Question on Boxster Air Oil Separator

Hi, today coming from work my 01 Boxster non S started smoking real bad I stopped the car right away and towed it home cause I knew the AOS went bad. But when I got home and started it up I heard a bad noise in the engine. Is there something else wrong with the engine? Should I go ahead and replace the AOS and pray and start it up? Pleas help me out I just retired from the NAVY and dont need this right now

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: Boxster Air / Oil Separator Replacement - 986 / 987

[Wayne 962]

Okay, don't panic. When the air-oil separator fails, it pulls a huge vacuum on the engine, when then can cause odd noises to happen. Most common is a whistling noise as air is drawn into the engine past slightly leaky seals. Odd behavior. Here's what you can do to test - remove the small hose that connects the AOS and the throttle body and plug both ends. Then run the engine and see if the noise is still there. If yes, then you probably have other problems. If no, then it's probably the AOS. Only run the engine for a short time in this configuration, as the piston rings work best and expect the engine crankcase vacuum to be at a significant level when running.

- Wayne