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Old 05-12-2013, 01:49 PM   #28
Paul
Porsche "Purist"
 
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Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
Garage
When a AOS fails it can introduce high vacuum levels to the crankcase and since the oil tube dumps into the crankcase, the high vacuum levels can make it collapse and ultimately leak.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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