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Stohlen · 11-23-2012, 08:44 PM

Thats just the pressure build up before the BOV is overcome and vents the pressure. Your system is functioning normally.

11-23-2012, 08:44 PM	#2
Stohlen Lieutenant Drives: AW 135i Join Date: Aug 2012 Location: Waterford, Mi Posts: 532 iTrader: (1) Garage List 2008 BMW 135i [5.00]	Thats just the pressure build up before the BOV is overcome and vents the pressure. Your system is functioning normally.