Just out of necessity, I used a vacuum cleaner, gallon jug, and a 1/2 inch tube about 2 feet in length for a extraction of the about 2 cups of coolant under the coolant plate on a Toyota 3.3l V6, The jug contracted some but allowed for enough vacuum to clean out the coolant, taking a couple of times, and the vacuum cleaner didn't get any coolant in it. The tube went to the bottom of the jug and the vacuum attachment fit in beside it, then I slightly modified it by duck taping the tube at the top. Just to clarify, it was an older vacuum cleaner that had a deficiency that wouldn't matter if it was ruined in the process. I later used this set-up to vacuum sludge chunks from under the valve cover, worked great for this process too. Vacuum cleaner has suffered no ill effects and will be operational for next task.