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Old 11-30-2012, 08:03 AM
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ahull ahull is offline
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,201
Mein Auto: ist schnell! (03 330i SC)
The woosh sound is your CCV letting off vacuum pressure. It's normal - mine's done it for as long as I can remember. If it starts to sound like a fog horn, chewbacca, dying duck, then it's clogged and needs replacing. Most people replace around 80-100k as preventive maint as they tend to clog and the hoses get brittle and leak.
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