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Here is a tip on how to completely flush / refill your cooling system using a simple shop vacuum. To drain your system, first open both large and small tubes underneath the car, next to transmission and then connect a shop vacuum to the tubes to completely empty the system. To flush your system, should you want to do it, connect your shop vacuum to each tube and use your hand to inspect where the suction is. Then pour 1 liter of clean battery water or such from a bottle into a tube where suction exists. Just make sure you do not suck any dirt or your gloves in the system. To refill a comple