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      06-15-2019, 03:34 PM   #3
EJT86
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Drives: 2011 M3 DCT
Join Date: Mar 2014
Location: Boston, MA

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I would siphon it out. Fill with washer fluid, then purge The pump and lines then fluid then top it off. Reason being you’d have to search and waste time to find out if the coolant will harm the washer pump if you pump the full tank.