Minor creak (FIXED) and MPE exhaust rattle / vibration - UPDATED

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YaoNg
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Minor creak (FIXED) and MPE exhaust rattle / vibration - UPDATED

Post by YaoNg » Fri Sep 22, 2017 10:40 am

Two things that have been playing on my mind this week.

When driving with my windows up and no music I can hear a creak quite regularly from the top of the dashboard in front of my steering wheel (right by the window). I can't hear it with windows down or stereo on but now winter is approaching I know it will bother me. My M235i was absolutely silent and I've read on various threads that people felt the 2-series was better built than the 1-series. Any thoughts?

On cold starts, my exhaust is loud but I've noticed it sounds like it's slightly loose. After a while it calms down and it's fine driving around normally but curious if anyone else has had this or in fact, it's normal. I'll try and record it later, but by chance I've been invited to the dealership on Sunday for an M Performance event (Brighton) so I might get them to look at this and the creak. I am aware of the various discussions that have happened in the sibling sections of this forum, but haven't heard anything from any M2 owners.

Just curious if anyone else has noticed any of the above.
Last edited by YaoNg on Fri Jan 19, 2018 2:05 pm, edited 3 times in total.
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Re: Minor creak and exhaust rattle

Post by sawda » Fri Sep 22, 2017 11:19 am

YaoNg wrote:Two things that have been playing on my mind this week.

When driving with my windows up and no music I can hear a creak quite regularly from the top of the dashboard in front of my steering wheel (right by the window). I can't hear it with windows down or stereo on but now winter is approaching I know it will bother me. My M235i was absolutely silent and I've read on various threads that people felt the 2-series was better built than the 1-series. Any thoughts?

On cold starts, my exhaust is loud but I've noticed it sounds like it's slightly loose. After a while it calms down and it's fine driving around normally but curious if anyone else has had this or in fact, it's normal. I'll try and record it later, but by chance I've been invited to the dealership on Sunday for an M Performance event (Brighton) so I might get them to look at this and the creak. I am aware of the various discussions that have happened in the sibling sections of this forum, but haven't heard anything from any M2 owners.

Just curious if anyone else has noticed any of the above.
My exhaust had a rattle. Its normal for it to rattle a bit on cold start. Mine rattled when hitting 3,500 rpm, the bellow from the remus didnt help. Anywah after much back amd forth from bmw there is a puma case open to replace the backing discs on the breaks. No rattle amd sounds awesome now.

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Re: Minor creak and exhaust rattle

Post by YaoNg » Mon Oct 16, 2017 12:17 pm

sawda wrote:
Fri Sep 22, 2017 11:19 am
My exhaust had a rattle. Its normal for it to rattle a bit on cold start. Mine rattled when hitting 3,500 rpm, the bellow from the remus didnt help. Anywah after much back amd forth from bmw there is a puma case open to replace the backing discs on the breaks. No rattle amd sounds awesome now.

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Thanks for that. I'll feed that to the technician working on my car. He says it's actually hard to diagnose as it's so loud under the car.

The creak I was getting from the dashboard was diagnosed and he found a BMW technical article for it. Unfortunately, it's quite involved and he's had to remove the window and some of the dash to fix it. I'm a little bit worried more creaks will appear now, but at least they know that I'm bothered by this sort of stuff.
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Re: Minor creak and exhaust rattle

Post by YaoNg » Wed Oct 25, 2017 5:28 pm

:lol: Not sure if anyone cares, but I'm posting updates for anyone else that might experience this.

The only issue I have now is the exhaust rattle. My car has gone back to Chandlers Brighton for a second visit as the engineer is keen to do whatever he can. He agrees that the volume is double what it should be on a cold start due to the rattle. I'm now driving a brand new 420 convertible although I said its the wrong time of the year for it. :lol:

My MPE was slightly longer on one side than the other which meant the tips were fitted differently to ensure they were aligned perfectly. Initially it was thought this could be the cause of the rattle as removing the tips silenced the rattle, but a new MPE has now been fitted and although it also suffers a discrepancy in lengths it's not as severe and the rattle is still present if not slightly reduced.

The current thought is that it's not the manufacturing discrepancy but the tips that could be the cause and as the new ones are pushed back as far as possible and the rattle is still present. Similar to the first time round it's expected it will get worse over time.

So, it's ongoing with a PUMA case and there is a regional technical director in town this week so there is hope he will take a look as well.

Yao
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Re: Minor creak and exhaust rattle

Post by YaoNg » Thu Oct 26, 2017 2:05 pm

So, it looks like there isn't much that can be done for the moment. I will raise a complaint with BMW Customer Service purely about the fact that buying a performance exhaust for better sound should not rattle like this. I think the fact that other MPEs don't do this (M235i MPE was flawless) and that people are upgrading their x35/x40s to MPEs to resolve the stock rattle is a good comparison for the issue I have.

The engineer I used was excellent and his personal opinion is the same as mine. It's not acceptable but he can't do anymore. This is the response I received today...

"I've had a look at the car this morning with our Regional Technical Director. He has informed me that they are aware of this concern from customers, and there is an on going investigation into it. They are however suggesting at this point that it is consistent with other M2's with the MPE fitted, and as such there is not currently a cure for the noise, it is just a feature of the exhaust.

They have replaced exhausts for previous customers, in some cases the noise was rectified for a period of time before returning and in other cases it was present immediately when fitting the new exhaust - as is the case with your car. They have also tried the Titanium tips and found that they are similar. There was also a suggestion that any cars that do not exhibit the noise will do at some point.

[The regional technical director] also informed me that actually there was a noise complaint with the factory exhausts, again this was put down to 'normal' operation. I think at this point we will have to accept BMW's decision, which is ultimately it is a sports car with performance accessories which may compromise comfort for performance.

Of course if you are not happy with this decision you can speak directly to BMW customer services, but I cant do anymore from here. I will of course check with [the regional technical director] periodically to see if they have made any progress with it, but there are a number of factors that determine how much BMW work towards a resolution, if at all.

I have made some adjustments to the exhaust this morning and improved the noise considerably, I think given that it's not possible to eliminate it completely it is now at an acceptable level."

I'm still happy with my MPE, but for the time being the cold starts may have a loud rattle to it.
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Re: Minor creak and MPE exhaust rattle

Post by 692DPG » Thu Oct 26, 2017 8:02 pm

Thanks for the update - even though I don't have an MPE it's useful to understand BMW's position in these cases.

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Re: Minor creak and MPE exhaust rattle

Post by Deadeye » Fri Nov 03, 2017 1:46 pm

This thing behind the dash - is it an irregular snap sound? Like your hitting random massive bumble-Bees on the windscreen?
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Re: Minor creak and exhaust rattle

Post by Dajonah » Fri Nov 03, 2017 7:46 pm

[/quote]

The creak I was getting from the dashboard was diagnosed and he found a BMW technical article for it. Unfortunately, it's quite involved and he's had to remove the window and some of the dash to fix it. I'm a little bit worried more creaks will appear now, but at least they know that I'm bothered by this sort of stuff.
[/quote]

Was the creaking/ cracking noise anything to do with a spot weld by any chance?
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Re: Minor creak and MPE exhaust rattle

Post by YaoNg » Mon Nov 06, 2017 9:47 am

Deadeye wrote:
Fri Nov 03, 2017 1:46 pm
This thing behind the dash - is it an irregular snap sound? Like your hitting random massive bumble-Bees on the windscreen?
It was a like a snap / loud creak, but definitely NOT like bumble bees on the windscreen. A creak is probably the best way to describe it.
Dajonah wrote:
Fri Nov 03, 2017 7:46 pm

Was the creaking/ cracking noise anything to do with a spot weld by any chance?
I don't know but he said it was related to the corner section which can be slightly loose and needs to be firmed up or secured better. I'll ask the engineer and get back to you.
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Re: Minor creak and MPE exhaust rattle

Post by YaoNg » Wed Jan 10, 2018 2:55 pm

It's been a while, but thought I'd update this as I think it could be useful for others.

So, in December when we got our first cold snap I started hearing the faint but recognisable sound of the M2 MPE exhaust rattle. Fortunately, it wasn't that loud and therefore I ignored it. However, two weeks ago the rattle began and this time it is so loud it sounds like a metallic vibration. Additionally, I can hear it as I am driving about (accelerating specifically) which is embarrassing. It sounds like a faulty exhaust.

I've complained to BMW for a second time and I've now been offered financial compensation which has yet to be agreed, but they've also offered to remove the tips. Since BMW have no resolution for this I will have to scour forums and discuss with others who have experienced the same problem how they addressed it. One other M2 owner said that he still had the issue after removing the tips which is interesting so this may require much trial and error and/or an exhaust specialist.

I'll post some videos up when I get a moment. For the record, the engineer I liaise with at BMW Chandlers Brighton has been excellent and very sympathetic to my concerns. He's also spent a lot of time diagnosing, speaking with BMW tech, their regional technical director, and submitted all the paperwork to obtain some financial rebate. At the end of the day, that's what I expect from a dealership.
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Re: Minor creak and MPE exhaust rattle (TIPS or no TIPS)

Post by TerryCTR » Wed Jan 10, 2018 8:21 pm

Not good, puts me off the MPE.....for now!
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Re: Minor creak (FIXED) and MPE exhaust rattle / vibration - UPDATED

Post by YaoNg » Fri Jan 19, 2018 2:13 pm

I hope people don't mind me sharing and updating on this. I think enough people are experiencing it that any information might help them, their dealership, and provide some possible resolution to it.

One thing that I am absolutely adamant about is if you are experiencing a loud vibration or rattle on your M2 MPE exhaust, please complain to BMW. It may result in a monetary rebate or replacement exhaust (problem would come back). I've had the replacement and now a rebate, but I'd rather troubleshoot this and look for a resolution with BMW and others as I do love the sound of my exhaust. Make sure you submit any videos you have as well.

In summary:

1. Some people feel the problem is caused by the connection between the MPE and original pipe. The dealerships are trying to address this via different or tighter bolts

2. When my car is on an incline (facing upwards or downwards down) the vibration will more likely occur, especially if you have a cold start. Rolling reverse off my drive on a cold start triggers a loud vibration

3. When driving the vibration usually occurs between 1500 and 2000 revs. Other members have concurred with this

4. I have an MPE v3 (latest iteration) which has a slide over connection where MPE joins existing cut front pipe. This joint and clamp is potentially more robust but there are questions if the tips are also fixed. Thanks for BP for helping me identify this.

5. From above it appears there are potential two causes and possible both at the same time. The connection between MPE and pipe and/or the MPE tips.

6. One member managed to secure this tips using aluminium tape which seems to have worked so far - his tips were rattling

Thanks to Blind Pugh for helping me take a look once I got my car on the ramp. I'm also going back to my dealership with the above and apparently BMW are becoming very aware of this issue now (everyone needs to keep complaining and submitting videos).
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Re: Minor creak (FIXED) and MPE exhaust rattle / vibration - UPDATED

Post by NISFAN » Fri Jan 19, 2018 11:21 pm

Exhaust needs a weight damper. There is a lot of resonant vibration during cold start (1500-2000rpm)


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Re: Minor creak (FIXED) and MPE exhaust rattle / vibration - UPDATED

Post by Blind Pugh » Sat Jan 20, 2018 7:43 am

NISFAN wrote:
Fri Jan 19, 2018 11:21 pm
Exhaust needs a weight damper. There is a lot of resonant vibration during cold start (1500-2000rpm)
Nisfan

Correct - I was underneath Yao’s car this week - whilst it was up on the ramp - and confirmed he still has the weight damper installed as it’s on the OE front pipe fwd of the joint to MPE.

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Re: Minor creak and exhaust rattle

Post by cadmunkey » Wed Feb 28, 2018 3:35 pm

YaoNg wrote:
Mon Oct 16, 2017 12:17 pm
The creak I was getting from the dashboard was diagnosed and he found a BMW technical article for it. Unfortunately, it's quite involved and he's had to remove the window and some of the dash to fix it. I'm a little bit worried more creaks will appear now, but at least they know that I'm bothered by this sort of stuff.
Sorry to drag up an old thread but I remember reading this a while ago and mine has started doing the exact same thing. I thought it was the usual BMW door rattle, but being partially deaf I cant tell which direction sounds come from. So got the wife in the car and went for a drive and she says it is definitely coming from behind the dash in the corner near the wheel.
How long did it take them to sort yours out, and if I report this to my local dealer will they know how to fix it seeing as there is a technical article about it already? I'm pretty OCD about my car, the thought of them having to remove windows/dash fills me with dread imagining all the scratches they will probably inflict on the interior :shock:

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