Hello everyone.
'I'm having the following problem: Since I had an accident on the highway (my car slid into the guardrail), my car vibrates at lower RPMs (up to 1200 revolutions). You can mainly feel it in the steering wheel, but also throughout the entire car. Oh, and I drive a '95 Golf 3 TDI. I've already replaced the engine mounts and had the alignment checked, but it didn't help. The vibrations disappear as soon as I start driving. I don't know if it's related, but during the accident, I ripped the guardrail out of its mounting bolts that are embedded in the ground, and drove over it. The ADAC (German roadside assistance) employee told me that I would probably need to replace the lower control arms, but since they didn't find anything wrong during the alignment...' I didn't do it, and I didn't see any damage to it.
You are right, the tires did have flat spots, but I changed them immediately after that. However, I think this would become noticeable during driving, and I am experiencing vibrations while stationary.
If it can only be used while stationary, then all the suspension components are immediately ruled out.
Perhaps the dual-mass flywheel (if the 1Z has one) was damaged during the crash, either by the impact itself or by the sudden engine stop.
I suppose you didn't have time to properly shut down the engine, but rather it stopped more or less abruptly?
The engine mounts could also be the problem...
What happens at those specific RPMs while driving? For example, if you're driving in third gear at 1000 RPM? If there's no shaking then, I would suspect the engine mounts, as they are loaded differently when the engine is pulling, while all other conditions remain the same.