Quote:
Originally Posted by Harry Kamaltow
There are AOS in the oil sump maybe one of them has gone bad somehow?
HK
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This is highly unlikely & in any event will not have a impact on the OP's problem. The 2 AOS in the oil sump defoam oil returned to the sump from the heads by the scavenge pumps. The VOS (as Porsche labeled it) is mounted on the exterior right rear corner of the engine. The VOS depends on a internal diaphram to function properly & this diaphram eventually fails, YMMV.