TDI Brennraum und Ansaugrohre reinigen

Hello... I can recommend using PRO-TEC products for cleaning the diesel system (e.g., DSSC for systems with high-pressure pumps). If the injectors are removed, I also recommend using Carbon X for combustion chamber cleaning. And if you're already at it, you can use "Triple X" for intake manifold cleaning (but this requires special equipment that produces a fine spray). Also, consider using a diesel particulate filter cleaner (DPF-Cleaner).
Greetings.

Hello,

Quote:

Combustion chamber cleaning with ...

Okay, so if the engine is in good condition, there shouldn't be any significant deposits in the "combustion chamber" of a TDI engine.
And if the engine isn't running well and the mileage is extremely high, then the existing oil sludge might at least still contribute a little to sealing, especially in the area around the piston rings. I'm not sure if it's a good idea to remove it, because if you do, it's likely to be the end of the road.

However, depending on the mileage and driving conditions, cleaning the valves or the intake manifold can be beneficial, as these components tend to become clogged over time, which reduces the free cross-sectional area of the pipes.

The question is whether chemistry can be effectively used in this situation, given that there is a thick layer of oil and carbon deposits (at least 5mm) adhering to the walls, and whether a mechanical cleaning method would not be more appropriate.

Best regards, Rainer.

Hello... I have been using these products in my diesel vehicles for about 3 years. One of the reasons I started using them was the high differential pressure in my Passat 2.0 TDI (see also...).
[link to forum post: /viewtopic.php?t=29251]) and a carbonized intake manifold on a comparable model.
Since then, the DPF differential pressure has decreased from 400hPa to 325hPa. The engines are running smoothly and powerfully. The upshifts in the DSG transmission are occurring slightly earlier, and even when driving uphill with light acceleration, it does not downshift one gear, which is unusual.
"As a result of cleaning the combustion chamber on a Passat 2.0 (approximately 190,000 km), I was able to extract a black sludge. The cleaning process likely cleaned the cylinder pistons and valves at least partially. You can assess the situation using an endoscope camera (if available). The previous post discussed removing an injector, which provides access to the combustion chamber."

Everything described above is simply a description of the state after application, nothing more. Mechanical cleaning is, of course, an option if you have the ability to disassemble your engine.
So far, I haven't experienced any negative effects after using the cleaning products.
Greetings.

Hi.

Here's what a piston looks like that has become carbonized due to damage:
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Pistons typically look like this:
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Everything are not new engines, but old ones. What do you want to clean there?

Unless there are any waste materials in the tank, there's no point in cleaning it.

It would be appropriate to place the image at the very bottom.
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

However, I highly doubt that a chemical cleaning would be effective, and even if it were, it's likely to cause more damage than doing nothing at all.

"These miracle products have been around for 20 years. Please refrain from advertising in my forum. As for using them yourself: Man's will is his heaven on earth. If it makes you happy, go for it."

By the way, the DSG transmission doesn't care at all about what the combustion chamber looks like; the programmed shift points are defined by the software in the DSG and the engine control unit, and nothing else.

What could be useful would be additives to prevent the carbon buildup in the very fine bores of the fuel injectors. However, I cannot provide any reliable data on this, as who would disassemble the injectors after 100,000 km and check them, install new ones, and then check them again 100,000 km later?
Drivers of Passats with 170 hp engines and PPD injection are most likely to have experience with this issue, as their fuel injectors are prone to carbon buildup.
It is practically possible to measure whether the injectors are clogged or not without disassembly (by comparing lambda values under defined conditions).

Perhaps one of the Passat drivers affected could share their experience and let us know whether fuel injector cleaners had a positive or negative effect.

Best regards, Rainer.

Hello... My intention is not to advertise any particular product. Rather, I wanted to share my experience and point out alternatives for how to solve or at least reduce a problem. For example, regarding DPF differential pressure: you can read the values before and after cleaning very nicely using VCDS. The same applies to other data (calibration values, oil ash volume, etc.). Hopefully, this will allow me to keep the vehicles running for longer without significant engine problems.
I have to disagree about the DSG shift points. The shifting behavior has changed. To avoid misunderstandings, noticeable improvements are gradually being implemented.
Greetings.

Petrol wrote:

Example DPF differential pressure: can be very nicely read out with VCDS values before and after cleaning. The same applies to other data (calibration values, oil ash volume...). Hopefully, this will keep the option open to drive the vehicles for longer without significant engine problems. I have to disagree about the DSG shift points. The shifting behavior has changed. To avoid misunderstandings, noticeable improvements are gradually being implemented. Greetings

Hello,

As I said, man's will is his heaven.

The readable oil ash volume never corrects downwards, under any circumstances (fact).

The differential pressure primarily depends on the soot load of the DPF, as well as the exhaust gas temperature and exhaust gas volume.

Therefore, I am 100% certain that you did not take your measurements under identical conditions.

The claim that engine cleaning changes the DSG shifting behavior is simply nonsense. Furthermore, you mentioned in another topic that you drained a brown liquid from the DSG and changed its oil.

Even after the oil change, I still think the car drives better, even though I know that's probably not true.

On that topic, everything has been said; believing is not the same as knowing.

Best regards, Rainer.