Looks like AOS, but engine WOES

[Jake Raby]

AOS MOF#1= Clouds of white smoke, CEL, the engine runs like crap.

AOS MOF#2= No smoke, no CEL. High pitched squeal at idle, collapsed oil fill tube, FMS and RMS pulled into their bores due to high crankcase vacuum, oil pressure indicator may illuminate if oil is at temperature, at idle.

Its all according to what part of the diaphragm fails.... Thats what dictates the symptoms.

and a Dealership may not be the best place to go, some of them have never seen a MOF2 from an AOS and they may tell you that you need a new engine.

I received a perfectly good core this way.. I threw a used AOS on the engine and it still runs today without issues... I bought the engine as a "blown Core" for 300 bucks.