They had a sleeve kit for a d24? Thats suprising. I'm guessing where the seal rides has a ridge or some pits from rust? Normally a little wear grove isn't going to make it leak if the seal is fresh, but pits will. How is the area of the crank just behind the seal? I have trimmed the backside of the outer flange of a seal before to get the seal to set in a little farther so it rides on a fresh area. I suppose if you have the kit though not much need to do that. I don't see why you would have to remove the oil pump though.
Jason
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