[Dick So. Cal.]

I have leakless waterpumps on both my cars. Because I think the rear seal is a knife-edged neoprene seal, it will over time wear out because of lack of lubricant. (I have seen shafts with grooves in them, too). So what I do and it seems to work is to put a drop of oil from the dipstick on the shaft where it enters the rear part of the pump. I do the same to front whether it needs it or not. I figure it can't hurt and all it can do is help. So far, so good.

Dick