True. My initial comment about "goop it or it'll leak" was intended more as a Murphy's law thing. However service manual does not spec it in the procedure. I do feel RTV is cheap and easy insurance against not seeing that one little imperfection that seeps...doing a water pump twice in one day is MUCH less fun than doing it once...
FWIW, I just ran across this very nice video which I hadn't seen before, clearly explaining the divider plate to water pump vane clearance thing...even better than the Wallace page IMO: http://www.youtube.com/watch?v=UdyAo5546JQ I'm intrigued that they chose to weld a little round donut of sheet metal on the impeller...that's a new one on me, and seems a little unnecessary if the clearance is already tight...
