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Old 11-14-2012, 01:21 PM
pcy pcy is offline
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Location: Boston
Join Date: Sep 2011
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Mein Auto: '06 530i, '07 C280, ML320
Good [electric] water pump shouldn't make any noises except the noise of water flowing thru it. If the surroundings are quiet, you will hear the humming noise from the electric water pump when it's operating. If you are sure the screech is coming from the water pump, I'd recommend you to replace it.

Last edited by pcy; 11-14-2012 at 01:23 PM.
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