, despite reading the forum extensively - I couldn't see the forest for the trees. I'm angry at myself.

The wire test yielded inconclusive results. Before cleaning, I could fit about 1/3 of the material in, and then 2/3 after cleaning. The wire was also very thin and flexible, so I don't put much weight on that.

As I mentioned, the DPF functioned perfectly during the 50,000 km I drove, even in cold weather and short-distance driving conditions.
Before buying, I was looking for a G 5 without a DPF. The previous owner assured me that the vehicle didn't have anything like that installed. He bought the car new directly from VW due to time constraints and used it primarily for commuting between the Harz region and Lake Constance. All inspections and maintenance were carried out at VW. As far as I could tell, the 507 oil wasn't used, because even VW assumed it was "without DPF" - which is really weak, especially when you see the invoices.
Perhaps the filter didn't become completely clear because more ash fell on it, or because the ash had a more solid consistency.
But that's just some extra information, as there's nothing I can change about it anyway.

Is it now advisable to increase the ash content, perhaps to 20g, since the cleaning process wasn't very effective?

Sincerely,
Andreas.

Quote:

Would it now be advisable to perhaps increase the ash content to 20g, since the cleaning wasn't very good?

Well, it's no longer possible to determine how good she was. Finally, you have nothing to compare it to, compared to "before".

What color were the crumbs? Was ist die Übersetzung von "Wurde direkt vor dem DPF-Ausbau eine Regeneration durchgeführt und der Motor direkt danach abgestellt und der Filter ausgebaut?" ins Englische?

Yes, I performed the regeneration process until 0% and then proceeded to the stage.
The crumbs were a light beige color. However, I couldn't pick them up between my fingers because they dissolved immediately. I believe it was solidified ash that corresponded to the diameter of the filter tubes.

I've compared the "BLS roughly cleaned" log with different speeds again, and I'm seeing approximately a 25% higher resistance. Hmm...
I would be satisfied if we could easily handle another 100,000 to 150,000 units.

I just realized that I could probably convince a friend with a car that has BLS and around 160,000 km to join me on a test drive so I can have a comparison.

Best regards.
Andreas.

Quote:

I could try to convince a friend who owns a BLS model with approximately 160,000 km to participate in a test drive for comparison purposes.

Is the...
http://www.spritmonitor.de/de/detailansicht/354700.html
Sure, go ahead.

"What does 'logge' mean?"

Greetings.
m;

Quote:

...but not using the 507 oil, as VW also assumed "without DPF" - really weak, especially when you see the invoices. Perhaps the filter didn't become completely free because more ash fell into it, or because this ash has a more solid consistency.

It went wrong. Low-ash oil has its purpose in vehicles with DPFs.

So far, I have only cleaned DPFs myself, and in those cases, I haven't seen any chunks, but rather a reddish-brown sludge. The filter tubes were completely clear again afterwards.

Best regards, Rainer.

Quote:

Is the

Is that also OK?

Quote:

Yes, please do. Maybe I can generate an ash loading pressure differential characteristic curve. The logs that have already been published here are mostly for 2.0 TDI engines, which aren't very useful for me.

"What does 'logge' mean?"

Quote:

Engine speed and pressure difference at full throttle: 1500-4000 RPM. Loading coefficient, ash content, and mileage are still important factors.

So far, I have only cleaned my own DPFs, and in those cases, I haven't seen any chunks, but rather a reddish-brown sludge.http://www.spritmonitor.de/de/detailansicht/354700.html
I also expected it to be like what I've seen in YouTube videos or what's common with oil boilers.
No, just light floating particles like dust or ash at first, and then add a little help to get those "pellets" going.
In the picture, you can see a few particles that settled at the bottom, which I obviously flushed out at the end.

Hello,
So, regarding the trip with the aforementioned BLS engine, which has 140,000 km, the following was observed at 4000 RPM: a differential pressure of 163 mbar. "So, like with 'BLS roughly cleaned'."
Ash content: 36g. Last regeneration: 110km ago. Soot load: 0%. Is it possible to have 0% battery after 110 km?
Perhaps I will also force mine to 0% and then measure it again.

Best regards.
Andreas.

Okay,
slight relief.
It looks a bit better now that the filter has been reset to 0%.
A maximum pressure difference of 183 mbar is already quite acceptable. Also, the load remained at 0% during a 25 km drive after that. I will continue to monitor it.

Best regards,
Andreas

@98er_alh: It's doable, but it's a shame about all the effort involved... the question is whether the DPF could have been cleaned any better due to the incorrect engine oil.

Quote:

Is it possible to have 0% battery after 110km?

If I remember correctly, the BLS engine typically uses relatively long injection times and high exhaust gas temperatures, at least compared to other TDIs. You can view both of these in the measurement blocks of the engine control unit.
The high exhaust gas temperatures promote self-regeneration during normal operation (passive regeneration).

Best regards, Rainer.

Quote:

It's okay, but it's a shame about all the effort... the question is whether the DPF could have been cleaned better, due to the incorrect engine oil.

Sure - I will observe and explore options for a suitable filter with verifiable history. Isn't it the case that you only need half the time for the replacement the second time around?
Right now, I'm not under any pressure to act immediately, but I've already managed to make a few kilometers of progress with my initiative.

Best regards,
Andreas

Hi.

(1) YES, the BLS is a regeneration-SAVING device.
At the beginning of my measurement run, I was surprised by the 800 degrees Celsius exhaust temperature I saw in my peripheral vision... however, it was apparently NOT in a regulated state.

Code:

167748km 00:24:08 Block 068: Partikelfilter (Abgaswerte II)   0.0 %  Beladungs- koeffizient   35.0  Aschemasse   0.0 %  Aschelernwert         00:24:08 Block 073: Partikelfilter (Fahrzeugdaten)   20.3 l  Verbrauch seit Regeneration   370 km  Strecke seit Regeneration   516.0  Zeit seit Regeneration

On my way to my starting point (which was supposed to be a yaw angle log), I took a quick look again.
Please note: 3 km further down the road!

Code:

167751km 00:27:56 Block 068: Partikelfilter (Abgaswerte II)   0.0 %  Beladungs- koeffizient   35.0  Aschemasse   0.0 %  Aschelernwert         00:27:56 Block 073: Partikelfilter (Fahrzeugdaten)   0.0 l  Verbrauch seit Regeneration   0 km  Strecke seit Regeneration   0.0  Zeit seit Regeneration

I'd call that regeneration.

Here's a picture of the speed-pressure graph.
It was a bit rough, but I encountered two foxes that I definitely didn't want to involve in my logging activities.