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Old Sep 14, 2025 | 03:45 PM
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sl63 amg
oil control
I have a 2014 sl63 with the 5.5 biturbo and was wondering if anyone knows if the air \ oil seperator pulls crankcase pressure off or is crankcase pressure passively blown off with the working pcv system on our cars?
thanks in advance!!
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Old Sep 14, 2025 | 07:51 PM
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It's an active system. The air/oil separator is part of the PCV system and uses engine vacuum to actively pull crankcase vapors into the intake to be burned. It's not just passive.
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Old Sep 14, 2025 | 11:38 PM
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sl63 amg
so how does the oil get back to the crankcase, isnt it positive pressure, I know the vapor is pulled into the intake but how does the liquid oil collected get back to the crankcase, thanks again alexie
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