The Air Oil Separator (AOS) operates to return oil that was mixed with air from the cam covers and return it to the crankcase. It has two inlet pipes, one from each cam cover and a bottom hose where the oil returns to the crankcase. This articles shows the photos taken to remove the AOS from a 2007 Base Cayman.
Remove the engine cover.
Jack up the car and remove the right rear wheel.
Remove the tie wrap on the wiring harness near the right hand hose connection.
Squeeze the upper... 18 Comments