YOUR RESEARCHHow does the Air Oil Separator AOS actually work?
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In searching around I see tons of threads on replacing it but I don't see a thorough explanation, diagram or video on how the AOS actually works. I have seen mentions of affects on mixture, coolant loop, crankcase pressure,etc all of which peak my interest... Seems like an awful lot more than just a PCV device. Can someone humor me here?
In the simplest terms it recycles the crankcase fumes through the intake system rather than venting to the atmosphere thereby lowering emissions and reducing pollution. All modern cars have a similar system in theory. The air/oil separator is just that - the crankcase fumes are oil laden and it separates the air and oil mix by swirling the mix around in the AOS, like a swirl pot, returning the oil to the crankcase sump. The heat from the coolant in the AOS mainly helps the system work more effectively particularly in colder climates.
https://rennlist.com/forums/996-forum/990363-air-oil-separator-aos-question.html Start from post 25.
Quotes source post: 14200310
Thanks that helps.
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