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TLK · 09-09-2019, 03:10 PM

A lot of bmw engines have some kind of crankcase pressure valve that opens a short time after shutting down, so sometimes you hear that "last exhale" if the environment is quiet.

09-09-2019, 03:10 PM	#10
TLK First Lieutenant 112 Rep 385 Posts Drives: '14 M5 CP, '12 550i, '04 545i Join Date: Sep 2016 Location: SF Bay, CA iTrader: (0)	A lot of bmw engines have some kind of crankcase pressure valve that opens a short time after shutting down, so sometimes you hear that "last exhale" if the environment is quiet.
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