Well I picked up my car yesterday after having a used engine put into it and well, that engine has a very loud tapping to it and blows some white smoke when you let off the gas. On the upside though, there is no check engine light and the the transmission is adjusted right and will now shift correctly. I took the car to a mechanic who is very familiar with 7m's and he said it was not valves but something deeper in the engine. His guess was wrist pins. It's very disappointing but I shouldn't be surprised with it being a used engine. I will take it back Monday and have them drop another one in it, on them of course. I requested that specific engine because it had a new head on it. I was naive I guess. The other two engines they have look unmolested and original. Better luck next time I hope.:nono: