Thread: buzzing noise
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      01-27-2013, 01:53 PM   #3
BMWM.D.
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Drives: E90 335i & C6 Grand Sport
Join Date: May 2009
Location: Santa Barbara

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For what it's worth, it's normal to hear the electric water pump run sometimes after you turn off the engine. It's circulating coolant to cool the turbos to prevent coking. Sounds like yours might be louder than normal, though.
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