New CCV and NOW it decides to make noise???

Originally Posted by 95 E34

As a pollution control system, many cars for a very long time have had recirc systems of valve cover air to separate oil vapors from it, to lessen the impact of those vapors entering the engine and being burnt and sent out the exhaust system.
Burnt oil is horribly bad for the environment.

When this recirc/separation system fails, it fails to remove the oil and oil vapors from crankcase atmosphere and subsequently from being burnt.

Or worse a plugged up system will blow a rear main seal , famous for old Volvos circa 80's to late 90's

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