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454 mpi overheating

Old 07-28-2011, 09:57 PM
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Default 454 mpi overheating

I replaced impeller,runs 160 at idle,that is where it would stay running wide open before the impeller took a dump. Now runing wide open temp gets up to 180 maybe even hotter but never let it get hotter. Other engine runs 160 . Looking for advice on what might be wrong thanks
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Old 07-28-2011, 10:11 PM
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Housing could be scored if you did not replace it.

Did you account for all the old impeller pieces?

Back flush the system if you have not.
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Old 07-28-2011, 10:28 PM
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I thought I got all the pieces. What is the best way to backflush the system. thanks for your help
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