the spyder posted:

This one was packed bad enough that we went ahead and used the hose. When we finally got clean water from both the radiator, block, and heater core (read: 20+ gallons of water ran through), we let it drain and blew the system out with compressed air. Every hose was pretty much disconnected. I filled it with distilled water and new coolant, knowing that in a few weeks/heat cycles I'm going to be flushing it again with just distilled water and more new coolant. After letting the car warm up, the coolant went from green to murky green. I personally don't like those radiator flush kits, but I'm tempted try it. There's just so much rust/corrosion in the system.