Thread: 6HP26 Mercon SP
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      10-18-2019, 09:32 AM   #3
Dr Diesel
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Drives: 2009 335d
Join Date: Jan 2014
Location: Ft Lauderdale

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Yeah I did a total fluid exchange by drilling out my old pan at the pump feed tube and running a 3/4 outside diameter vinyl tube into the pump feed. Drilled a few holes through the pan to drain and filled that Home Depot bucket with 12 quarts of fluid and ran it through. So the pump was getting only fresh fluid while never seeing any mixed old / new fluid. Fluid started to change to new after about ~7 quarts based on height of fluid in the bucket. Setup worked great. It also worked for filling the new pan and topping off after warming, a lot easier then sliding under with a transfer pump.