I. Don't really see any major smoke out the tailpipes but I've only driven the car at night. I did see streaks in the oil I drained after 75 miles post rebuild and also have white paste in the oil cap.please tell me it may just be the intake manni gasket. I'm going to pressure test the cooling system and do a leakdown test tomorrow. The car has run very good with plenty of power but just driving 20 miles to work im down about a quart of antifreeze.I would just like to pinpoint it the best I can before tearing it down.