hey i appreciate the info guys, I talked with the tech over at the bmw store. He said that he has never seen a burnt valve, not to say that its not possible. I understand your thinking on the bent valve, just cant see the previous owner missing a gear. He also told me that the hepa filter was more than likely clogged. never thought of that, honda also uses hepas. All of this is sorta premature i havent even tried diagnosing atyhing myself yet. Just thought i would get peoples opinions on a possible valve issue before pulling the head. im first going to be sure i check good for any possible vaccum leaks, by spraying brake clean around the intake area. Only thing is im assuming that the previous owners tech checked all of that before condemning a valve. Thanks again, ill let you know what i find.