A friend of mine just got his first car. It's a 94 4.6l LX. The only major issue (minus paint and whatnot) is that his water pump leaks. I haven't seen it leak yet, but he says it leaks from the hole on top of the pump. Is this a simple/common problem, or would it be best to replace the whole pump? Also, I have a '96 parts car with a 4.6 in it, if needed, would that bolt right in?