Good luck. I had the same problem. You just have to flush it a million times. Try dissolving some laundry detergent in the water, run it for a while and flush it. Also, you may neeed to remove the upper and lower coolant hoses, and thermostat housing, then spray into the engine block, and top radiator inlet. You will be surprised how much oil will come out. I have done this a few times, and I still have drops of stray oil in the coolant galleries.