Moreteen schrieb:
carstenpatch, yes I highly recommend to replace the original air intake nozzle of the KV with the suggested nozzle you mentioned above. I did it and there was a great improvement of the milk foam. One more advice: If you remove a pressure hose from the AV and you want to reinstall it, then put the o-ring onto the pressure hose first!, beforen you reinstall the pressure hose to the AV. Never put the o-ring to the AV first before you install the pressure hose, because if you do so the o-ring might get damaged and cause exactly the proble which you had.
I found out that putting the o-ring on the hose before inserting it was way easier that putting it into the hole first. It could have been me that caused the damage to the O-ring and the following problems with the little piece getting stuck.
It is so so crazy how unlucky I have been to possibly cause another fault resembling my problem so much that I didn't even notice that it was a complete new problem. No wonder you all were running out of ideas in the end!