Alternatives to ZMS: Find the Best CMS Solution

Hello everyone!
I've been driving around with this rumbling car (around 1,400/min) for quite some time now. I recently took it to a mechanic who checked the injectors and looked inside the combustion chambers. He found some wear on one of the pistons (either the 3rd or 4th). The symptoms are actually those of a faulty dual-mass flywheel (DMF), but my 1Z engine probably doesn't have one. Could it then be the "rigid flywheel"? Unfortunately, there was also a wheel bearing failure on the front left side, near the transmission .

Best regards,
Torsten.

It could be coming from the serpentine belt. Possibly, the tensioner is defective.

Okay, with the !z engine, you hear a lot of rumbling and resonance noises at around 1400/min. I almost got rid of it by using a cheaper exhaust. But I would say that's absolutely normal. I put up with it for 190,000 km .

Aloha!
Sorry guys, KRR ist neu, Riemenspanner ist gespannt und ruhig bei der betreffenden Drehzahl, das Flexrohr ist's ziemlich sicher auch nicht, das würde bestimmt nicht den Motor vibrieren lassen, wie einen Schwingschleifer. Da es ja nicht von den Kolben zu kommen scheint, gehe ich nach wie vor davon aus, daß es das Schwungrad ist, wenn dem so sein kann. Seitens VW habe ich heute erfahren, daß wohl wirklich nur ein simples Schwungrad verbaut wurde. In der Kupplung spürt man nix, es sind wie gesagt die hier nachlesbaren Symptome des ZMS, eigentlich..... Pleuel- und Kurbelwellenlager können es fast nicht sein, denke ich, weil ich nicht nur seit mehr als 2.000km so unterwegs bin, sondern weil die vermutete Ursache noch länger zurückliegt und diese Lagerschäden normalerweise ruckzuck zum Exitus führen würden. Ich vermute, daß es unbemerkt blieb, weil, wie Ihr richtig bemerkt, so einiges da und dort brummt, den KRR habe ich erst danach abgestellt, und weil beim "Crash" das getriebeseitige Motorlager zerlegt wurde, auch erst sehr spät bemerkt ( Nachlässigkeit, nie gut. ). So lange konnte der Motor seine Vibrationen nicht auf die Karosse übertragen. Das jetzige Brummen fiel mir in der Form erstmalig auf, als das ML ersetzt war. Es ist das richtige! Es wird wohl darauf rauslaufen, eine neue Kupplung zurechtzulegen, Zeit einzuplanen, auch das Schwungrad zu besorgen und das Ganze mal zu öffnen. Unless someone can offer input on the original question, could a simple flywheel have a similar effect to a dual-mass flywheel (ZMS)?

Best regards,
Torsten.

Okay, thank God, there are still workshops where the people take their time and crawl around in the engine compartment. However, I found those in Italy.
The findings are limited, but I don't want to give up on this because it really bothers me (and the dog), and it might also be interesting for others, right?
Upon inspecting the engine, the only noticeable issue was that vibrations could be felt at the front engine mount (even when idling, and all engine mounts are new). This vibration is also transmitted to the front engine carrier. I would like to replace the two rubber stoppers at the ends of the carrier; these parts aren't expensive, but is it a complicated job? Perhaps they have simply become very hard over time.
That would address the symptom, but what's causing the vibrations? I contacted a motor repair specialist (this time someone who seemed competent and professional, not just a joker), and he suggested checking the vibration damper (the pulley on the crankshaft).
It will be more expensive, but easier to implement.
A simple test would be to lower the KRR (Kurbelwellenriemen - crankshaft belt), remove the wheel, and start the engine. However, I was informed by some Italians that this is risky because the ZR (Zahnrad - gear) could jump off. Can anyone confirm this? Perhaps I should have a custom plate made for testing, but I would need the dimensions (outer diameter, inner diameter, etc.).
Hole pattern for the screws, including the screw size (M), and the thickness of the washers used with the screws.

Can anyone help me with something?

Best regards,
Torsten.