Oil in Air Filter and under my car

[swarda]

I just had the vacuum pump on my 1982 300TD rebuilt because it was sucking oil. Recently I've noticed that after driving a long time, there is oil under my car in several different spots. I jacked up the car to look under it and saw that there was oil everywhere. I began looking through the forums for help and saw a few threads about if you have oil in your air filter/housing that it could be a faulty oil drain gasket. Sure enough I have oil and chunky stuff in my air filter and its housing. Can someone please suggest some things to check out before bringing it back to my mechanic?? Thanks!