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      08-29-2012, 07:01 PM   #20
Private First Class

Drives: 2011 335D M-Sport
Join Date: Mar 2012
Location: Canada

iTrader: (0)

Originally Posted by chenry View Post
What is this for - and why is it positioned so close to the exhaust/turbo (I think) / and is there any benefit in keeping it open all the time (it seems to be vacuum actuated - I may be wrong)
Ok, so a guy I work with whom use to design components for BMW through a third party German company has a different answer about the purpose for this snorkel.

What he says is that at WOT and heavy use of the accelerator, the vacuum will allow the intake to open and pull hot air from around the turbo to help draw in cooler air to keep that area under the hood from getting too hot and to provide some general cooling.
2011 335D