Heater core replacement

Tiny
DOCDRYWALL
  • MEMBER
  • 1997 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
How to replace a heater core?
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have the same problem?
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No
Saturday, November 20th, 2010 AT 3:13 PM

30 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
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
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Sunday, November 21st, 2010 AT 12:59 PM
Tiny
WHITECHICK30
  • MEMBER
  • 1997 FORD EXPEDITION
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?
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
DOCFIXIT
  • EXPERT
Air traped in system or blend door malfunction
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
EMORSE
  • MEMBER
  • 1997 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
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.
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
PROTECH1980
  • EXPERT
Changed it because it was leaking or because it keeps plugging up?
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
EMORSE
  • MEMBER
Its leacking almost like there is a build up of preasure. Tried flushing it both times too
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
EMORSE
  • MEMBER
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?
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
EMORSE
  • MEMBER
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
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
DOUGLAS74
  • MEMBER
  • 1998 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
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
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
SATURNTECH9
  • EXPERT
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.
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Friday, November 9th, 2018 AT 5:33 PM (Merged)
Tiny
VIXNART
  • MEMBER
  • 1998 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 90,000 MILES
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.
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_1926.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname2_618.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname3_242.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname4_121.jpg

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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
KNOBBE49
  • MEMBER
  • 1999 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 144,000 MILES
Estimated cost for replaceing heater core
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
B_LOCO83
  • MEMBER
  • 1998 FORD EXPEDITION
Heater problem
1998 Ford Expedition V8 Two Wheel Drive Automatic

how to change the front heater core?
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
RASMATAZ
  • MEMBER
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


http://www.2carpros.com/forum/automotive_pictures/12900_htc1_1.gif



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


http://www.2carpros.com/forum/automotive_pictures/12900_htc_1.gif



5. Remove the A/C plenum demister adapter.

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


http://www.2carpros.com/forum/automotive_pictures/12900_hc2_2.gif



6. Disconnect the vacuum line.


http://www.2carpros.com/forum/automotive_pictures/12900_hc3_3.gif



7. Remove the heater core bracket.

1 Remove the two screws.
2 Remove the bracket.


http://www.2carpros.com/forum/automotive_pictures/12900_htc4_1.gif



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.


http://www.2carpros.com/forum/automotive_pictures/12900_htc5_1.gif



10. Remove the heater core.

INSTALLATION


http://www.2carpros.com/forum/automotive_pictures/12900_htc6_1.gif




http://www.2carpros.com/forum/automotive_pictures/12900_htc7_1.gif




http://www.2carpros.com/forum/automotive_pictures/12900_htc8_1.gif



1. Follow the removal procedure in reverse order.
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
SKYSCANNER
  • MEMBER
  • 1998 FORD EXPEDITION
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.
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
DONPEP
  • MEMBER
  • 1999 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 96,679 MILES
How much does it cost to replace the heater core on a 99 expedition, at a mechanic shop?
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
RASMATAZ
  • MEMBER


http://www.2carpros.com/forum/automotive_pictures/12900_h1_24.jpg



http://www.2carpros.com/forum/automotive_pictures/12900_h2_23.jpg



Note:Part and labor varies within location.
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
REGINALD NOWLIN
  • MEMBER
  • 1998 FORD EXPEDITION
  • V8
  • 4WD
  • AUTOMATIC
  • 17,300 MILES
Ford 1998 Expedition heater core is bad. How do I know which one to replace?
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Friday, November 9th, 2018 AT 5:34 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
What do you mean by "which one"?
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Friday, November 9th, 2018 AT 5:34 PM (Merged)

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