When I reinstalled the engine in my 2000 996 after fixing the intermix problem I also installed a new AOS. No problems until recently. I had to replace the starter motor a week ago (always something). AFter replacing the starter when starting the car there is a tremendous amount of smoke which goes away in a short time. I am thinking that I knocked something loose on the AOS. I removed the throttle body and there is a thick film of oil inside the plenum. Seems to be coming from the breather tube that I believe comes from the AOS and attaches to the plenum. Any ideas on what might have come loose?