BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > MPE Exhaust rattle on cold start

Post Reply
 
Thread Tools Search this Thread
      02-12-2020, 12:06 AM   #133
jas1598
Private
48
Rep
77
Posts

Drives: 2018 M2
Join Date: Sep 2018
Location: Portland, OR

iTrader: (0)

Yep, it is a design flaw, but my dealer agreed it sounds terrible and they are committed to fixing it. They replaced the M Performance exhaust and, of course, the rattle was still here once the tips were reinstalled. They ordered a new set of these tips, but I know they will rattle all the same when they install them tomorrow. At that point, they seem like they will cave and order the new style M2C tips with the clamps, which I believe will eliminate the noise.

Quote:
Originally Posted by ried View Post
It's normal. They literally all do this. For better or worse, it's how it was designed.

If you don't think that's the case, show us one example of an M2 + MPE that doesn't do this upon cold start.

Last edited by jas1598; 02-22-2020 at 10:34 AM..
Appreciate 0
      02-14-2020, 09:22 PM   #134
jas1598
Private
48
Rep
77
Posts

Drives: 2018 M2
Join Date: Sep 2018
Location: Portland, OR

iTrader: (0)

Update: After two weeks at the dealer and replacing both the M Performance exhaust and trying new (old style) carbon fiber tips, the dealer agreed to replace with the new style 2019 M2C carbon fiber tips. I'm pretty positive the rattle will be gone once installed.

Last edited by jas1598; 02-22-2020 at 10:34 AM..
Appreciate 0
      02-15-2020, 03:31 AM   #135
Wilsm2
Mini Beast
Wilsm2's Avatar
United Kingdom
171
Rep
360
Posts

Drives: 2018
Join Date: Nov 2017
Location: West Midlands

iTrader: (0)

Quote:
Originally Posted by jas1598 View Post
Update: After two weeks at the dealer and replacing both the M Performance exhaust and trying new (old style) carbon fiber tips, the dealer agreed to replace with the new style 2019 M2C carbon fiber tips. I'm pretty positive the rattle will be gone once installed. Very happy with my dealer that they acknowledged this was not an acceptable noise and took care of me.
Quote:
Originally Posted by jas1598 View Post
Update: After two weeks at the dealer and replacing both the M Performance exhaust and trying new (old style) carbon fiber tips, the dealer agreed to replace with the new style 2019 M2C carbon fiber tips. I'm pretty positive the rattle will be gone once installed. Very happy with my dealer that they acknowledged this was not an acceptable noise and took care of me.
Great news, keep us updated
__________________
M2 = big smile every time
Appreciate 0
      02-15-2020, 02:45 PM   #136
squixs
Private First Class
Netherlands
24
Rep
108
Posts

Drives: BMW M2 LCI
Join Date: Oct 2015
Location: netherlands

iTrader: (0)

Great news, I also need to go back to my dealer as they recently replaced them with new (old) style tips, but as expected, still with the rattle. Could you also make a picture of the tips installed on your car? Iím curious how they look
Appreciate 0
      02-15-2020, 10:42 PM   #137
Poffman
Private First Class
126
Rep
183
Posts

Drives: 2010 M3
Join Date: Jan 2017
Location: Seattle

iTrader: (1)

Had a crazy cold start rattle but no other issues when I first bought my 2018. They replaced the bushings and it was still a small rattle for a while but acceptable. Winter came and it started going nuts again on cold start (my car is garaged but passive heating, usually above 50*). One day it started a horrible noise 1700-1800 rpm's which was driving me nuts. Took it in to have it checked out and the tech put his hand over the valve solenoid on the top of the tips on the passenger side during startup and it stopped. They replaced my whole exhaust under warranty, problems gone. Said if it comes back they'll replace it again.

Nice to be taken care of, and clear they aren't willing to accept the rattle just like I'm not.
Appreciate 0
      02-22-2020, 10:31 AM   #138
jas1598
Private
48
Rep
77
Posts

Drives: 2018 M2
Join Date: Sep 2018
Location: Portland, OR

iTrader: (0)

Success! The new style 2019 M2C carbon fiber exhaust tips with clamps fixes the cold start rattle. The part # is 18302456072.

I couldn't be happier with how my dealer handled this. They went above and beyond, acknowledging from the beginning the noise wasn't acceptable. They replaced the whole exhaust system, then tried more of the old style tips, and eventually agreed to upgrade me to the new M2C version tips, which solved the 20-30 second cold start noise.

Here are some pics of the new style tips as requested. You cannot see the clamps unless you get down really low.
Attached Images
    
Appreciate 4
squixs23.50
Zuzu229.00
MR_M2421.50

      02-23-2020, 10:07 AM   #139
squixs
Private First Class
Netherlands
24
Rep
108
Posts

Drives: BMW M2 LCI
Join Date: Oct 2015
Location: netherlands

iTrader: (0)

Awesome!
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:12 PM.




m2
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST