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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > NO one can uncover vibration at Mway speeds 335i



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      05-09-2014, 12:52 PM   #1
garyc7
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NO one can uncover vibration at Mway speeds 335i

Hi All

So after many months and several people/Indies and wheel specialists looking at my 335i I still have a vibration that I cannot get rid of.

It happens from about 55 all the way up...

I can feel it through the seat yet there is a small vibration through the wheel too, so its difficult to pinpoint where its coming from as it seems to travel... so any help welcomed, especially if you have had the same and its been cured!!!

I have had the following done in the quest to eradicate it...
  • New tyres
  • New front disks and pads
  • wheels balanced by very good tyre specialist
  • Hunter alignment
  • Dealer checked out suspension for defects

So as you can see, much has been done, but still no-one can find the source. I have been generally quite good at locating problems, but this has me totally stumped!!

Also additional info, when driving along on trailing throttle the vibration remains and is possibly a little worse if lifting off, but its a minimal difference...

..so any suspension/drivetrain experts out there??

Thanks
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      05-09-2014, 01:04 PM   #2
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have the same problem in my 335d,was at higher motorway speed.tried balancing,different alloys,hunter alignment.the problem has steadily got worse and more so under breaking now.i have now purchased m3 front control arms and new break discs and pads.hopefully when i get these fitted it will cure the problem.
might just try fitting control arms first without breaks then give it a run to see if that was the problem.then fit breaks after.
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      05-09-2014, 01:08 PM   #3
bjc1973
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forgot to add i put new tyres on front too.
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      05-09-2014, 01:51 PM   #4
garyc7
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Strangely braking does not accentuate it, it just seems to be there all the time on motorway/A road speeds, all i know is, no one seems able to locate iot without suggesting changing loads of expensive parts... typical dealers
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      05-09-2014, 01:53 PM   #5
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Its not always obvious things.

Gearbox/engine mounts
Exhaust vibration
undertray flapping around at high wind speeds
CV joint
Prop shaft bush

Lots of things I would have checked before throwing parts at the car tbh.

what garages have you been using.
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      05-09-2014, 02:04 PM   #6
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Maybe try cleaning ALL the hubs where the wheel meets wire brush then sandpaper rust away this cured what sounds like same problem on previous car of mine
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      05-09-2014, 02:09 PM   #7
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What's your current wheel setup? If after market, try putting back the stock wheels and see if it goes away. Aftermarket wheels might not be hubcentered.
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      05-09-2014, 02:12 PM   #8
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spacers? should be hub centric hopefully if you have them. otherwise wheels could not be sitting right. I would try different wheels just to be sure even if they were balanced.
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      05-09-2014, 02:13 PM   #9
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Have you got spacers fitted? I had them fitted last year and had a high speed vibration.
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      05-09-2014, 02:31 PM   #10
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I had this some time ago it turned out to be one of the rear disc's. It was not warped ware the pads are it was out of shape ware the handbrake shoes are and one of the shoes wasn't releasing right and rubbing on the low spot of the inner part of the disc.
You could have the rear brakes apart and cleaned up and check to see if there is any sighs of heat marks or one of the shoes is wearing funny.
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      05-09-2014, 03:25 PM   #11
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Ah yes Joeyt, I agree, i forgot to mention, checked, gearbox/engine mounts, doughnut/guibo, nothing flapping, all nicely tight.

However, it could be a cv joint, although again, nothing obvious when wheels off and spun up, no noises etc, unless there is another way to check?

Been using very reputable and highly thought of garages.

No spacers, no funky wheels, bog standard car.

I am going to try out a different set of wheels just to be sure however, again they will be standard wheels.

will1968.. I will have a look at the handbrake, although would I not smell a burning if they were not releasing?
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      05-09-2014, 05:06 PM   #12
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Those are where I would look but if they have been checked then maybe worth checking the handbrake shoes.

Other than that im a bit stumped. Where are you based as ill take a look of your close by?
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      05-09-2014, 05:14 PM   #13
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Rear sub frame bushes, just replaced mine with Whiteline poly bushes and made a huge difference for a while. Wobble through seat came back today though. The alignment gets thrown out again. Replaced everything except lower ball joints so that is next on my list.
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      05-09-2014, 09:55 PM   #14
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Quote:
Originally Posted by garyc7 View Post
Ah yes Joeyt, I agree, i forgot to mention, checked, gearbox/engine mounts, doughnut/guibo, nothing flapping, all nicely tight.

However, it could be a cv joint, although again, nothing obvious when wheels off and spun up, no noises etc, unless there is another way to check?

Been using very reputable and highly thought of garages.

No spacers, no funky wheels, bog standard car.

I am going to try out a different set of wheels just to be sure however, again they will be standard wheels.

will1968.. I will have a look at the handbrake, although would I not smell a burning if they were not releasing?

I didn't notice any burning smell. I think it's as the shoe comes into contact with the hub inside the disc it moves in and out and as you go faster the movement gets greater and you start to feel it.

This may not be what the problem is but I wouldn't over look even some of the new bits you've fitted as well as you could of replaced the problem with a problem if you know what mean. Even a new tyre can be bad.
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      05-10-2014, 04:50 AM   #15
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Maybe its a cv joint, ball joint, hub?
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      05-11-2014, 09:26 AM   #16
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Cheap tyres ?
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      05-11-2014, 10:06 AM   #17
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Im sill picking my brain for you mate. Iv even asked a guy I know that makes me seem an idiot when it comes to cars and he's also picking. Ill vome back with a few things if I think of any.
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      05-11-2014, 11:56 AM   #18
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Sounds like firm what you've said you've covered all the basics. There are sometimes some odd things that are overlooked or missed they can be small but can make a difference. When we get odd things like this there are several things we look for:

Tyres: though new we've seen tyres fresh off the tyre depots shelf with run out issues. On the ramp we have the car in the air standing behind each wheel looking directly at the tread pattern we get some one to spin each wheel clockwise then anti clockwise spending a bit of time looking at the inner, centre then outside sidewall.

The person says doing behind each wheel stays perfectly still as the tyres spinning they are looking for oscillation in the tyre tread block( noted as feathering) you'll see the tyre if it's out moving very slightly usually you'll see the smallest of dip either upwards and very occasionally downwards or even slightly sideways. It's a small movement but as speed increases so do the pressures and loads on the tyre and it's enough to create an issue though not oddly as we've discovered enough to bring an irregularity regarding balancing.

Common science would state that the pressures are always checked while doing anything in this area.

If we see something like this we'd also revolve the tyre putting our hand in the area of concern to feel the difference and again it can be very slight but it can be enough. If you're lucky enough to have the same tyres all round(difficult with a BMW these days) we would then usually swap wheels around and re drive to see or feel if the symptoms alter.

Doing what we do sounds like common sense but oddly enough when tyres are checked its a quick once over only that's done and not enough time spent looking at the obvious, as the symptoms come in at a certain speed chances are it's a rotational type problem. But I know these can cause grief and are frustratingly difficult to pin down.

Brakes: brakes gave been replaced, we've seen partially binding calliper(s)causing issues, often over looked when spinning the wheels around hence why we opt to look at brake efficiency using our MOT rollers, if you see the needle fluctuate on the rollers then Sod's law says when sped increases metal gets hotter and expands this will come into play more, you'll sometimes ex see this as a slight upwards shaking if the steering wheel, though again when we come across cars with this issue people on,y talk about the vibration side of things, rather than the steering wheel shake. But it's a long shot, but worth exploring as a calliper partially binding will create a shudder that some feel and find difficult to describe. We've seen countless disc pads replaced with a calliper issue in toe even though the calliper has wound back it turned out that when the brakes were changed some difficulty was encountered when performing the change.

Suspension: many times thus has been covered the arms should be an easy spot really obvious ones are the arms that everyone's been discussing in here usually from the drivers point if view I've discovered when these are on their way out you'll feel slight vagueness when driving when you tap the brake pedal you'll feel a slight judder, over speed humps at slow speed you might hear a slight squeak as the arms are loaded but I'd kinda doubt these are your offenders but stranger things have happened.

Others have wrapped up the rest re suspension

Drivetrain: your vibration could be traveling down the prop again the others have gone over this. One question I'd ask is after driving for a while when you select reverse after about 1-3 seconds do you hear a slight thud?

Hope this drivel helps best of luck finding the issue
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      05-11-2014, 12:20 PM   #19
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Has anybody mentioned propshaft balance. Put a jubilee clip on it and rotate it after testing on the road.
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