BMW M3 and BMW M4 Forum - View Single Post - S55 PCV 'SQUEAL' - Easy Fix (so you don't have to replace the entire valve cover)

behindthen0thing · 09-20-2021, 07:53 AM

you guys have any idea how much vaccuum at idle is normal when you pull the oil cap? I'm wondering if my PCV system might be pulling allot of vaccum at idle and pressurizing the crankcase during boost.

09-20-2021, 07:53 AM	#37
behindthen0thing Captain 840 Rep 937 Posts Drives: M4 Join Date: Jul 2018 Location: Germany iTrader: (0)	you guys have any idea how much vaccuum at idle is normal when you pull the oil cap? I'm wondering if my PCV system might be pulling allot of vaccum at idle and pressurizing the crankcase during boost.
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