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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20 and N26 Turbo Engine / Drivetrain / Exhaust Modifications > exhaust flap open/ close sound
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      12-04-2012, 11:10 PM   #1
kppanic
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exhaust flap open/ close sound

hello,
are you supposed to be hearing the exhaust flap open and close when the engine is well warmed up?

Just today when I was parking in P4 condo parking lot, I had my Windows rolled all the way down and noticed the flap close whenever I let go of the gas and open whenever I put foot on the gas. couldn't have been doing more than 5kmph. it's this normal? it's like a clicking "ptchh" sound.


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      12-05-2012, 07:02 PM   #2
SomeRandomer123
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Yep, completely normal and it is surprisingly pronounced isn't it!
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      12-07-2012, 08:08 PM   #3
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Quote:
Originally Posted by SomeRandomer123
Yep, completely normal and it is surprisingly pronounced isn't it!
thanks for the answer!
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