Originally Posted by villageidiot
i would (while changing heater hose) unhook the old hose from the engine, and hook one end of the new hose to the engine, hook a garden hose (if not frozen solid) to an open end of the hose, and turn it on flush it thru until clean water comes out the open end of hose.
Don't put too much pressure on the system with the garden hose. I caused a heater core to fail on a '79 Eldorado by flushing it with full house pressure. You think an S-10 heater core was a pain....