water in oil. how do I get rid of the mayo? Mar 7, 2017 19:15:34 GMT via Tapatalk Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by oasis6x on Mar 7, 2017 19:15:34 GMT Good old rover k series. Usually when I've done a headgasket on a rover the oil gets in the coolant.. now it's reverse. Heads off however the sump is obviously full of mayo mix, oil and water. I can drain it obviously but I'm going to waste a gallon of oil and new filter by refilling it when it's not clean. Is this just how it has to be?Clean as much as possible, get rid of as much mayo as possible, new filter, new oil, run it up and then do the process again in a week or so?Thanks.