How do you replace the heater core on a 1993 Mazda MPV van?

Its a bear to do, you have to remove the center console also the panel for the glove box. The in-out hoses must be detached from the heater core. You dissaemble unit that houses the core and blower fan. Be prepared with plenty of rags and muscle ointment, rags for driping coolen, ointment for a sore back from reaching back to the firewall and crawling on the floor to remove the core. It would be a good idea to get a manual with pictures and diagrams to help do this.