There is a lot of talk about cast impellers vs stamped impellers. Since original pumps Volvo installed at the factory were from a supplier who used cast impellers, I think folks believe that is ipso facto a better design than any pump with a stamped impeller. I'm skeptical. Especially, noting, Volvo began supplying their pumps with stamped impellers in the blue box you would obtain from the dealer parts department. Funny how prejudices form in our minds.
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Art Benstein near Baltimore

Don't be irreplaceable. If you can't be replaced, you can't be promoted.