Exhaust flappy valve thingy

Robbo7 · Post by **Robbo7** » Tue Jul 05, 2016 9:47 pm

I've recently bought a 2012 e89 20i , the valve in the exhaust seems to be open all the time is this correct ? What is its purpose ??

beezernorton · Post by **beezernorton** » Wed Jul 06, 2016 3:07 pm

It's there to quieten down the car at certain revs. It's open all the time because either it's broken or someone has modded it to stay open to get a little more exhaust noise. No issue either way.

Filtermike · Post by **Filtermike** » Wed Jul 06, 2016 4:16 pm

There is a rubber tube usually attached to the valve on the back box - if this has been taken off the valve will remain open

Robbo7 · Post by **Robbo7** » Wed Jul 06, 2016 8:49 pm

Mine does still have the pipe there but it's open on start up and idle , is this correct I can shut it with my finger but it springs open again

dr_john · Post by **dr_john** » Sat Jul 09, 2016 2:30 am

What valve?

sammyz · Post by **sammyz** » Sat Jul 09, 2016 9:14 am

I clamped the vacuum pipe with a cable tie. It does seem to give you more growl at lower revs. Easy to do and easy to reverse.

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