040304: I see this was several years back. I am needing to access the heater core tubes in a 2002 Xterra. Can you enlighten me on how you got the blower motor housing and the cooling unit out to get to the heater core? I have taken all screws that I could find off of the cooling unit and blower housing; even 2-3 nearer to firewall and up in a cavity. I know the AC Freon lines and the evaporator drain are still attached, but it seems the cooling unit and the blower motor housing are still attached to each other, or something. Did you actually remove the dash? techman_hou