hawgman said:
There have been many discussions as to how long that 3000 hour life span actually comes out to in miles. It ends up being basically the same as a mechanical pump.
You would have to drive something like 45mph a day for 3 hours a day for 3 years ( may not be exact, I don't remember, but it is close enough ).
Advantage to them is you toss a belt.... you could still technically drive your car because it won't overheat. Obviously you are not going to want to drive it far, and you would not have a charging system or power steering. But you could get a few miles down the road and possibly to an exit instead of being dead on the spot on the side of the road.
Just to add to hawg's post... 3,000 hours is a long time. Assume your average speed over the course of several years is 40mph (which is probably on the high side), then a 3,000 hour life span would be 120,000 miles. After 120K miles, I would be expecting to replace a mechanical pump too.
And in the meantime, I'll have the advantage of far superior water circulation, cooler engine temps, and the added bonus of a couple extra hp. And for drag racers, it's a godsend for cooling the car down between runs.