M235i is quieter suddenly

hbrown · 06-01-2022, 10:09 AM

Hi there, I'm new here. I've noticed recently that the exhaust of my 2016 m235i has gotten noticeably quieter. I am tuned on Bootmod3 with a catless downpipe and another thing that's weird is that most of the exhaust noise is coming out of the right tip even though I have the valve on the left side permanently open. I would really appreciate y'alls help. Thanks!

aerobod · 06-01-2022, 10:16 AM

Sounds like a broken "bow" on the valve, allowing the flap to close, even though it is set to open. Common problem.

hbrown · 06-01-2022, 11:26 AM

Quote:

Originally Posted by aerobod

Sounds like a broken "bow" on the valve, allowing the flap to close, even though it is set to open. Common problem.

I just checked with a flashlight and the valve is open so I don't think that's it.

06-01-2022, 10:09 AM	#1
hbrown Registered 0 Rep 2 Posts Drives: BMW M235i Join Date: Feb 2022 Location: Houston iTrader: (0)	M235i is quieter suddenly Hi there, I'm new here. I've noticed recently that the exhaust of my 2016 m235i has gotten noticeably quieter. I am tuned on Bootmod3 with a catless downpipe and another thing that's weird is that most of the exhaust noise is coming out of the right tip even though I have the valve on the left side permanently open. I would really appreciate y'alls help. Thanks!
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06-01-2022, 10:16 AM	#2
aerobod Car Geek 3626 Rep 3,592 Posts Drives: Caterham R500, M2-G87, Macan S Join Date: Mar 2008 Location: Calgary iTrader: (0)	Sounds like a broken "bow" on the valve, allowing the flap to close, even though it is set to open. Common problem.
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