Good luck detaching the lower hose. It's not exactly easily assessable. You'll see what I mean after you remove the splash shield and intercooler. I would drain the radiator by the drain plug then run the pump like you were bleeding the system to get more fluid out (with a trickle charger connected). Trying to do any more will turn this into a major job.
Let me know if you need info about removing the IC or running the pump.
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2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus.
2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
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