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Rod bearing replacement - UPDATE
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Rod bearing replacement - UPDATE
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.
07 Z4MC standard spec
- Smartbear
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Rod bearing replacement - UPDATE
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
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Rod bearing replacement - UPDATE
I would be doing a running process the same as if new, with oil change around 1,200 miles.
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Rod bearing replacement - UPDATE
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?
07 Z4MC standard spec
- Steve84N
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Rod bearing replacement - UPDATE
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.
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- GuidoK
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Rod bearing replacement - UPDATE
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.
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.
Z4 3.0i | ESS TS2+ | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | fully polybushed | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers | Sachs Race Engineering clutch
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Rod bearing replacement - UPDATE
Does anyone know the torque for the mount bolt?
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Rod bearing replacement - UPDATE
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.
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Rod bearing replacement - UPDATE
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.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.
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- Steve84N
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Rod bearing replacement - UPDATE
The mounts might have exacerbated an existing clutch/flywheel problem.
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Rod bearing replacement - UPDATE
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.Viren wrote: ↑Sat Apr 15, 2017 10:40 amSo 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.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.
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Rod bearing replacement - UPDATE
That's interesting, where abouts are you based would be good to do a comparison if you want?FD3S wrote: ↑Sun Apr 16, 2017 7:01 pmThe 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.Viren wrote: ↑Sat Apr 15, 2017 10:40 amSo 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.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.
07 Z4MC standard spec
- hopz121
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Rod bearing replacement - UPDATE
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
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Rod bearing replacement - UPDATE
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
07 Z4MC standard spec