Heater core diagram

Tiny
CCC822009
  • MEMBER
  • 1996 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 166,600 MILES
I need a diagram of where my heater core would be located in my ford truck. I have a problem with my heater core spewing mist onto my windows after the pressure and the temprature drops from the vehicle. I want to just bypass the heater core all together so that I can run it without my heater core.
I dont need a heater until winter time anyways and I live in Texas so there isn't much of a winter here.


Please help
Do you
have the same problem?
Yes
No
Thursday, March 5th, 2009 AT 1:51 PM

25 Replies

Tiny
RACEFAN966
  • EXPERT
Passenger side behind/under the dash
If you need more get back to me.


http://www.2carpros.com/forum/automotive_pictures/249564_Graphic_49.jpg



Here is a guide on heater hose replacement.It isn't vehicle specific, but they are all pretty much the same when it comes to this. You can just use a hose connector where they attach to the heater core to by-pass it. Also one on heater core replacement if you want to check it out

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

https://www.2carpros.com/articles/replace-heater-core
Was this
answer
helpful?
Yes
No
+2
Friday, March 6th, 2009 AT 11:11 AM
Tiny
BUNKY
  • MEMBER
  • 1996 FORD F-150
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 115,000 MILES
How to change the heater core.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BLACKOP555
  • EXPERT
Your best bet is have someone show you or help you.

You have to remove the whole dash just to get at it. Goodluck.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
IMCHUCKROCK
  • MEMBER
  • 1996 FORD F-150FORD F-150
I have a 1998 ford f150 with a 4.6 with approx 130,000 miles on it. I heard you have to discharge the a/c on it to replace the heater core. I have replaced heater cores before on other cars & trucks and never had to do this. I this correct? Also I am not positive it is the heater core but I smell antifreeze inside the truck so that leads me to belive that is what it is.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
JWALTH02
  • MEMBER
Yeah if your heater core is inside the cab, 1. No you do not have to discharge the ac since the heater core is in the coolant system, I do recommend draining the coolant and disconnecting the lines from the engine compartment and getting as much coolant out as possible from there before removing it, and 2. That's probably exactly the reason you're smelling antifreeze is the heater core.
Was this
answer
helpful?
Yes
No
+2
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
6154FORD
  • MEMBER
I have the same problem on my 97 with same engine, according to Haynes auto repair manual disconnecting the AC evaporater lines is part of the procedure. I came to this forum to ask the same question. More precisely I would Like to know WHAT is the WORK AROUND to avoid disconnecting AC. If its just more work I'll do it. I have changed about 6 heater cores. But this will be the first that requires a complete dash removal. For peace of mind, I would like to know why Haynes suggests it.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
6154FORD
  • MEMBER
There is obviously no reference to the A/C lines in those illustrations. Thanks for the quick response and the illustrations.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
MR. MCFAST
  • MEMBER
  • 1999 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 79,250 MILES
How do I remove heater core?
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Not a fun job. Here are the directions I found for you:

1. Disconnect the battery.
2. Drain and recycle the engine coolant.
3. Remove the instrument panel. Refer to.
4. Compress the holding tabs and disconnect the heater water hoses at the heater core.
5. Remove the A/C plenum demister screw and remove the A/C plenum demister adapter.
6. Disconnect the vacuum line.
7. Remove the heater core bracket.
8. Remove the 13 retaining screws and remove the plenum chamber top.
9. Remove the blend door assembly from the case.
10. Remove the heater core. To install:
11. The installation is the reverse of the removal.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
MARYHORNBACK
  • MEMBER
  • 1992 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
How do I replace the heater core on my vehicle?
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BLACKOP555
  • EXPERT
You will have to drop the glovebox, and see if theres a box with a few bolts on it right behind it. If so remove the cover and the sealant, you should see the heater core, next go under the hood and disconnect and catch the antifreeze coming out, from there you can pull the heater core out, try not to tip it and spill the antifreeze in the vehicle.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
DENNIS MULLINS
  • MEMBER
  • 1997 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
What is involved in replacing the heater core in my 1997 f-150 4x4 with a 4.6, ive been told that the dash comes out, the right fender comes off, is this true, can you give me the proper way for the repair, thank's alot
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
DAVE H
  • EXPERT
HEATER CORE

Disconnect negative battery cable. Drain cooling system. Remove instrument panel. See INSTRUMENT PANEL . Disconnect heater hoses at heater core. See Fig. 1 . Remove A/C plenum demister adapter. Disconnect vacuum line. Remove heater core bracket. Remove 13 plenum assembly top screws and remove plenum top. Remove temperature blend door assembly. Remove heater core from plenum. To install, reverse removal procedure. Fill and bleed cooling system. See COOLING SYSTEM FILL & BLEED .
INSTRUMENT PANEL
Removal & Installation
Disconnect negative battery cable. Disconnect positive battery cable and wait at least one minute for air bag backup power supply to deplete. Move automatic transmission shift lever to "1" position (if equipped). Carefully pry to release 4 clips and remove steering column opening cover. Remove fuse door. Position hood latch and parking brake release handles aside.
Remove instrument panel floor duct panel. Remove lower instrument panel steering column cover. Remove left and right side door scuff plates. Remove left and right side cowl side trim panels. Disconnect brake on/off switch connector. Disconnect radio and Generic Electronic Module (GEM)/Central Timer Module (CTM) ground connections.
Disconnect 3 instrument panel main harness connectors. Remove firewall wiring harness from inside left side of engine compartment. Pull bulkhead electrical connector handle and disconnect harness. Disconnect both air bag diagnostic monitor connectors located behind right side of instrument panel. Disconnect inertia fuel shutoff switch connector located behind right side of instrument panel.
Disconnect right side ground connections. Disconnect electronic blend door motor connector and climate control panel vacuum line connector. Remove instrument panel steering column opening cover support. Remove 4 steering column support nuts and lower steering column. Disconnect radio antenna cable and remove radio.
CAUTION:Carry air bag with trim cover facing away from body to reduce injury from an accidental deployment. Place air bag on bench or other surface with trim cover facing upward.

Remove instrument panel relay cover. Open glove box and release both door stops. Remove passenger side air bag module. Remove right side assist handle and windshield molding. Remove instrument panel bolt under left side of glove box. Remove 2 instrument panel bolts behind passenger side air bag module opening. Remove 2 upper instrument panel bolts and bolt on relay bracket. Remove lower instrument panel bolt on left side of cigarette lighter.
Remove 2 lower instrument panel nuts located on either corner of instrument panel. Remove instrument panel bolt under center of steering column. Remove 2 instrument panel bolts on bottom left and right sides of instrument cluster opening. Disconnect air bag sliding contact connectors and anti-theft sensor connector. Disconnect steering column connectors. Remove instrument panel from right side floor brace. Remove instrument panel. To install, align and position instrument panel with clips in sheet metal. To continue installation, reverse removal procedures. Tighten steering column mounting nuts to 10-13 ft. lbs. (13.5-17.6 N.m).


http://www.2carpros.com/forum/automotive_pictures/266999_1_9.jpg

Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
CARMEN2361
  • MEMBER
  • 1998 FORD F-150
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 210,000 MILES
My heater core needs to be replaced. I bought the part, but I dont no how to get to it. Some say I need to remove the whole dash, some say just remove the glove box. Im a little scared of the air bag being there. My truck is a 1998 f-150. Can you please help. Cant afford to take it to a mechanic. Thanks I will be glad to donate 20.00 if this helps me.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Let me know if you need further assistance with this repair...


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_1004.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname2_280.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname3_104.jpg

Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
HEATER CORE
Removal & Installation
Disconnect negative battery cable. Drain cooling system.
Remove instrument panel.
See INSTRUMENT PANEL REMOVAL BELOW.
Disconnect heater hoses at heater core. Remove A/C plenum demister adapter. Disconnect vacuum line. Remove heater core bracket. Remove 13 plenum assembly top screws and remove plenum top. Remove temperature blend door assembly. Remove heater core from plenum. To install, reverse removal procedure.

INSTRUMENT PANEL
Disable air bag system. See AIR BAG RESTRAINT SYSTEM article. Move automatic transmission shift lever to "1" position (if equipped). Carefully pry to release 4 clips and remove steering column opening cover. Remove fuse door. Position hood latch and parking brake release handles aside.
Remove instrument panel floor duct panel. Remove lower instrument panel steering column cover. Remove left and right side door scuff plates. Remove left and right side cowl side trim panels. Disconnect brake on/off switch connector. Disconnect radio and Generic Electronic Module (GEM)/Central Timer Module (CTM) ground connections.
Disconnect 3 instrument panel main harness connectors. Remove firewall wiring harness from inside left side of engine compartment. Pull bulkhead electrical connector handle and disconnect harness. Disconnect both air bag diagnostic monitor connectors located behind right side of instrument panel. Disconnect inertia fuel shutoff switch connector located behind right side of instrument panel.
Disconnect right side ground connections. Disconnect electronic blend door motor connector and heater control panel vacuum line connector. Remove instrument panel steering column opening cover support. Disconnect all electrical connectors from steering column. Remove 4 steering column support nuts and lower steering column.
Disconnect radio antenna cable and remove radio. Remove instrument panel relay cover. Open glove box and release both door stops. Remove passenger side air bag module. Remove right side assist handle and windshield molding. Remove instrument panel bolt under left side of glove box.
Remove 2 instrument panel bolts behind passenger side air bag module opening. Remove 2 upper instrument panel bolts and bolt on relay bracket. Remove lower instrument panel bolt on left side of cigarette lighter.
Remove 2 lower instrument panel nuts located on either corner of instrument panel. Remove instrument panel bolt under center of steering column. Remove 2 instrument panel bolts on bottom left and right sides of instrument cluster opening.
Disconnect air bag sliding contact connectors and anti-theft sensor connector. Disconnect steering column connectors. Remove instrument panel from right side floor brace. Remove instrument panel.
To install, reverse removal procedure. Align and position instrument panel with clips in sheet metal. Tighten steering column mounting nuts to 10-13 ft. Lbs. (13.5-17.6 N.M).
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
DA_FORD_MAN
  • MEMBER
  • 1997 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 102,487 MILES
I have put 3 standard aluminium heater cores in my truck in 2 years. Every time I start to smell anti-freeze from the vents, then see smoke coming from them, and finally it starts leaking anti-freeze out on the ground. I am lookin for a copper heater core b/c the ford dealership said that would fix the problem. Could anyone explain what is causing the heater core to start leaking?
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BLACKOP555
  • EXPERT
Could be bad grounding. Check to make sure all the grounding straps are tight and properly attatched on the vehicle.

If that isnt it it could be incompatable coolant in the system.

Try using a system flush then replacing it.

If nothing you might want to try a flow restrictor or add more ground straps
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
ONEMOJO
  • MEMBER
  • 1991 FORD F-150
Heater problem
1991 Ford F150 V8 Two Wheel Drive Automatic

After the cover is off the heat unit how do I remove the old and install the new heater core.
Was this
answer
helpful?
Yes
No
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_1249.jpg

Was this
answer
helpful?
Yes
No
-1
Thursday, November 22nd, 2018 AT 8:12 AM (Merged)

Please login or register to post a reply.

Recommended Guides