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Old 11-14-2012, 06:21 AM
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supertech777 supertech777 is offline
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Location: springfield , missouri
Join Date: May 2008
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Mein Auto: 1995 525i
Originally Posted by 95 E34 View Post
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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