Cooling problems

I just installed one of those this weekend and noticed the impeller was welded to the shaft. Your problem might explain why they do that now.
Could be they fixed the problem with the weld.
I jammed it up their *** sideways as it caused me alot of grief so they were definitely aware of the problem.
I have had other quality related issues with sevaral of their products, I no longer use their stuff if I can avoid it.