Loud banging noise

1stm3f80 · 08-07-2014, 05:25 PM

I have heard a loud clanging noise a few times coming from left rear of my M3 (96 miles) should I be concerned.

solstice · 08-08-2014, 02:08 AM

My guess is no. The new LSD is rough. It clunks, clangs, jolts and bangs if not treated to it's liking which is seems about as easy to understand as a woman

accce · 08-08-2014, 07:31 AM

What is my 60 mike new?

1stm3f80 · 08-08-2014, 08:40 AM

More of a clang than anything else even at very low speed.

jbtco · 08-08-2014, 10:59 AM

I have had mine a month and covered 800 miles. In the last week I have noticed a noise as you describe on 3 occasions. It happens at low low speed and lasts only a few seconds then completely disappears. It happened this afternoon after a 50 mile brisk run on country roads then a drive into a small town for a couple of miles at 30mph. I went round a roundabout took 3rd exit on the left (I am in the UK) drove about 30 yards then turned right into a supermarket car park when the clanging occurred. Parked car briefly then travelled a couple of miles to a large empty car park near where I live and tried to recreate the noise with no success. On previous occasions travelling at less than 30mph in a straight line.

1stm3f80 · 08-08-2014, 11:04 AM

Quote:

Originally Posted by jbtco

I have had mine a month and covered 800 miles. In the last week I have noticed a noise as you describe on 3 occasions. It happens at low low speed and lasts only a few seconds then completely disappears. It happened this afternoon after a 50 mile brisk run on country roads then a drive into a small town for a couple of miles at 30mph. I went round a roundabout took 3rd exit on the left (I am in the UK) drove about 30 yards then turned right into a supermarket car park when the clanging occurred. Parked car briefly then travelled a couple of miles to a large empty car park near where I live and tried to recreate the noise with no success. On previous occasions travelling at less than 30mph in a straight line.

Same thing here. Can't get it to make the noise again either. Prob nothing!! ... I hope

Riky · 08-10-2014, 02:15 AM

I had the exact same thing happen to me twice yesterday.

First I was driving in normal traffic in a slight bend when I heard the sound. It sounded like someone threw a buch of empty coke cans on the road. So I looked in my rear view mirror to check if that was the case, but didn't see anything. So I assumed it was something else. I also thought I could be someone extracting a large aluminum ladder nearby, cause that could sound about the same.

About 10 km further I turned in to a narrow street quite slowly and heard the exact same noise. I stopped to check under the car to see the exhaust wasn't coming of something like that

.

Didn't see anything.

Dove home and haven't heard it since.

WAY · 08-10-2014, 03:07 AM

When I drove the M5 for the first time, that noise really put me off. What I now know is that this is the sound of the new electronically controlled LSD. The F80/82 has the identical unit to the M5 so I'm not surprised to hear the same thing in my F80. Doesn't sound as loud as I remembered it in the M5 though.

Greg P · 08-10-2014, 03:21 AM

Quote:

Originally Posted by Riky

I had the exact same thing happen to me twice yesterday.

First I was driving in normal traffic in a slight bend when I heard the sound. It sounded like someone threw a buch of empty coke cans on the road. So I looked in my rear view mirror to check if that was the case, but didn't see anything. So I assumed it was something else. I also thought I could be someone extracting a large aluminum ladder nearby, cause that could sound about the same.

About 10 km further I turned in to a narrow street quite slowly and heard the exact same noise. I stopped to check under the car to see the exhaust wasn't coming of something like that

.

Didn't see anything.

Dove home and haven't heard it since.

Used to get the "coke can" noise from the rear of my E92 M3, used to come and go over the 6.5 years I had her. Never turned into anything more than an irritation, hope this is the same on the F8x and not anything more sinister.

Riky · 08-10-2014, 05:05 AM

Quote:

Originally Posted by Greg P

Used to get the "coke can" noise from the rear of my E92 M3, used to come and go over the 6.5 years I had her. Never turned into anything more than an irritation, hope this is the same on the F8x and not anything more sinister.

I sure hope so. The sound was really loud though so I wonder if this something I can get used to.

Time will tell.

jbtco · 08-10-2014, 08:17 AM

Quote:

Originally Posted by Riky

I sure hope so. The sound was really loud though so I wonder if this something I can get used to.

Time will tell.

Exactly describes the noise I have had. I wondered if it was something to do with the exhaust.

boogie1 · 08-10-2014, 09:05 AM

That sucks I hate weird noises, when the e92 would start up in cold weather I honestly didn't even want to drive the car. Then they told me oh its normal, well to me no its not normal, never have I had a car make that noise before and why didn't the car do it til 30k miles if it was normal.all I know if it were new like that when I drove it I wouldn't of bought it then I got stuck w it doing that.

Sir Loin · 08-10-2014, 09:46 AM

500+ miles so far and I have not heard any banging noise from the rear yet. Now that I have said it, I am sure I will hear it today.

With my old E46 M3, it had some grinding noise from the diff from time to time. All I had to do was to do a bunch of figure-8s in a parking lot and it goes away for a long time. The figure-8s helped to lube the gears in the diff. Not sure if this would help in the new electronically controlled LSD. The old one had a mechanical LSD.

purdyawesome · 08-10-2014, 10:23 AM

These high performance differentials are likely to make all sorts of unsettling sounds on turns- particularly tight turns at low speeds on a dry surface- nature of the beast. If some of you drove my Wrangler - that has ARB air lockers- the sounds would horrify you. Just good technology sounding off in appreciation.

M4UK · 09-08-2014, 02:38 PM

Same here guys!

I have done 100 miles in the M4 and have had very brief & slight grinding noises, very occasionally. Not enough to worry about.

I then had a rather worrying spell. I was driving along the road and I heard what sounded like driving over 3 loose metal road manhole covers in succession - a couple of seconds apart. On the final one a loud grating noise followed and I actually stopped the car to look underneath - nothing there. I drove the car home fine without noise and the next day with no problems?

Part of me thinks that amount of noise must be something, but fine since?

I checked the quick reference and full manuals and found these two interesting references in each document referring to the 'Drive train'

They are worth a read but quote that the direct connection between engine and drive system can lead to acoustic feedback of the torque when load off and to expect clattering or clacking noise which is of no concern.

Thoughts?

1stm3f80 · 09-08-2014, 10:59 PM

I hear it all the time metallic clanging noise. Not worried.

Andrew115 · 09-08-2014, 11:04 PM

Quote:

Originally Posted by Sir Loin

500+ miles so far and I have not heard any banging noise from the rear yet. Now that I have said it, I am sure I will hear it today.

With my old E46 M3, it had some grinding noise from the diff from time to time. All I had to do was to do a bunch of figure-8s in a parking lot and it goes away for a long time. The figure-8s helped to lube the gears in the diff. Not sure if this would help in the new electronically controlled LSD. The old one had a mechanical LSD.

Silverstone luck! It's a good thing

M_Dream · 09-09-2014, 12:40 AM

And here I thought I was going crazy! I've had the car for about a 45 days now and i've heard the sound bout 3 times about the second week of having the car. The car has 2600miles already haven't heard it in a while now.

Racer20 · 09-09-2014, 07:17 AM

I've had the sound a few times over the first 2000 miles as well, within the first hundred feet from starting from a stop at a light or something. It doesn't appear to affect the way the car drives, so I'm not that worried about it, but I would like to know what it is.

Let's be more specific on describing the sound . . . mine is a metallic clanging noise almost like a small heat shield falling off or something. I wouldn't call it a bang. It doesn't SOUND like it's diff related, otherwise it would be heavier.

Oakleyguy · 09-09-2014, 07:25 AM

I experienced this as well. Mostly likely drivetrain lashing.

To recreate it, coasting in high gear at a low speed, upon application of throttle you'll get a clunk from the rear. Just play in the drivetrain, all vehicles have it. It's just more noticeable with the solid subframe mounts on this car.

Racer20 · 09-09-2014, 07:30 AM

It's not drive train lash. Yes, this car has some of that, and BMW says in the manual that it's normal for this car. It happens at low speeds and low powertrain load.

Oakleyguy · 09-09-2014, 07:39 AM

Quote:

Originally Posted by Racer20

It's not drive train lash. Yes, this car has some of that, and BMW says in the manual that it's normal for this car. It happens at low speeds and low powertrain load.

Are you estimating the sound to be internal to the diff itself?

08-07-2014, 05:25 PM	#1
1stm3f80 First Lieutenant 48 Rep 380 Posts Drives: F80 ///M3 Join Date: Apr 2014 Location: San Diego iTrader: (0)	I have heard a loud clanging noise a few times coming from left rear of my M3 (96 miles) should I be concerned.
	Appreciate 0 Tweet Quote

08-08-2014, 02:08 AM	#2
solstice Major General 5459 Rep 7,037 Posts Drives: 2015 M3 6MT Join Date: May 2013 Location: Seattle iTrader: (0)	My guess is no. The new LSD is rough. It clunks, clangs, jolts and bangs if not treated to it's liking which is seems about as easy to understand as a woman
	Appreciate 0 Quote

08-08-2014, 07:31 AM	#3
accce Lieutenant 73 Rep 495 Posts Drives: M4 SBM/BLK EXT CC Brakes Join Date: May 2011 Location: MD iTrader: (0)	What is my 60 mike new?
	Appreciate 0 Quote

08-08-2014, 08:40 AM	#4
1stm3f80 First Lieutenant 48 Rep 380 Posts Drives: F80 ///M3 Join Date: Apr 2014 Location: San Diego iTrader: (0)	More of a clang than anything else even at very low speed.
	Appreciate 0 Quote

08-08-2014, 10:59 AM	#5
jbtco Captain 163 Rep 641 Posts Drives: F80 M3 Join Date: Nov 2008 Location: Scotland iTrader: (0)	I have had mine a month and covered 800 miles. In the last week I have noticed a noise as you describe on 3 occasions. It happens at low low speed and lasts only a few seconds then completely disappears. It happened this afternoon after a 50 mile brisk run on country roads then a drive into a small town for a couple of miles at 30mph. I went round a roundabout took 3rd exit on the left (I am in the UK) drove about 30 yards then turned right into a supermarket car park when the clanging occurred. Parked car briefly then travelled a couple of miles to a large empty car park near where I live and tried to recreate the noise with no success. On previous occasions travelling at less than 30mph in a straight line.
	Appreciate 0 Quote

08-10-2014, 02:15 AM	#7
Riky Private 141 Rep 81 Posts Drives: 1M+G30 540i+Ginetta G55&G50 Join Date: Mar 2012 Location: Belgium iTrader: (0)	I had the exact same thing happen to me twice yesterday. First I was driving in normal traffic in a slight bend when I heard the sound. It sounded like someone threw a buch of empty coke cans on the road. So I looked in my rear view mirror to check if that was the case, but didn't see anything. So I assumed it was something else. I also thought I could be someone extracting a large aluminum ladder nearby, cause that could sound about the same. About 10 km further I turned in to a narrow street quite slowly and heard the exact same noise. I stopped to check under the car to see the exhaust wasn't coming of something like that. Didn't see anything. Dove home and haven't heard it since.
	Appreciate 0 Quote

08-10-2014, 03:07 AM	#8
WAY Brigadier General 458 Rep 4,822 Posts Drives: Fast ones Join Date: Jul 2007 Location: Melbourne, Australia iTrader: (0)	When I drove the M5 for the first time, that noise really put me off. What I now know is that this is the sound of the new electronically controlled LSD. The F80/82 has the identical unit to the M5 so I'm not surprised to hear the same thing in my F80. Doesn't sound as loud as I remembered it in the M5 though.
	Appreciate 0 Quote

08-10-2014, 09:05 AM	#12
boogie1 Private First Class 16 Rep 123 Posts Drives: m3 Join Date: Jun 2014 Location: dallas iTrader: (0)	That sucks I hate weird noises, when the e92 would start up in cold weather I honestly didn't even want to drive the car. Then they told me oh its normal, well to me no its not normal, never have I had a car make that noise before and why didn't the car do it til 30k miles if it was normal.all I know if it were new like that when I drove it I wouldn't of bought it then I got stuck w it doing that.
	Appreciate 0 Quote

08-10-2014, 09:46 AM	#13
Sir Loin M3AT LOVER 322 Rep 1,853 Posts Drives: Silverstone F80 M3 Join Date: Aug 2013 Location: Seattle iTrader: (0)	500+ miles so far and I have not heard any banging noise from the rear yet. Now that I have said it, I am sure I will hear it today. With my old E46 M3, it had some grinding noise from the diff from time to time. All I had to do was to do a bunch of figure-8s in a parking lot and it goes away for a long time. The figure-8s helped to lube the gears in the diff. Not sure if this would help in the new electronically controlled LSD. The old one had a mechanical LSD. __________________ 2015 F80 M3 \| SSII ext SO int \| M-DCT \| 19" Black Wheels
	Appreciate 0 Quote

08-10-2014, 10:23 AM	#14
purdyawesome Private First Class 26 Rep 184 Posts Drives: 2015 F80 M3, 2014 F15 X5 Join Date: May 2014 Location: Chicago iTrader: (0)	These high performance differentials are likely to make all sorts of unsettling sounds on turns- particularly tight turns at low speeds on a dry surface- nature of the beast. If some of you drove my Wrangler - that has ARB air lockers- the sounds would horrify you. Just good technology sounding off in appreciation.
	Appreciate 0 Quote

09-08-2014, 02:38 PM	#15
M4UK Private First Class 40 Rep 112 Posts Drives: M4 Black Join Date: Sep 2014 Location: UK iTrader: (0)	M4 Clattering or Clacking noise! Same here guys! I have done 100 miles in the M4 and have had very brief & slight grinding noises, very occasionally. Not enough to worry about. I then had a rather worrying spell. I was driving along the road and I heard what sounded like driving over 3 loose metal road manhole covers in succession - a couple of seconds apart. On the final one a loud grating noise followed and I actually stopped the car to look underneath - nothing there. I drove the car home fine without noise and the next day with no problems? Part of me thinks that amount of noise must be something, but fine since? I checked the quick reference and full manuals and found these two interesting references in each document referring to the 'Drive train' They are worth a read but quote that the direct connection between engine and drive system can lead to acoustic feedback of the torque when load off and to expect clattering or clacking noise which is of no concern. Thoughts?
	Appreciate 0 Quote

09-08-2014, 10:59 PM	#16
1stm3f80 First Lieutenant 48 Rep 380 Posts Drives: F80 ///M3 Join Date: Apr 2014 Location: San Diego iTrader: (0)	I hear it all the time metallic clanging noise. Not worried.
	Appreciate 0 Quote

09-09-2014, 12:40 AM	#18
M_Dream New Member 2 Rep 10 Posts Drives: '15 F80 M3 MG Join Date: Jul 2014 Location: Secaucus NJ iTrader: (0)	And here I thought I was going crazy! I've had the car for about a 45 days now and i've heard the sound bout 3 times about the second week of having the car. The car has 2600miles already haven't heard it in a while now.
	Appreciate 0 Quote

09-09-2014, 07:17 AM	#19
Racer20 Major 1030 Rep 1,190 Posts Drives: F80 M3, 228i THP, E46 ZHP Join Date: May 2009 Location: Ann Arbor, MI iTrader: (0)	I've had the sound a few times over the first 2000 miles as well, within the first hundred feet from starting from a stop at a light or something. It doesn't appear to affect the way the car drives, so I'm not that worried about it, but I would like to know what it is. Let's be more specific on describing the sound . . . mine is a metallic clanging noise almost like a small heat shield falling off or something. I wouldn't call it a bang. It doesn't SOUND like it's diff related, otherwise it would be heavier. __________________ 2015 M3, 2005 330i ZHP, 2015 228i 6MT Track Handling Pack, 2007 M Coupe (Sold)
	Appreciate 0 Quote

09-09-2014, 07:25 AM	#20
Oakleyguy Resident Engineer 135 Rep 748 Posts Drives: Land Cruiser Join Date: Oct 2008 Location: Denver, CO / Tulsa, OK iTrader: (0) Garage List 2014 Toyota URJ200 [0.00] 2017 BMW M2 [0.00] 2015 BMW M4 [10.00] 2005 Toyota UZJ100 [0.00]	I experienced this as well. Mostly likely drivetrain lashing. To recreate it, coasting in high gear at a low speed, upon application of throttle you'll get a clunk from the rear. Just play in the drivetrain, all vehicles have it. It's just more noticeable with the solid subframe mounts on this car. __________________ ///M4 (SO/BLK/BLK) Exec, LED, Blk 19s, HK, 6MT <- SOLD ///M2 (LBB), Exec, 6MT <- SOLD 2014 Land Cruiser, Slee Sliders, OME Lift, ARB Onboard Air European Delivery Journal & F8X Door Rattle Fix Machine Shop Directory - www.mfgcenter.com
	Appreciate 0 Quote

09-09-2014, 07:30 AM	#21
Racer20 Major 1030 Rep 1,190 Posts Drives: F80 M3, 228i THP, E46 ZHP Join Date: May 2009 Location: Ann Arbor, MI iTrader: (0)	It's not drive train lash. Yes, this car has some of that, and BMW says in the manual that it's normal for this car. It happens at low speeds and low powertrain load. __________________ 2015 M3, 2005 330i ZHP, 2015 228i 6MT Track Handling Pack, 2007 M Coupe (Sold)
	Appreciate 0 Quote