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Discussion Starter · #1 ·
As above,

I have this noise that presents when under load at slow speeds - 1st and 2nd gear - although could be there at higher speeds but unable to hear with other noises. I can replicate the noise if I rock the car forward and back (1st and reverse gears). I thought it may be anti roll bars, but it is only there when the car is under load - ie not when going over bumps at a constant speed or with car out of gear.

Seems to be coming from the centre of the car forward - had it in the local garage this morning, (I thought it was coming from rear but obviously the sound was being transmitted to the rear)
The tech couldn't pinpoint the exact area that it was coming from, needs to drop exhaust and remove heatshield. He feels it's either the bush/bearing holding the middle of the propshaft, or a gearbox noise:eek:oohhh:!!! I have got it booked in for thursday, but just wondered if anyone had and ideas or been here before?

Steve
 

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"tincling" noise (always wondered how to spell that...) is a pretty 'light' noise, and I'd suggest that it is the exhaust alignment/hangers/heat shield...

a 'knock' is something else, speaks to a more substantial connection/member. guibo/center bushing.

Hard to trouble shoot those from here...good luck

A
 

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Its the center driveshaft bearing. Very common and not an exspensive part. It can be a bugger to get out though as it is put on the spline cold. Sometimes you need to bring the driveshaft to a machine shop to remove the old worn bearing. Hope this helps.
 

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Discussion Starter · #4 ·
"tincling" noise (always wondered how to spell that...) is a pretty 'light' noise, and I'd suggest that it is the exhaust alignment/hangers/heat shield...
Sorry, my speling is apaling!!!

It is a light tinkling type noise, we have ruled out the exhaust hangers.

TCM:
"Its the center driveshaft bearing"

That is the third time someone has suggested it, so hopefully will get sorted this week!

I will keep you posted.

Thanks once again

Steve
 

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I had this. I had the drive shaft centre bearing replaced and main UJ bearings rebuilt by a specialist. It turned out to be the splines had rounded off edges at either end so the shaft was rotating slightly inside itself. (I hope that makes sense?!)

Ideally I'd have replaced the whole shaft but that's over £600 from BMW so went with £50 part and bit of labour. The whole thing came to about £200 if memory serves. (you have to remove the whole exhaust & heat shield etc).
This way the outside/female 'half' of the splines are now new and nice and square edged, which has stopped any noise despite the male part of the splines on the shaft still being rounded off.

I understand that this is down to excessive spinning of the rear wheels and hard acceleration by the previous owner....... (I'm just waiting for the diff to go bang now!)

Cheers,
Barney.
 

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I agree with 100%

Mate,

I had the marbles in a jar at low speed in first and second. You cant hear it when you are going faster due to tyre roar and wind noise. Also, because you dont tend to wind as much lock on the steering at higher speeds.....unless the DSC is off:haha:

It turned out to be the front drivers side wheel bearings which needed to be replaced.

BMW also replaced the bushes on the antiroll which had also perished

Total cost - #600 at the dealers. Sorry dude.

If its any concilation, it drives brilliantly now and feels really planted in the front.

Cheers

TrickyTrev :M5launch:
 

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Discussion Starter · #7 ·
Well the tech dropped exhaust and took heat sheilding off, put exhaust back on and called me in.

The noise seems to be coming from the 'knuckle' joint area in the prop shaft. He said may be worth trying the centre propshaft bearing 1st but seems to be excessive play in the knuckle joint! So probably will require a new prop shaft!

He is dropping the prop shaft off today and I will go and have a look once it's off.

I will keep you posted

Steve
 

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Well the tech dropped exhaust and took heat sheilding off, put exhaust back on and called me in.

The noise seems to be coming from the 'knuckle' joint area in the prop shaft. He said may be worth trying the centre propshaft bearing 1st but seems to be excessive play in the knuckle joint! So probably will require a new prop shaft!

He is dropping the prop shaft off today and I will go and have a look once it's off.

I will keep you posted

Steve
The excessive play can be cured by the UJ rebuild..... Are you in the South East? If so, give Phil Crouch a call on 07960280953. He's an M5 guru type tech guy and services my car. He had the bearings done by a local bearing specialist.
 

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Discussion Starter · #9 ·
Thanks 100%, but I am in Birmingham so no go! Cars in the shop at the mo:



Looks like we are going to change the middle support bearing and the bearing connecting prop to diff as gater split. Hopefully this will sort the problem.

When the middle support bearing is rocked slightly is does make a slight 'clicking' noise, the UJ looks and feels ok, but how can you simulate 400Bhp going throught it!

When the gearbox is turned it does rock from side to side before the gears are engaged, but this is fairly normal to have this 'play' in a gearbox.

Just got to wait for BMW® to get the parts in, then it's fingers crossed that we have cured the problem.

Steve
 

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While you have the stock exhaust off might as well put something shiny in its place :D

I've had this same noise so it will be interesting to see if this cures the problem.
 

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fingers crossed it is something simple and a first time fix for you!

i learn something new everytime i come on this board!

cheers
 

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Discussion Starter · #12 ·
Its the center driveshaft bearing. Very common and not an exspensive part. It can be a bugger to get out though as it is put on the spline cold. Sometimes you need to bring the driveshaft to a machine shop to remove the old worn bearing. Hope this helps.

Many Thanks T.C - you hit the nail on the head! :cheers:

Well, £440 lighter in my wallett but car is fixed!
The noise was coming from the centre support bearing - you could see where the bearing had been moving in the bracket. Also replaced bearing from prop to diff (as gaiter was split).

Glad to have her back.
Roll on next Thursday - Le-Mans 1000mile road trip! :M5launch:

Steve
 

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Steve,

Glad to see everything worked out well for you. Did you guys have a hard time removing the bearing? We usually do when they are worn and cracking. Now Ij ust have to replace my own- as it sounds awful...
 

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Discussion Starter · #14 ·
Steve,

Glad to see everything worked out well for you. Did you guys have a hard time removing the bearing? We usually do when they are worn and cracking. Now Ij ust have to replace my own- as it sounds awful...
He said it wasn't the easiest job he had done, but didn't particularly make reference to it being a pig to get off! He did say that it was that worn that the bearing+support bracket almost fell apart!

But £290 labour - at I think around £50ish means it may take you a while (obviously that included diagnosing fault and changing the rear bearing aswell)

Steve
 

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I have a metallic clicking noise while going over bumps

Does anyone know what that is? I suspect it has something to do with my suspension or wheel bearings, but everything sounds fine when I'm not going over bumps or a lumpy part in the road.
 

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