Z4-forum.com

Posted: **Fri Apr 14, 2017 6:16 pm**

I'm getting a noticeable vibration in the car when pulling away at low speed and when the engine revs drop below 0.75k. Does anyone have any experience with this post fiitting vibra technic mounts? Completely fine above 1k.

Posted: **Fri Apr 14, 2017 6:25 pm**

Viren wrote: ↑Sat Apr 08, 2017 10:33 pm Those of you who have had your bearings replaced, what has been you "break in" procedure. Seems to be mixed school of thought. Some say no break in is required as there is no contact. Some say more than 1k of break in. Interested to hear views, I'm thinking keep it under 3-4k for 500 miles. Change oil at 1k. But that's just a complete guess based on what I've read so far.

If there's no contact then how does the wear occur? Something's rubbing against those shells to make them look like that

Rob

Posted: **Fri Apr 14, 2017 6:47 pm**

I would be doing a running process the same as if new, with oil change around 1,200 miles.

Posted: **Fri Apr 14, 2017 8:00 pm**

Viren wrote: ↑Fri Apr 14, 2017 6:16 pm I'm getting a noticeable vibration in the car when pulling away at low speed and when the engine revs drop below 0.75k. Does anyone have any experience with this post fiitting vibra technic mounts? Completely fine above 1k.

Ok so went for a quick drive, I'm getting a very noticeable vibration when I engage the clutch let the car run in 1st gear but do not give any gas. Like coasting in 1st. Is this a symptom of vibra technic or unusual?

Posted: **Fri Apr 14, 2017 9:57 pm**

Those mounts do vibrate at very low revs, not quite sure why you're running below 750rpm tbh though. I have a slight bit of vibration at idle but on the move there is no perceptible increase in NVH. My comments are based on the road version so if you went for the track it'll be worse.

Posted: **Fri Apr 14, 2017 11:23 pm**

Same with me (also road mount), I only feel slight vibration on idle; 750rpm.
However I never drive at that rpm, unless in traffic when I have to coast at idle, doing like 1or2mph.
But my impression is that its rpm related; at 900 or so its already gone.
The vibration also isnt really harsh. You mostly feel it on the side of your leg, resting against the drivetunnel.

Posted: **Fri Apr 14, 2017 11:59 pm**

Does anyone know the torque for the mount bolt?

Posted: **Sat Apr 15, 2017 8:07 am**

About 45nm iirc, not that much really.

Posted: **Sat Apr 15, 2017 10:24 am**

Before 3 days I have done my rod bearings replacements and changed also my mounts with Vibra Technics Road version. The car at cold start has vibrations and has no comparison with stock mounts. However within the first mile the vibration gets reduced and disappears. My car has idle at 950 rpms however. Also the car feels more robust on the gear changes but that can be also a placebo effect.

Posted: **Sat Apr 15, 2017 10:40 am**

FD3S wrote: ↑Sat Apr 15, 2017 10:24 am Before 3 days I have done my rod bearings replacements and changed also my mounts with Vibra Technics Road version. The car at cold start has vibrations and has no comparison with stock mounts. However within the first mile the vibration gets reduced and disappears. My car has idle at 950 rpms however. Also the car feels more robust on the gear changes but that can be also a placebo effect.

So to be a little more clear sometimes when pulling away up hill if you don't give enough gas the revs drop a little and I feel a vibration throughout the car (the cars idle is perfect, no issue with that, just the vibrations). Also when pulling away like normal there is an initial virbration. It has been getting gradually worse and I've booked the car in to have it looked at. Will let you guys know what the problem is.

Posted: **Sat Apr 15, 2017 7:53 pm**

The mounts might have exacerbated an existing clutch/flywheel problem.

Posted: **Sun Apr 16, 2017 7:01 pm**

Viren wrote: ↑Sat Apr 15, 2017 10:40 am
FD3S wrote: ↑Sat Apr 15, 2017 10:24 am Before 3 days I have done my rod bearings replacements and changed also my mounts with Vibra Technics Road version. The car at cold start has vibrations and has no comparison with stock mounts. However within the first mile the vibration gets reduced and disappears. My car has idle at 950 rpms however. Also the car feels more robust on the gear changes but that can be also a placebo effect.
So to be a little more clear sometimes when pulling away up hill if you don't give enough gas the revs drop a little and I feel a vibration throughout the car (the cars idle is perfect, no issue with that, just the vibrations). Also when pulling away like normal there is an initial virbration. It has been getting gradually worse and I've booked the car in to have it looked at. Will let you guys know what the problem is.

The same applies for me. Below 750 rpm when I am in first gear I have noticeable vibrations. Also when the car is starting a cold start I have a slight vibration in the whole cabin. To be honest after the rod bearing replacement I have done only three runs with the car so I have to test it more so I can verify those situations.

Posted: **Sun Apr 16, 2017 7:41 pm**

FD3S wrote: ↑Sun Apr 16, 2017 7:01 pm
Viren wrote: ↑Sat Apr 15, 2017 10:40 am
FD3S wrote: ↑Sat Apr 15, 2017 10:24 am Before 3 days I have done my rod bearings replacements and changed also my mounts with Vibra Technics Road version. The car at cold start has vibrations and has no comparison with stock mounts. However within the first mile the vibration gets reduced and disappears. My car has idle at 950 rpms however. Also the car feels more robust on the gear changes but that can be also a placebo effect.
So to be a little more clear sometimes when pulling away up hill if you don't give enough gas the revs drop a little and I feel a vibration throughout the car (the cars idle is perfect, no issue with that, just the vibrations). Also when pulling away like normal there is an initial virbration. It has been getting gradually worse and I've booked the car in to have it looked at. Will let you guys know what the problem is.
The same applies for me. Below 750 rpm when I am in first gear I have noticeable vibrations. Also when the car is starting a cold start I have a slight vibration in the whole cabin. To be honest after the rod bearing replacement I have done only three runs with the car so I have to test it more so I can verify those situations.

That's interesting, where abouts are you based would be good to do a comparison if you want?

Posted: **Sun Apr 16, 2017 8:04 pm**

I think its just a trait of the mounts unfortunately quite a few on cutters have installed them and removed them due to vibrations maybe take a look on there

Posted: **Sun Apr 16, 2017 8:19 pm**

It's funny because the vibration has got progressively more noticeable. Normal driving it feels so tight nothing wrong. It's really only on idle and pulling away at low revs. I'll take a look on cutters as well

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