Props to Luther and to anyone who can complete this process in 2 hours with a nice clean and through finish. I just completed mines and it took me several hours. Got mines pretty clean......all the way down to the valve seats. Had to change out my OFH gasket at the same time though. I completed the last two ports much quicker once I found out how to maneuver the gun. Still.....2 hours is very quick. BTW, this was performed on a 07 335i with 56k miles.
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