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Boxstard · 07-13-2021, 05:38 PM

I suspect a bad AOS out of the box… that’s the one thing you changed and run into massive smoke.

You should have read threads here about how aftermarket ones are bad…. reason why I spent extra on the OEM one while I often try to shop smart without paying Porsche tax. Buy one from FCP Euro and you can get a lifetime warranty if it ever fails again, which it will.

Failed AOS sucks (pun intended) oil out of the crankcase and flood air intake, not sure if that could have put oil in the air box but I guess it is possible. And cannot think of any other ways…

Quick and dirty check for functioning AOS, try removing the oil filler cap while engine is running, if you cannot twist it open then excessive vacuum meaning failed AOS. You should be able to remove it fairly easily with functioning AOS. This may not be easy to try, when it smokes right up…

Also if oil got in exhaust/ cat it may take a while to burn it all up. Not with my Boxster but I blew turbo before and it was my experience, took several miles to clear it up on my first drive after repair.

Hope new AOS does it and get the car back on the road where it belongs, good luck!

07-13-2021, 05:38 PM	#12
Boxstard Registered User Join Date: Apr 2016 Location: SE Michigan Posts: 496	I suspect a bad AOS out of the box… that’s the one thing you changed and run into massive smoke. You should have read threads here about how aftermarket ones are bad…. reason why I spent extra on the OEM one while I often try to shop smart without paying Porsche tax. Buy one from FCP Euro and you can get a lifetime warranty if it ever fails again, which it will. Failed AOS sucks (pun intended) oil out of the crankcase and flood air intake, not sure if that could have put oil in the air box but I guess it is possible. And cannot think of any other ways… Quick and dirty check for functioning AOS, try removing the oil filler cap while engine is running, if you cannot twist it open then excessive vacuum meaning failed AOS. You should be able to remove it fairly easily with functioning AOS. This may not be easy to try, when it smokes right up… Also if oil got in exhaust/ cat it may take a while to burn it all up. Not with my Boxster but I blew turbo before and it was my experience, took several miles to clear it up on my first drive after repair. Hope new AOS does it and get the car back on the road where it belongs, good luck! __________________ 1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Ben’s short shifter, PSE, 996 TB, UDP, stereo/ center console delete, hardtop and speedster humps, daily driver rain or shine or snow! Last edited by Boxstard; 07-13-2021 at 05:41 PM.