Re: Heater Core Blues

Posted by HH56 On 2012/10/17 19:41:01

Look carefully at the square plenum above the fresh air vent opening on the inside. You should see some tabs or maybe they are screws. Anyway, that square box will separate from it's base and come off. You will see the bolts going into the heater box mount. Those have to come out and I believe there might be one or two into the firewall on the engine side as well.

The heater box comes apart essentially the same as the later ones except the core is mounted differently. IIRC, it's flat instead of angled. There are some install instructions and half baked photos in the accessories section of SM. You can reverse the operations which might help the removal process.