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In order to change the heater core on most vehicles you have to remove the Air Handling Unit (evaporator case) from under the dash. In most cases you have to remove the entire dash in order to get the case out. (the case is the big black thing under the instrument panel, mostly on the passenger side.) Im order to get the case out you have to remove the nuts from the bolts that go through the fire wall. Next you have to pump down the AC system and unhook the evap. core at the TXV (near firewall). The next step is to remove the heater core lines at the firewall. (ALL 3 of these are done in the engine caompartment.) Now is where you would remove the instrument panel, and the AC system duct work. After all that you should be able to get the Air Handling Unit out. once the caseis out you have to take out the screws that hold the center seam together, and whatever else may be in the way (actuator linkages, wireharnesses, etc, etc.) Once you have "split" the case you should simply be able to pull the heater core out and put in the new. Reverse the process to put back together. Hope this helps.

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โˆ™ 2007-03-19 20:56:53
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Q: How do you replace a heater core in a 97 ford cargo van?
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