Well, I investigated my leak and it wasn't oil after all but coolant. I believe it's coming out of the water pump. Obviously it needs replaced, is there anything else in there I ought to do whille I have it off and out of the way? I haven't had a very good water pump year. I have two farm trucks '89 and '90 with a 7.3L diesels in them. I replaced the pump on one that started leaking out of the hole in the bottom and not 1 day later the other one started. Also had to change one on a grain truck about 2 weeks before that and about a month later this. Looks much easier to get at on the mustang though. Just wanted to make sure there isn't anything else I need to so while I got it out. Got 150 k on it and I fairly new to working on 5.0's.