Alittle FYI, i called the Porsche Department Service tech and asked how many liters of coolant does a My97 Boxster hold and they said 2 gallons... they didnt know in liters but 2 gallons = 7.57 liters which is just about how much that device removed from my cooling system.
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Thats great! I still cannot grasp how 50+psi of vaccum can "pull" fluid all the way from radiators without opening any breather valves or anything. It goggles my mind cause i do not understand the physics behind it.