87 to 95 Wrangler
If you have a/c remove the screws that hold the a/ac unit up and move it to the floor. Then remove the glove box to get a better view of under the dash. disconnect the 2 cables 1 for the temp door the other for the defrost/heat door. disconnect the defrost air duct hose. Now for the engine compartment side. Remove the battery and tray. disconnect the wire and the little hose under the blower motor. disconnect the heater hoses. there are 3 to 4 - size 7/16 nuts 1 under the battery tray another to the right of that, another to the right of that one. the last nut is on the firewall on the drivers side by the back of the valve cover. now you're ready to push the unit back into the passenger compartment. be sure to put rags to absorb the anti-freeze that will pour out of the old heater core. Now that you have the unit on the floor. Theres a vent/cover to the right that has a cable attached. remove the 5-8 screws and the cover should come off and moved to the side without detaching the cable. Now just maneuver the black heater case out and exchange the heater core. be sure to set the 2 moving doors in their place when you put the cover back for the heater core...
Ok!
Big JIm
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