plums of white smoke 924 turbo
 

Hello all

I have a 924 1981 turbo when i start the car no smoke .drive the car no smoke. Park it for 5 min go to shop get in start it and not always but lets say every third or forth start up it blows plumes of white smoke for 10 to 20 seconds and then stops smoking. I open the hood to see if i can see somthing and nothing. I remove one of the pipes leading to the oil seperator and then the same smoke comes out the exhoust. I am completly comfused on this one .I can somtimes drive the car for a day no problem and then the next day same thing its a little inbarising. When i say plumes of smoke i mean you cant see the car .its like a cloud of smoke .Please help .