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Discussion Starter #1
Hi guys,

To make it short (which means ...long). !
My M5 3.6 (91) have dodgy and frustrating vibrations and weird noises...mostly coming from the front. Will try to describe those symptoms, but first will list what has already been changed recently with me as a owner .

Car is 153 K, with rear simple SLS.

Changed in the last 2 or 3 k by myslef :


Tyres all round (balanced of course) /rear springs and rear strut mounts/propshaft doughnut/clutch/all the front arms and bushes (upper and lower)/tie rods..and ball joints/front sway bar links/ rear pitman arms/rear links/ rear subframe bushes/gearbox and engine mounts/disks..pads...and shoes.../ self levelling liquid....etc, etc plus plenty of other bits i am sure I forgot.

My concerns :

I have no wheels bearings noise at all , however, when the front is jacked up, and I turn the front wheels freely, they seem to do not turn in a perfect round shape..but more with an slight eggy shape...Undone the wheels and looked at the wheels bearings/hub and removed them..no sign of wear or marks...swapped the wheel bearings/hub from one side to an other...same pb...still turn with this slight eggy shape, car still vibrates (i must add that although I am not the smoothest driver in the world by far...I never used this car in a trackday or never hit any curves..etc..).

Pbs are :

Front :
- when I drive the car at 2 or 3 mph on a flat surface (ie: car park) it seems that the front goes slightly up and down, like the tyres are not turning as a 100% perfect circle.
- Was in France the other day, and on our smooth/billiard french motorways...well....at 60mph...huge vibration in the steering wheel ...and these up to 100mph...When I pass 100 mph....vibrations are obviously less obvious as wheels go really fast, but still...it did vibrate, so i had to go to Paris driving at no more than 70mph at night grrrrrrron empty straight motorway in dry wheather. What a shame ! Came back from France and changed all the front and rear arms ...Still the same...Add a tracking done....not an improvement at all.

- I have a clonking noise coming from the nearside front of the car... once again when I go over a road irregularity, a road whole, etc...

Rear :

When I changed the rear springs and struts mounts...I noticed a usual slight sippage in the rear shocks...but nothing major. (Master Tech at Vines Guildford didnt find my car too low, and bloke at Muncih Legends told me over the phone that it was normal that my car seats slighty higher on one side compared to the other ) but what is more annoying is a recurrent metal against metal noise that makes the rear shocks..especially when I drive over a bumpy road or any road which is not 100% perfect (as it is in UK, and especially where i live in the Surrey hills)...It looks like the top washer that you can see when you remove the rear seat is touching something on the strut itself...and does this noise all the time!

REALLY FRURSTRATING as you can guess, as , because I am trying to make this car very cool with all expensive maintenance done for the next owner who may purchase it, BUT when I sort out a pb...an other one immediately occurs.

Right ..so now it may be the shocks which are shot, but my car is not going down when I am breaking, and doesnt pump at all when I press the front shock. For the rear...well maybe the shocks as well are shot...but any of your thought would be welcome.

Please note that if any guys mechanically (or not) minded that would live next to me in Surrey (I live 6 miles form Guildford), and would have a bit of spare time , are welcome to come and test drive the car to give me your opinion/thoughts or want to have a more accurate idea of these noises. On the other hand, I could drive to you.

As an immediate help, I would be definitely up for any e34 M5 owner (3.6) to ask his help by jacking up the front of his own 3.6 and turning his front wheels forward and telling me if they turn with this slight eggy shape both side, as it would be hard for me to believe (and accept financially the consequences grrrrrrr) that suddendly :

my two wheels bearings are gone, neither would imagine that the axles of the front legs could be out of shape , and my front and rear shocks are shot!( Looking in the car history, shocks have been changed quiet often though !)

Lastly, I would be keen to hear of the sets/brands of rear shocks available or recommended by anyone that would have eliminate the rear SLS...as I am seriously starting to consider to loop the Power steering /Self levelling and ending the rear shocks pbs with the car... and save money as 290 quid a shock from BMW is too outrageous, and I don't want to bother Garcia in the US either as he seems to be really busy and I can't afford to have my car jacked up for 2 or 3 month on my driveway while waiting for shocks refurbishment.

Would I need to buy new springs as well if I go for non Self levelling shocks ?


Many tks for reading and for your answers if you gets any ideas.

Cheers

Styve :cheers:
 

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valiers said:
I have no wheels bearings noise at all , however, when the front is jacked up, and I turn the front wheels freely, they seem to do not turn in a perfect round shape..but more with an slight eggy shape...Undone the wheels and looked at the wheels bearings/hub and removed them..no sign of wear or marks...swapped the wheel bearings/hub from one side to an other...same pb...still turn with this slight eggy shape, car still vibrates (i must add that although I am not the smoothest driver in the world by far...I never used this car in a trackday or never hit any curves..etc..).
Could it be possible that the actual wheel itself is out of true, I.e. slightly buckled?
If you swap the wheel to the opposite side does the problem follow the wheel, or stay with the hub?
Have you tried driving on the spare wheel instead on the affected corner of the car?
 

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Discussion Starter #3
nexus1972 said:
Could it be possible that the actual wheel itself is out of true, I.e. slightly buckled?
If you swap the wheel to the opposite side does the problem follow the wheel, or stay with the hub?
Have you tried driving on the spare wheel instead on the affected corner of the car?
Hello,:sad1:

I'd doubt that the wheels itself would be slighlty buckled , however I can't be sure 100% until I bring it to some sort of specialist that would have the appropriate checking gear. What I can say is that I swapped the rear wheels with the front for testing in order to see if any improvement would be made...and definitely not. Same story.
I have tried driving on the spare wheel as well and same story. Spare tyre is worn though.
Lastly, I cant swap wheel from one side to an other (ie: offside to nearside as tyres are directionnals).

Cheers. styve
 

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valiers said:
Lastly, I cant swap wheel from one side to an other (ie: offside to nearside as tyres are directionnals)
Are the wheels original or have they been replaced with something else?
Remember the E39 wheels have different hub sizes by 2mm, which would cause your symptoms. Have you E39 M-Parallels on there?

You could swap the directionals, just for testing in the dry. Just don`t go out in the wet!

Ivan.
 

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Discussion Starter #5
IvanDias said:
Are the wheels original or have they been replaced with something else?
Remember the E39 wheels have different hub sizes by 2mm, which would cause your symptoms. Have you E39 M-Parallels on there?

You could swap the directionals, just for testing in the dry. Just don`t go out in the wet!

Ivan.
Hi Ivan,
No I have the Original E34 alloys 5 spokes wheels as pictured under "view my car" only differnce from the pictures are that they're in the right way now) . 17" on Dunlop Sport SP 9000.

Styve
 

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I would check for trueness of wheels. IMHO thee wheels have taken 1 hit to many and are out of round. this can be easily checked by measuring across whell in several areas or using a trammel rod.
 

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Valiers, have you tried using your spare wheel on the front and swaping sides etc?, maybe it is the tyres that are the problem, wouldn't be the first story I've heard when loads of parts are replaed only to find it was a tyre causing the problem.
Regarding your rear shocks, my SLS has been removed by a previous owner and Bilstein shock's have been fitted. Not having driven any other e34 M5 or otherwise I can't say how it compares to having the SLS working, but I find the handling of my car ok, not too snappy or unbalanced. Therefore I would suggest going for Bilstein or Koni's, or phone a company called 'Leda Suspension' who make their own stuff (I think), and get their advice.
Cheers,
Phil.
 

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it's not something as simple as the hub cetering ring from inside the aluminium wheel has come loose?


I had this happen when I changed summer aluminium wheels with steel wheels for the winter.

just a thought.

B
 

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Discussion Starter #9
Ok guys, Thank you. I will try what you have suggested so far and will let you know of my progress . Hopefully it won't be an other big bill.

Does anyone know where I could have my front shocks tested by chance ? Some kind of business that would check shock efficiency ?

Cheers :cheers:

Styve
 
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