Thread: What is this noise!?
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      04-14-2017, 12:20 AM   #2
TKR
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Drives: 2016 X5 40e & 2018 330e
Join Date: Aug 2015
Location: South Florida

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There is a separate auxiliary water pump running few minutes after engine shut down, to cool turbos (they have their own coolant circuit). Maybe the pump is shot?
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