Leistungsverlust TDi 150PS | Posts 16+

Dieselmartin wrote something about coal chunks in front of the valves.
Indeed, I saw it; however, it was the intake manifold, which runs above the valve cover, that was so heavily encrusted that you could only fit one finger into the opening, where normally two would fit.
The cylinder head didn't look any better either.
I haven't noticed that to such a drastic extent with the TDI models.

@Chris:

"I removed the pressure hose earlier and inspected it by shining a light into the EGR valve. Besides a single drop of oil on the flange and a very thin, blackish layer, everything was empty and clean. The upper rod of the EGR valve itself was completely metallic and shiny, while some whitish residue was visible on the lower part. So, after 26,000 km, the EGR component is almost clean. Only a thin, rough coating was noticeable on the top of the shut-off valve."

What kind of driving profile do you have with your TDI that allows it to behave like that?

It's funny that I have the same type of clamp on the EGR valve as you do, but a regular hose clamp on the pressure hose coming from the intercooler, just like on the radiator hoses. It surprises me how well that clamp on the EGR valve seals. The pressure hose is only secured at the *bottom* – amazing!

verschandeln AGR .
after that, more power and better responsiveness .
By increasing the amount of exhaust gas in the intake air stream?
Never .
I think it's more likely that sealing the EGR valve will bring about these improvements.
And in cases of extreme contamination, the intake manifold should be cleaned.
This has been undisputed so far, both here and everywhere else.

or not?

@Durness:

The EGR valve also allows the compressed fresh air to pass through on its way from the air filter housing to the intake manifold...

if that's the case, then oops .

However, in my TDI, the EGR valve only controls the amount of exhaust gas being recirculated.
If the EGR system is active, then there are no exhaust gases in the intake air, and the fresh air never comes into contact with the valve.
But I should have looked at the photo more closely; otherwise, it would be less embarrassing now.

Hi,

I cleaned my DPF (Diesel Particulate Filter) after 50,000 km of mileage, so I removed the EGR valve... it's incredible how much dirt was inside. Currently, I have the EGR system deactivated because I believe that buildup is not good for the engine.
And it runs much smoother now, and after the cleaning, it's even a bit more powerful .

Does cleaning the intake manifold make a difference? Has anyone ever looked inside it? Is it heavily soiled?

Best regards, Benny.

@ Benny

"Not in the Krümmer itself, but the rubber hose before it was so full of oil that after I removed it, I couldn't hold it vertically or else the oil would leak out."

So, in my case, there will also be a lot of oil in the low-temperature coolant.

Maybe I'll give it a thorough cleaning sometime on a nice weekend, taking everything apart and rinsing it all out.

(I have a G3 TDI - 1Z - so don't despair looking for the rubber on an ARL ).
For reference:
http://people.freenet.de/golf-schrauber/TDI_Motorraum.jpg

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

Sure, here is the translation of the text from German to English:

'Hi,'

I didn't have any oil in my rubber hose... just a tiny drop on the edge.
Okay, then I won't verschandeln anything else and will leave it as is .

Best regards, Benny.