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One point. I've repeatedly had it drilled into my head, by smarter people than I, is to avoid water pumps with metal impellers like the plague. When that pump fails (when, not if), the wobbling metal impeller will be chewing up part of your block. That will result in an increased gap between the impeller and block, leading to poor water flow. And it can't be fixed short of a new block. I'd much rather sacrifice an impeller than an engine block.
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