Can an engine force oil through a good AOS?

[JFP in PA]

Originally Posted by Gelbster

Thanks for this explanation. I did not know this about the X51. I had only read the 'sexy' parts of the X51 kit - sports exhaust ,extra mystery power and cost. I have never seen a comprehensive list of all the X51 differences. The extra scavenge pumps and N.W. passage certainly seem desirable and rather inexpensive to have made a standard feature.I understand why it would be expensive as a Dealer installed retrofit/option.
But for the P.O.'s question it does hint at an (unlikely?) cause

The X51 "kit" is a $15K item just for the parts, and includes new cylinder heads, making it a very expensive add on as it requires dropping the engine and a PIWIS.

As mentioned above, I would look at the existing scavenging pumps before getting exotic.

[911monty]

This is the thread I was referring to where the OP talks about smoke on the left handers that got me wondering about the scavenge pumps, especially on bank 1. I know installing incorrectly is easily done and was going to suggest checking since it is easily determined if installed correctly or not. Apparently incorrect installation was the problem and could be an issue with this one as well. The thread attached shows how to identify. Hope this helps.

Huge Smoke Screen From My Boxster At a Track Day

[patssle]

Is there an easy solution to checking the health of the scavenging pumps?

Car also seems to be making more startup noise than usual. Not that oil consumption might be related or anything.

[Gelbster]

If you could describe or record the start up noises it may help diagnosis. Noting the oil grade used in your engine may lure the undesirables into the thread, so keep it quiet ?

[911monty]

Originally Posted by patssle

Is there an easy solution to checking the health of the scavenging pumps?

Car also seems to be making more startup noise than usual. Not that oil consumption might be related or anything.

If this were mine the first thing I'd is get under the car and make sure the pumps are clocked correctly. There is no pressure test etc. that can be done. They are easy to remove and inspect though.