Hey everyone... when my 1989 325is has been sitting for a while (more than a day) it smokes considerably when I start it up, if I have been driving it recently to starting it up, it does not do this at all. I was wondering if this could be the valve guide seals, or if it is just old and the rings are wearing out. The engine has 254K on it. I would like to get rid of this problem, lol... thanks for any help! 
