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Old 07-15-2016, 12:01 PM   #6
seningen
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Join Date: Jul 2008
Location: austin
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Remove the water pump and see if you can flush the system backwards to see if any broken impeller parts have collected in a point that might be able to be dislodged and removed.

Not an expert -- but I have heard of blade parts breaking off and blocking passages in the heads which lead to hot spots and ultimately cracked heads.

Mike
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