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      02-15-2019, 04:59 PM   #14
IllSic_Design
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Drives: 09 E92 335i
Join Date: Jun 2016
Location: Northern California

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Well you might as well just drain the coolant from the hose you need to replace the o-ring on. Otherwise you are going to drain way more coolant than necessary and have to buy more than needed. If you want to know where the drain is though it is on the bottom drivers side of the radiator.
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