heater core

You have to remove the heater hoses off of the core. Then the bolts around the blower ring. Then go inside the car and inside the left hand vent door is a rod with a hook on it. Usually they unscrew off the bottom of the housing. Don't forget to remove the very fragile vent hoses then pull it out. I'm sure I've left out something but that should get you thru the bulk of it.