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      11-22-2014, 12:12 AM   #1
silencer2008
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M Performance exhaust rattle at low revs

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Anyone seen this issue? Installed right after delivery and had this issue ever since. Curious to know what could be causing it, checked heat shields and exhaust hangars, not rattling against that. Possible manufacturing issue? Its a 335i M Performance Exhaust fitted to a 328i.



Thanks in advance
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Last edited by silencer2008; 11-22-2014 at 12:22 AM.
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      11-22-2014, 01:57 AM   #2
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hey i remember reading a post a while back about people with 328s with rattling exhausts. In the post he has a video of the thing rattling at idle i believe. Im sure a search will pull up that post. I think he ended up getting the middle part of his exhaust replaced at the dealer.
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      11-22-2014, 04:01 AM   #3
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Quote:
Originally Posted by ji99lypuff View Post
hey i remember reading a post a while back about people with 328s with rattling exhausts. In the post he has a video of the thing rattling at idle i believe. Im sure a search will pull up that post. I think he ended up getting the middle part of his exhaust replaced at the dealer.
Hi, I did have a look around regarding the exhaust flap. This does not seem to be the issue because unplugging the flap still caused the rattle. My drivers side is on the right side, away from the flap and this is where the rattle is happening. All the videos I've seen so far have issues on the left side, and because the flap is on the left (left side drive) it makes sense for the flap to be problematic for US cars.
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      11-22-2014, 04:49 AM   #4
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That could be the pipe not being fixed enough. I have the old style tips on my 335i MPE, the ones that were spot welded, and when it was new one of the pipes sounded similar to this. Put 3 more spots on it and it got silent. So, it might be that the end pipe isnt 100% fixated.
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      11-22-2014, 08:50 AM   #5
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God that sounds heroine, almost sounds like something internal like a baffle or something is loose. I'm not an exhaust expert by any means tho. Hope you get it resolved cause I'd love to hear some good videos of the 335 MPE on a 328
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      11-22-2014, 03:00 PM   #6
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Try banging around on the exhaust/muffler with the car off to see if you can replicate and pinpoint where to sound is coming from.
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      11-23-2014, 04:52 AM   #7
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http://f30.bimmerpost.com/forums/sho...exhaust+rattle

thats the link i read a while back. Maybe that can be of some help
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      11-23-2014, 09:30 AM   #8
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Quote:
Originally Posted by ji99lypuff View Post
http://f30.bimmerpost.com/forums/sho...exhaust+rattle

thats the link i read a while back. Maybe that can be of some help

Ahhhhh...how did I miss that.....thanks so much !!!
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      11-26-2014, 08:43 AM   #9
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loose baffle, getting it replaced under warranty all good....
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      11-26-2014, 11:59 PM   #10
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Quote:
Originally Posted by silencer2008 View Post
loose baffle, getting it replaced under warranty all good....
Was your muffler installed at the dealer since they are covering it under warranty?
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      11-27-2014, 04:25 AM   #11
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Quote:
Originally Posted by Tothepoint View Post
Was your muffler installed at the dealer since they are covering it under warranty?
The exhaust is not approved in Australia. I bought it from a well known BMW mod shop and got it installed. Showed the video to the shop and they agreed to get it replaced.
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      12-01-2014, 01:06 AM   #12
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335 MPE on a 328? I want to try that because of the split rear exhaust. how does it sound compared to the 328mpe? Is this recommended? what's the difference between the two?
thanks
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      12-01-2014, 04:43 AM   #13
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Quote:
Originally Posted by S1LV3RSAMURA1 View Post
335 MPE on a 328? I want to try that because of the split rear exhaust. how does it sound compared to the 328mpe? Is this recommended? what's the difference between the two?
thanks
Getting the new exhaust installed this Saturday. Will post a proper video for comparison
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      12-01-2014, 11:54 PM   #14
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sweet.
thanks mate
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      12-02-2014, 05:21 AM   #15
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I HAD a video. key word is had... but, I can only say DO IT! itīs perfect and much better than any other option cause you still have the flap which helps reduce the sound when needed, cause when itīs open it will be a bit too loud for anyone sitting in the back (got wife and kids and only put transmission in sport when theyīre not in, and that way I can fully enjoy the sweet sound). At least in the Touring, perhaps the sedan is better damped because of the body difference..
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