you may want to check the type of oil that you are running, I recently rebuilt my turbo but still experienced some somking. The combination of two things were the culprit, first was clogged vacume lines from the breather box, and second was the oil itself. I was running 5w oil for the colder weather, but that is generally too thin for cars with the turbo, it is drawn through the turbo and into the intake lines, Ive since switched back to 10w and my problems have gone away.

Good luck with your brick,

mike 87 745T