To do the core just disconnect the hose that is the return to the engine at the engine. Get a garden hose end that will fit into the heater hose and turn the water hose on and reverse flush the heater core back through the engine and out the lower radiator hose.
To do the core just disconnect the hose that is the return to the engine at the engine. Get a garden hose end that will fit into the heater hose and turn the water hose on and reverse flush the heater core back through the engine and out the lower radiator hose.