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      04-30-2012, 02:42 PM   #7
idnan
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Drives: Alpine White 335i
Join Date: Nov 2010
Location: Birmingham

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Theres a pipe with a one way valve in which you could change as well and it is under 30 so it's not too expensive. I damaged mine when I fitted my OCC so I ordered a new one not long ago.

It looks like this:



Part number 11157553949

Not 100% sure how the PCV valve can cause a puff on startup but I'm guessing a faulty valve could allow oil to drip back into the engine overnight.