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Elsewhere it was mentioned that overfilling the engine with oil(particularly at oil change time) contributes to premature failure of the diaphragm.
Interesting to note that some others explain that the deficiency that causes AOS diaphragm failure is insufficient capacity of the 'tank'. Since space is so limited where the stock AOS is located, this implies a solution requires some relocation of the oil/oil mist condensation/oil recovery tank.
Some have achieved this by cutting off the connections of a failed AOS and then connecting to a much larger tank located in the trunk. I guess it would be important to position it so it could be checked easily and frequently? A lister suggested using a tank from Jegs.
But whatever you selected it would need a diaphragm that mimicked the Porsche one.
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