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			I agree with thstone.  It doesn't sound like a typical rod knock.  I wouldn't run it very long without the water pump.
		 
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 '58 356A coupe, just a driver
 '00 Boxster S fair weather - daily driver
 '11 Jeep Grand Cherokee Limited - winter daily driver
 '92 F250 - junk hauler; previous Porsches '95 993;'08 Cayman S;'70 911E
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