How do you remove and replace the heater core on a 98 Ford Expedition 2wd 5.4 V8?
The heater core is difficult to change on the Ford trucks. They have it buried in the plenum box and you have to remove the steering wheel, steering column, dash, evacuate the refrigerant system, drain the radiator, and remove the plenum box to get to the core. Replacing the core is easy, getting to it is a day's work. The Expedition is particularly difficult to get to. It is almost above the transmission tunnel and well buried behind the dash. The Expedition uses the same plenum box as the F150, so any information on that system applies to the Expedition/Navigator.
You need to be sure that the heater core is really the problem before tackling this job. If you have a pool of coolant on the floor, you'll have to go after the core. If the problem is lack of heat, there are some things you need to eliminate before tearing into the truck. You need to make sure that coolant is flowing through the core. Check the temperature of the heater hoses going into the firewall when the engine is cool and see if they warm up together as the engine warms up. If both hoses get hot at about the same rate, this is a good indication that coolant is flowing through the core. You can also remove the hoses and flush the core with a water hose splice from Home Depot and a water hose. Water should flow unobstructed through the core.
If it appears that coolant is flowing and you don't have obvious leaks, the next step is to check the blend door. This door controls the air flow through the heater core and failure is common on Ford trucks. When the door breaks, it can block the flow of air through the core and kill heat and will also have an impact on AC. If the system seems to work intermittently, it's a good indication that the door is broken and rattling around randomly blocking or opening the passage to the core.
For diagnostic information on how to check the operation of the blend door and a cheap easy fix, check the heatertreater listing on Ebay or the web site at heatertreater.net. The dealer fix for the blend door is basically the same procedure for replacing the heater core, so it will be expensive. The HeaterTreater alternative will solve the problem at a fraction of the cost and work and is well within the capability of the average shade tree mechanic.
i want the video or instruction,how replace the heater core on the ford expedition --------------------------------------------------------------------------------------------- Here is a link to a step by step tutorial with pictures: http://www.queegebo.com/cars-a-other-vehicles-articles-top-166/31-1997-ford-f-150-46.html
you must remove the dashboard, instrument cluster, passenger airbag, etc. remove the heater and ac evaporator cover, http://www.f150online.com/forums/showthread.php?t=215665 this will help well first I'll make the point that the question is for the REAR heater core and not the front on which the person failed to see. To fix the issue, I have not had any issues with mine(98 Expedition). Either buy the owner's manual/repair guide and that should help.
To replace the heater blower cable on a 1988 Ford F-150, first remove the driver's seat. Then, remove console side panels, glove box, and radio. Pull of AC control knob and detach console from the?æfront frame at its corners. Next, remove console side braces, right vent distribution, steering column cover and left vent distribution. Finally, remove the 10 clips holding the heater blower cable and replace.?æ?æ?æ
Drain the cooling system. Disconnect the heater hoses at the core tubes in the engine compartment. Remove the instrument panel lower trim panel Remove the heater core cover from the left side of the heater case (4 screws). Remove the core retaining retainers and if necessary bracket from the case. Lift out the heater core and seal.