I run a CSI electric pump. but only about 20 to 40 miles a week. I think most people that run them have high horsepower requirements, and dont want to loose the roughly 15 horsepower it takes to turn a belted unit. Plus the down side of a belted unit is at high RPM they cavitate the water at the inpeller and do not flow at a proper rate. The electric units flow at the best rate at all times, no fluxuation. But to answer your question Ive not yet had a problem, car stays very cool.