[Trinus] Printer started getting a problem, what could be wrong?

[veclock]

Here is a PTFE Throat inside is a lining. this lining gets deformed.

What is happening is the filament is getting into a gap between the nozzle, throat and the heat block and staying too long and crystallizing, thereby clogging the filament path.

I don't seem to have a part like that. If it can be seen in my latest image, can you point out which one it is?

I printed at 240 degrees at 50% speed now for a few hours, it went ok. Until the filament didn't extrude any more and tangled up inside the print head. Had to drag out 50 cm filament from it afterwards. This is the second time that happens...
Then afterwards I manually push through some filament and it comes out perfectly. Such a mystery.................