Repair 7

How to Install a Heater Core in a 99 Ford Expedition

The Ford Expedition is a full-sized SUV produced by Ford as a replacement for the Bronco. The 99 Ford Expedition is a part of the vehicles first design generation. The heater core is located behind the dash board on the passengers side. While the heater core is being replaced it is a good idea to check the temperature blend door as well. Replacing the heater core is an involved project that requires most of a day.

Instructions

1

Park the Expedition on a level surface and set the parking brake. Open the hood and disconnect the negative battery cable. Prop the hood open with the hood support.

2

Disconnect the bulkhead connectors at the back of the engine compartment and push them into the vehicle.

3

Pull down on the steering column panel and remove it. Remove the five bolts under the steering column panel with a socket wrench. There are two on both sides and one in the middle at the bottom.

4

Remove the bolts along the top of the dash, just under the windshield. Remove the bolts under the carpet, along the back of the passengers foot well.

5

Open the glove box and pull out enough that the clips pop free and the glove box stays open. Remove the two bolts holding the passenger airbag. Pull off the oval cover above the glove box and remove the bolt underneath. Remove the passenger airbag.

6

From outside, disconnect the evaporator case sample tub and the blower motor. These can be reached from the engine compartment, just in front of the passenger side door.

7

Reach inside the passenger fender well and disconnect the antenna lead. Push it through the firewall.

8

Remove the bolt in the rear corner of the passenger foot well. Grab the dash board on both sides and pull forward. This will usually require two people. Pull the dash board forward far enough to allow access to the heater core.

9

Remove the 14 bolts around the plentum case. Open the case and remove the two bolts that secure the heater core in place. Disconnect the tubes attached to the heater core with the quick disconnects. Remove the heater core from the vehicle.

10

Put the new heater core in the SUV and tighten the mounting bolts. Attach the hoses and push them on until the clamps snap closed. Close the plentum case and tighten all of the bolts.

11

Reassemble the dash board in the reverse order it was disassembled. Reconnect the negative battery cable. Close the hood.