[SlipoftheKnife]

Here is a VERY crude drawing but you guys get the picture. Has anyone ever used a hand vacuum pump (usually used for bleeding brakes) to bleed their cooling loop? If you have all your lines hooked up and at the fill port line attach the vacuum and pull vac on the system it work right? The drain line would have a valve at the end that's closed and once vac is pulled on the loop have the valve attached or submerged in the coolant then open it, it should fill air free, correct?