Heater core replacement

Hello,

You will need to start by disconnecting the battery and vacuuming down the AC system here is a guide to help you get started with the job.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

and

https://www.2carpros.com/articles/replace-heater-core

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers

Heater problem
1997 Ford Expedition V8 Automatic

I just replaced my heater core and thermosat but i am not getting any hot air what will cause that?

Air traped in system or blend door malfunction

i have a 97 ford expedition that i have replaced the heater core in the front 2 times about 6 months apart im stumped as to what could be causeing it. any help would be great.

Changed it because it was leaking or because it keeps plugging up?

its leacking almost like there is a build up of preasure. tried flushing it both times too

i havent put the new one in yet but i will check that it said something about a nutralizer what would you ecomend to use if that is what i need?

ok i tested the electrolysis level and i got a reading of .200 VDC
im going to clean the grounds anyway for safety but could there be anything else that would cause it

My husband and I are trying to replace the heater core on my 1998 ford expedition. In the manual it has a picture of the whole dash taken apart. Could you please tell me if we have to take the whole dash apart or if there is another way to take the heater core out and put in the new one. I hope so becaus e it seems really hard if we have to go through all of that

REMOVAL


Disconnect the battery ground cable.
Drain the radiator. Refer to: "Engine, Cooling and Exhaust : Cooling System : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
Remove the instrument panel. Refer to: "Body and Frame : Interior Trim : Dash Board : Service and Repair" See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair








Compress the holding tabs and disconnect the heater water hoses at the heater core.








Remove the A/C plenum demister adapter.
1 Remove the screw.
2 Remove the A/C plenum demister adapter.









Disconnect the vacuum line.








Remove the heater core bracket.
1 Remove the two screws.
2 Remove the bracket.









Remove the plenum chamber top.
1 Remove the 13 screws.
2 Remove the plenum chamber top.

Remove the blend door assembly from the case.








Remove the heater core.

Looks like you do they charge over 7hr's labor to do it so it's a big job.

I have removed all of the visible bolts, screws and clips from the dash as well as the gauges and most of the dash board pieces however the main molded part of the dash seems to have hidden anchors of some sort on both sides. I can't figure out how to remove them to access the heater core box.

estimated cost for replaceing heater core

Heater problem
1998 Ford Expedition V8 Two Wheel Drive Automatic

how to change the front heater core?

REMOVAL 1. Disconnect the battery ground cable. 2. Drain the radiator. Refer to: "Engine, Cooling and Exhaust : Cooling System : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair 3. Remove the instrument panel. Refer to: "Body and Frame : Interior Trim : Dash Board : Service and Repair" See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair

4. Compress the holding tabs and disconnect the heater water hoses at the heater core.

5. Remove the A/C plenum demister adapter. 1 Remove the screw. 2 Remove the A/C plenum demister adapter.

6. Disconnect the vacuum line.

7. Remove the heater core bracket. 1 Remove the two screws. 2 Remove the bracket.

8. Remove the plenum chamber top. 1 Remove the 13 screws. 2 Remove the plenum chamber top. 9. Remove the blend door assembly from the case.

10. Remove the heater core. INSTALLATION

1. Follow the removal procedure in reverse order.

Heater problem
1998 Ford Expedition V8 All Wheel Drive Automatic

I have been helping my pastor in replacement of his heater core for this Car . I did read the other info that was found and still having problems removing the dash to get to the core . The question is do you or anyone have a better photo of the dash and the location of screws and bolt's that need's to be removed . I have never ran into such a problem in my life and this is from a man that did repairs on tanks and just about anything with wheels in the army . Now a disabled vet .

How much does it cost to replace the heater core on a 99 expedition, at a mechanic shop ????

Note:Part and labor varies within location.

Ford 1998 Expedition heater core is bad. How do I know which one to replace?

What do you mean by "which one"?

from my understanding there is a rear and front heater core, i would like to no how can i tell which core is the bad one

How did you determine you even had a bad one. If you physically saw fluid hitting the ground, then that is the one leaking.

There is a drian hole in the rear that was leaking and than at one time there was smoke from the dash.

That is indication of both leaking. You need to have it pressure tested to find out which.

Heater problem
1998 Ford Expedition V8 Four Wheel Drive Automatic 1ooooo miles

i need to replace heater core

THis is a very involved process. The dash needs removed, air bag, sensors... I strongly recommend getting a good repair manual with pictures to identify parts and step by step instructions. THey offer an online repair manual on this site which is less expensive.

For me to try to explain everything would take several pages and allow too much room for error.

How do you replace a heater core? Also, about how much is the labor price and a diagram of how to put one in.

new heater core OEM dealer part $102 7 hours labor @ shop hourly cost (around $70 p/h) HEATER CORE Removal & Installation (Front A/C-Heater System) Disconnect negative battery cable. Drain radiator. Remove instrument panel. See INSTRUMENT PANEL . On 5.4L engines, remove junction block splash shield. Disconnect cable ends from starter relay. Remove junction block bracket. On all engines, compress heater core hose holding tabs. Disconnect heater hoses at heater core. Remove A/C plenum demister adapter screw. Remove A/C plenum demister adapter. Disconnect vacuum line. Remove 2 heater core bracket screws. Remove heater core bracket. Remove 13 screws from plenum assembly top. Remove plenum assembly top. Remove blend door assembly from case. Remove heater core. To install, reverse removal procedure. Tighten bolts to specification. See TORQUE SPECIFICATIONS . INSTRUMENT PANEL Removal & Installation Tips Click a link to view tip Mike-WAcenter console removal Disable air bag system. See AIR BAG SYSTEM SAFETY article in GENERAL SERVICING. Move power seats rearward (if equipped). Move adjustable pedal to full rearward position (if equipped). Release mounting tabs and position power distribution box aside. Remove 3 bolts and remove bulkhead electrical connectors in engine compartment. From inside vehicle, remove bulkhead electrical connector insulator and unclip bulkhead electrical connectors from dash panel. Remove front floor console (if equipped). Remove steering column cover. Remove valance panel. Disconnect blend door electrical connector. Disconnect climate control panel vacuum harness. Remove left and right sill plates. Remove left and right kick panels. Remove right side assist handle. Remove left and right windshield garnish moldings. Disconnect brakelight switch electrical connector. Disconnect adjustable pedal motor electrical connector (if equipped). Remove radio and generic electronic module ground bolts. Disconnect left side main wiring harness and bulkhead connectors. Remove steering column opening cover reinforcement. Disconnect air bag sliding contact and anti-theft electrical connectors. Disconnect remaining electrical connectors from steering column. Disconnect transmission range indicator from steering column (if equipped). Remove steering column support nuts. Lower steering column. Remove instrument panel attaching bolts through steering column opening. Remove instrument panel reinforcement bolt (below left corner of cigarette lighter). Disconnect fuel inertia fuel shut-off switch connector. Remove right side ground bolt. Disconnect air suspension switch electrical connector (if equipped). Disconnect right side main wiring harness connectors. Disconnect blower motor electrical connectors. Release locking tab and disconnect restraint control module electrical connector. Remove right fender splash shield away from dash panel. Disconnect antenna lead from antenna base and feed cable through cowl side panel (loosen grommet). Remove instrument panel relay cover. Remove glove box. Wearing safety glasses, disconnect passenger's side air bag module connector. Remove passenger's side air bag module screws. Remove passenger's side air bag module. Remove instrument panel reinforcement bolt below and to left of glove box. Remove instrument panel bolts behind passenger's side air bag module opening. Remove instrument panel bolt on relay bracket. Loosen instrument floor brace bolts and nuts. Remove left and right instrument panel cowl nuts. Remove instrument panel cowl top bolts. With an assistant, remove instrument panel. See Fig. 10 . To install, reverse removal procedure. Fig. 10: Removing Instrument Panel

I would like to know where th Heater core is located,and is there a way to bypass it while I can replace it ;low on cash

Follow the hose coming off the fitting where the thermostat is. This will be where one of the bigger coolant hoses comes from the radiator. The smaller hose will go to the heater block and it will be joined by the return line as well. I would unhook the connections to the block and plug the lines with a plug of some sort. That should get you by until the core problem can be resolved.