Originally Posted by crazyhatch
the lowest place on the block to drain the block is above the the deck just fill it up and run it for a few then drain it again or leave the hoses off and run it with a water hose in the upper hose and the lower running out on the ground
Definately just run a hose. Take out the thermo and just let it run a while. That's how it's done. Or, if you got $$, take it to a place that can do a pressure flush on the entire system, radiator included. Should only be around $40.