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Old 11-21-2010, 10:23 AM   #9
jmatta
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Join Date: Nov 2007
Location: Chicago suburbs
Posts: 1,675
From what I understand reading Jake's comments, it's not the leaking which causes problems, but the fact that the plastic impeller breaks and gets lodged in the cylinder head; this causes a hot spot and eventually a cracked head.

I plan on replacing my original pump, which will be nine years old with 19k miles, as a precaution with whatever pump Jake recommends.
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