@mlukas161, here's a photo of the OFHG mating surface on the block after the oil filter housing was removed. In the left (before) photo you can see how much of a mess it was creating on the side of the engine. After I cleaned it up a bit, you can see things more clearly on the right. I was adding 1/2 liter of oil every 2k miles, so this was a significant leak.
BMWs currently in the garage: VF570 E46 M3, E46 XI Touring, E83 X3 "M" retrofit
Last edited by chagrin; 12-09-2012 at 10:07 PM.