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Removing AOS from the intake tract trip CEL?


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Something popped in my mind when I started to notice some smoke every morning, I'm hoping its merely due to the engine design but...

If it is the AOS, can this simply be re-routed and put in a catch can? I figure I can plug the part of the intake manifold as this was what I used to do when I was modifying imports. I know many cars pull this off without tripping the CEL, but those cars were all non e-gas, so has anyone here tried this before? TIA

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I think you misunderstand the purpose of the AOS.

Per Porsche's 1999 Tech Book:

"Since there is no drop between the cylinder heads and oil

sump in a Boxer engine, the oil is drawn out of each of the cylinder heads by an oil return pump.

Oil Separator

The oil drawn off via the return pumps is fed into "swirl pots". In these containers, the oil is centrifuged and defoamed, i.e. gases which the oil has picked up on the way to the lubricating points are removed. This ensures that the oil always has a good consistency which is necessary to guarantee the reliability of the hydraulic valve clearance compensation. Gases could bring about changes in the engine timing which would have an effect on the performance and exhaust-emission behavior of the engine."

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