So a buddy of mine bought a 90 f250 and we torn it all the way down and put it back together with new gaskets and oil cooler etc. The problem we r having is it runs great but some how water keeps getting into the oil and we have no idea how its getting in there. We have it taken apart half way now to check the water ports on the intake and that doesn't seem to be the problem. Like I said everything is new except for the piston rings they were brand new when we opened the block the first time. Any advice would help thanks guys.