Steering Vibration over 95mph

BMWM5NYC · 10-17-2016, 06:13 PM

Quote:

Originally Posted by IM6

Mate your suggestion has been absolute ingenious. You honestly should be rewarded by the M power department of BMW.
last night happen to take the car out to test drive and beforehand I pulled over to check on the tire pressures allround. To my surprise all 4 tires were reading between 15-25 PSI.
I topped them all up to around 38, went above the desired speed and NO vibration whatsoever

And here we are pulling all hair follicles out, almost stripped the car down but failed to check the Tire pressure.

Glad to be of help. As a HVAC tech of over 30 yrs I have learned that the most simple solution is often the right one when trying to diagnose a problem

brad850csi · 10-17-2016, 11:13 PM

Wow that is amazingly low, I'm surprised that there wasn't an obvious flex in the sidewalls or noticeable wear all round if you've been driving like that for a while.

IM6 · 10-18-2016, 05:41 AM

hi guys

God knows how we all overlooked the most fundamental things, at 38PSI the car drives even smoother on the English motorways which don't have the best of tarmacs. And even on H&R springs which I have been finding it too harsh, seemed ever so smooth.

However saying that, perhaps I have become too finicky, I noticed a very slight shudder at around 107mph. probably will get the wheels rebalanced.

Can fellow M6sers confirm that a slight rough feedback from the road surface is the characteristic of the car?

IM6 · 10-18-2016, 05:49 AM

Quote:

Originally Posted by M5 London

So when BMW fitted tyres from another brand new M6 all four were also underinflated to that magnitude ?

Do you ever check your tyre pressure monitor ?

Anyway, hope this is resolved now!!

Enjoy !

I didn't check the PSI as I thought I was in safe hands.

The other M6 must have been low, I'm not sure.

M5 London · 10-18-2016, 06:42 AM

Quote:

Originally Posted by IM6

I didn't check the PSI as I thought I was in safe hands.

The other M6 must have been low, I'm not sure.

Ok fair enough mate !

You should do the following.

Get the tyre pressure monitor up on the main screen.

Then press and hold button 3 or 4 on the central dashboard then it will save this information page to 3 or 4.

So anytime you want to monitor your tyre pressure and temps (and its good to do so, proven by your tale) then its up there straight away. One buttton and hey presto.

IM6 · 10-18-2016, 08:28 AM

Quote:

Originally Posted by M5 London

Ok fair enough mate !

You should do the following.

Get the tyre pressure monitor up on the main screen.

Then press and hold button 3 or 4 on the central dashboard then it will save this information page to 3 or 4.

So anytime you want to monitor your tyre pressure and temps (and its good to do so, proven by your tale) then its up there straight away. One buttton and hey presto.

HI

can you please explain this procedure a little more detailed please.
many thanks.

lfc3153 · 10-18-2016, 08:50 AM

Thank goodness for that! HOWEVER I would be a little careful. Firstly you shouldn't get ANY vibration at 107 mph unless as you say it was a shit uk road surface. Also what a massive coincidence that the new BMW wheels and tyres has the same pressure differential and thirdly that the tpm wasn't going berserk after changing wheels. Also that BMW didn't use the tpm to check when changing. All beyond me but then that's not too difficult these days. Try and continue your meeting with the BMW technical guy to answer some of these questions. Above all enjoy the car. Cheers

IM6 · 10-18-2016, 12:04 PM

Quote:

Originally Posted by lfc3153

Thank goodness for that! HOWEVER I would be a little careful. Firstly you shouldn't get ANY vibration at 107 mph unless as you say it was a shit uk road surface. Also what a massive coincidence that the new BMW wheels and tyres has the same pressure differential and thirdly that the tpm wasn't going berserk after changing wheels. Also that BMW didn't use the tpm to check when changing. All beyond me but then that's not too difficult these days. Try and continue your meeting with the BMW technical guy to answer some of these questions. Above all enjoy the car. Cheers

thanks mate

Jsd · 10-25-2016, 05:07 PM

Glad you managed to get it sorted, i too had this problem. vibration starts at about 90mph and goes away at about 105.

I checked tyre pressures and this didn't seem to make a difference. car went into service today so i asked them to check it out. This is what they had to say:

BMW have produced an internal publication about this issue which is quite widely reported. Because it was an internal document i was not allowed to take it away with me to show you but the tech guy read it to me while i was there.

Essentially this is an issue with the brake discs. At high temperatures the discs develop superficial cracks these usually start around the drilled areas first and begin to grow as the life of the disc wears on.

Essentially this is a fault with the disc and the cracks develop an imbalance in the wheel at certain speeds causing vibration.

apparently they have tested the discs substantially and found there to be no adverse effect on handling, safety, performance or durability of the discs or any other components.

As a result BMW deduces this is more of a cosmetic issue! they have gone so far as to EXCLUDE disc replacement under their warranty as a result of this issue.

The report the Tech was read was about 2 pages long and contained a fair amount of technobabble and jargon but this was essentially what they thought would be causing it.

hopefully this will be of some help to anyone else who has this issue. If you want more information ask your local service dealer or drop me a message. i don't mind calling them again to get another explanation and provide more in depth information.

long story short: its a known fault, its annoying but not dangerous and BMW won't fix it for free. Even if they did, i don't know if they have since changed the disc design to stop the issue recurring.

J

M5 London · 10-25-2016, 06:13 PM

Quote:

Originally Posted by Jsd

Glad you managed to get it sorted, i too had this problem. vibration starts at about 90mph and goes away at about 105.

I checked tyre pressures and this didn't seem to make a difference. car went into service today so i asked them to check it out. This is what they had to say:

BMW have produced an internal publication about this issue which is quite widely reported. Because it was an internal document i was not allowed to take it away with me to show you but the tech guy read it to me while i was there.

Essentially this is an issue with the brake discs. At high temperatures the discs develop superficial cracks these usually start around the drilled areas first and begin to grow as the life of the disc wears on.

Essentially this is a fault with the disc and the cracks develop an imbalance in the wheel at certain speeds causing vibration.

apparently they have tested the discs substantially and found there to be no adverse effect on handling, safety, performance or durability of the discs or any other components.

As a result BMW deduces this is more of a cosmetic issue! they have gone so far as to EXCLUDE disc replacement under their warranty as a result of this issue.

The report the Tech was read was about 2 pages long and contained a fair amount of technobabble and jargon but this was essentially what they thought would be causing it.

hopefully this will be of some help to anyone else who has this issue. If you want more information ask your local service dealer or drop me a message. i don't mind calling them again to get another explanation and provide more in depth information.

long story short: its a known fault, its annoying but not dangerous and BMW won't fix it for free. Even if they did, i don't know if they have since changed the disc design to stop the issue recurring.

J

Great information ! Thanks !

IM6 · 10-26-2016, 05:02 AM

To start with get all your wheels balanced at a high-tech machine. secondly depending on your build date, their has been a recall on suspension components i.e bushes, lower arms, strut arms, etc

Steerign rack has been changed on some of these vechicles too.

I will simply put this down to very poor manufacturing by BMW.

10-17-2016, 11:13 PM	#46
brad850csi Colonel 1316 Rep 2,349 Posts Drives: 16 F13 M6 Comp Join Date: Jan 2015 Location: Auckland, New Zealand iTrader: (0)	Wow that is amazingly low, I'm surprised that there wasn't an obvious flex in the sidewalls or noticeable wear all round if you've been driving like that for a while.
	Appreciate 0 Quote

10-18-2016, 05:41 AM	#47
IM6 Private First Class 30 Rep 156 Posts Drives: BMW M6 F13 Join Date: May 2016 Location: LONDON iTrader: (0)	hi guys God knows how we all overlooked the most fundamental things, at 38PSI the car drives even smoother on the English motorways which don't have the best of tarmacs. And even on H&R springs which I have been finding it too harsh, seemed ever so smooth. However saying that, perhaps I have become too finicky, I noticed a very slight shudder at around 107mph. probably will get the wheels rebalanced. Can fellow M6sers confirm that a slight rough feedback from the road surface is the characteristic of the car?
	Appreciate 0 Quote

10-18-2016, 08:50 AM	#51
lfc3153 Private First Class 20 Rep 137 Posts Drives: BMW M8 Competition Join Date: Nov 2012 Location: England iTrader: (0)	Thank goodness for that! HOWEVER I would be a little careful. Firstly you shouldn't get ANY vibration at 107 mph unless as you say it was a shit uk road surface. Also what a massive coincidence that the new BMW wheels and tyres has the same pressure differential and thirdly that the tpm wasn't going berserk after changing wheels. Also that BMW didn't use the tpm to check when changing. All beyond me but then that's not too difficult these days. Try and continue your meeting with the BMW technical guy to answer some of these questions. Above all enjoy the car. Cheers
	Appreciate 0 Quote

10-25-2016, 05:07 PM	#53
Jsd Enlisted Member 14 Rep 44 Posts Drives: F13 M6 Join Date: Feb 2016 Location: England iTrader: (0)	Glad you managed to get it sorted, i too had this problem. vibration starts at about 90mph and goes away at about 105. I checked tyre pressures and this didn't seem to make a difference. car went into service today so i asked them to check it out. This is what they had to say: BMW have produced an internal publication about this issue which is quite widely reported. Because it was an internal document i was not allowed to take it away with me to show you but the tech guy read it to me while i was there. Essentially this is an issue with the brake discs. At high temperatures the discs develop superficial cracks these usually start around the drilled areas first and begin to grow as the life of the disc wears on. Essentially this is a fault with the disc and the cracks develop an imbalance in the wheel at certain speeds causing vibration. apparently they have tested the discs substantially and found there to be no adverse effect on handling, safety, performance or durability of the discs or any other components. As a result BMW deduces this is more of a cosmetic issue! they have gone so far as to EXCLUDE disc replacement under their warranty as a result of this issue. The report the Tech was read was about 2 pages long and contained a fair amount of technobabble and jargon but this was essentially what they thought would be causing it. hopefully this will be of some help to anyone else who has this issue. If you want more information ask your local service dealer or drop me a message. i don't mind calling them again to get another explanation and provide more in depth information. long story short: its a known fault, its annoying but not dangerous and BMW won't fix it for free. Even if they did, i don't know if they have since changed the disc design to stop the issue recurring. J
	Appreciate 1 M5 London331.00 Quote

10-26-2016, 05:02 AM	#55
IM6 Private First Class 30 Rep 156 Posts Drives: BMW M6 F13 Join Date: May 2016 Location: LONDON iTrader: (0)	To start with get all your wheels balanced at a high-tech machine. secondly depending on your build date, their has been a recall on suspension components i.e bushes, lower arms, strut arms, etc Steerign rack has been changed on some of these vechicles too. I will simply put this down to very poor manufacturing by BMW.
	Appreciate 0 Quote