Passat 1.9 TDI (AVF), Unwucht / Vibrationen im Leerlauf | Posts 16+

Good evening.

The vacuum system has been checked multiple times during previous repairs, and some hoses (with textile sheathing) have been replaced with silicone hoses.

I had already checked the rubber grommet myself during a battery replacement because it was being pushed out by the splash guard.

I would rule out a vacuum system for now. However, I haven't personally checked it myself, except for the hoses that are easily accessible from above.

Regards,

Marc.

The vacuum system is likely not the cause of the "eggs idling" issue. Could you please post a video of the engine running so we can assess the situation?

Best regards, Rainer.

Good morning, everyone.

In the videos I've created so far, nothing is visible. However, it might be possible to faintly hear the rumbling sound that accompanies the impacts on the steering wheel, seat, and gear stick.

From my first post:

Quote:

The noise and vibrations in the ground feel about the same as when a washing machine is spinning with an imbalance, or when balancing wheels, but the weights are still missing...

In the meantime, in addition to the "brr-brrt-brrt" noises heard during the initial start in the morning or after a long period of inactivity, which are also accompanied by vibrations in the vehicle, there have been noises when switching off the engine. Even though the last workshop ultimately didn't address the issue, they clearly attributed these noises to the dual-mass flywheel (DMF).
Sometimes, metallic noises can be produced when releasing the clutch with the first gear engaged and the handbrake applied.
Apparently, the workshops like using this "test" to rule out any faults in the dual-mass flywheel (DMF).

Even when accelerating in too high a gear at low engine speed, it can cause significant – relatively low-frequency – vibrations in the car's body.
Unfortunately, the workshop supervisors don't seem to notice anything at all. They say the AVF engine is running very stably. Mine also runs quite smoothly, although they said they've seen others that run even better.
However, I always emphasize that, from my perspective, the engine itself doesn't seem to be causing any problems. Given that the symptoms have been present for about 25,000 km, if it were a problem with the engine itself, things would likely have worsened by now.
It's all useless if no one believes you, not even for money.

For entertainment purposes:
The last workshop rejected my request for a partial refund of the invoiced amount (due to unnecessary work that I did not authorize), which was, unfortunately, expected.
And that's despite the fact that they only replaced the flexible hose after a special request and with an extra day of work, and they didn't even look at the dual-mass flywheel. Instead, they preferred to carry out unnecessary troubleshooting on the engine control unit/intake manifold – troubleshooting that had already been done multiple times and which I hadn't even requested.

I now believe that you should have a specialist lawyer involved from the very beginning when you are giving an order. Otherwise, you're just asking for trouble.

Regards,

Marc.

Quote:

In the videos I have created so far, nothing can be seen. Possibly, you can faintly hear the rumbling that accompanies the impacts on the steering wheel, seat, and gear stick.

If the motor isn't visibly wobbling back and forth within its mounting brackets, it might not be that bad.

Yes, there is a noticeable lateral movement of the VW emblem (between 0.5-1 cm on each side) that wasn't present before.
Before the "damage" occurred, only a slight vibration of the emblem was visible.

The coolant hoses and other components are also wobbling quite noticeably.

Unfortunately, my camera isn't capturing the motion because of the shutter speed settings; otherwise, I would have already shown it to you.

Regards,

Marc.