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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Exhaust Flap Rattle

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      04-12-2019, 11:44 AM   #23
sethwas
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Quote:
Originally Posted by Joe T. View Post
The dealership also quoted a hilarious $90 to install it..
They quoted you a price to do a recall/under warranty work?

Seth
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      04-12-2019, 09:37 PM   #24
Joe T.
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Quote:
Originally Posted by sethwas View Post
They quoted you a price to do a recall/under warranty work?

Seth
I don't think it had been recalled yet and the car was just out of the factory warranty. I just laughed it off and wired the flap open myself.
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      04-15-2019, 09:45 AM   #25
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Originally Posted by Climate Changer View Post
Quote:
Originally Posted by Joe T. View Post
I had the pin break on my old 228 before I traded it in. I bought a new one for $8, but I couldn't ever get the actuator to stop in the right place to line up the new pin. The dealership also quoted a hilarious $90 to install it. I ended up just wrapping a bit of wire around the flap to keep it open at all times and that worked just fine for me.

My M235 has the M Performance Exhaust and I hear the flap rattling a little on startup, but once the flap is open I don't hear it at all. At this point, I think I'd prefer that there was no flap to begin with.
I’ve been doing research on all bmw models with the flap rattle on the forums.
Most do say when they mod the faps to stay open the rattling stops.
I came upon an easy way to keep the fap permanently open by removing fuse 146. I have the 230i exhaust. For the M235i/M240i fuse 146 & 147 in the trunk.
I removed the fuse while the valve was open and so far one day later no rattle.

I’ll update in a few more days.

I did hear it’s difficult to install the pin spring clip.
Quote:
Originally Posted by Climate Changer View Post
Quote:
Originally Posted by Joe T. View Post
I had the pin break on my old 228 before I traded it in. I bought a new one for $8, but I couldn't ever get the actuator to stop in the right place to line up the new pin. The dealership also quoted a hilarious $90 to install it. I ended up just wrapping a bit of wire around the flap to keep it open at all times and that worked just fine for me.

My M235 has the M Performance Exhaust and I hear the flap rattling a little on startup, but once the flap is open I don't hear it at all. At this point, I think I'd prefer that there was no flap to begin with.
I’ve been doing research on all bmw models with the flap rattle on the forums.
Most do say when they mod the faps to stay open the rattling stops.
I came upon an easy way to keep the fap permanently open by removing fuse 146. I have the 230i exhaust. For the M235i/M240i fuse 146 & 147 in the trunk.
I removed the fuse while the valve was open and so far one day later no rattle.

I’ll update in a few more days.

I did hear it’s difficult to install the pin spring clip.


it's been a few weeks since the mod and it works 95%. it rattles occasionally now for a few minutes only.
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      09-02-2019, 02:47 PM   #26
maverick83
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On my M135 I removed 4 bolts from the actuator, removed the spring and bent it open. Put it back in and all rattles gone.

Look at my post on Babybmw

dreadful exhaust flap rattle .
https://r.tapatalk.com/shareLink?sha...8;share_type=t

Removing the fuse logs an error code in the DME btw
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      10-22-2019, 08:19 AM   #27
werdna87
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Anyone have any experience getting this fixed out of warranty? 2015 M235i with a really bad exhaust rattle as of late, I can look in and see the flap hitting with the metallic click. Is this formally a recall yet? It seems like a fairly common issue
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      10-23-2019, 12:00 AM   #28
Luftwaffe1O1
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Originally Posted by werdna87 View Post
Anyone have any experience getting this fixed out of warranty? 2015 M235i with a really bad exhaust rattle as of late, I can look in and see the flap hitting with the metallic click. Is this formally a recall yet? It seems like a fairly common issue
You can just get it welded open. I had it done on my m2 exhaust because they fixed it twice on my stock exhaust
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      10-23-2019, 11:18 AM   #29
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Originally Posted by Luftwaffe1O1 View Post
You can just get it welded open. I had it done on my m2 exhaust because they fixed it twice on my stock exhaust
Weld? wow that seems a bit excessive. I tried pulling the fuses (146 and 147, both 5A) but no matter what the flap keeps on staying closed. Is there some way to "lock" the flap open so that I can pull the fuses and have it stay? I used a stick and moved it to open, pulled the fuses, and, and then as soon as I started the car the flap was closed again...
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      10-23-2019, 12:21 PM   #30
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Originally Posted by werdna87 View Post
Weld? wow that seems a bit excessive. I tried pulling the fuses (146 and 147, both 5A) but no matter what the flap keeps on staying closed. Is there some way to "lock" the flap open so that I can pull the fuses and have it stay? I used a stick and moved it to open, pulled the fuses, and, and then as soon as I started the car the flap was closed again...
Yes on BM3 you can do this... if it wont open with this switch, ur valve has been shorted somehow and youll have to replace it for 20-30$
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      10-23-2019, 01:34 PM   #31
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Quote:
Originally Posted by werdna87 View Post
Anyone have any experience getting this fixed out of warranty? 2015 M235i with a really bad exhaust rattle as of late, I can look in and see the flap hitting with the metallic click. Is this formally a recall yet? It seems like a fairly common issue

It's a simple fix. Just need to pop in a new clip. Your old one must have broken so the flap is just rattling around since it has no resistance. It's item #8 in the diagram below. It's about a $10 part at most places including the dealer. This clip is the same for the M-performance exhaust for those who are wondering.

https://www.realoem.com/bmw/enUS/sho...diagId=18_0978
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      10-23-2019, 03:19 PM   #32
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Quote:
Originally Posted by werdna87 View Post
Weld? wow that seems a bit excessive. I tried pulling the fuses (146 and 147, both 5A) but no matter what the flap keeps on staying closed. Is there some way to "lock" the flap open so that I can pull the fuses and have it stay? I used a stick and moved it to open, pulled the fuses, and, and then as soon as I started the car the flap was closed again...
I thought if you turn it off while in sport + mode it will stay open.
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