Installed heater core i forgot how the two metal braces mount?

Removal & Installation

1. Disconnect the battery negative cable.
2. Remove the instrument panel from the vehicle.
3. If equipped with air conditioning, recover the refrigerant.
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
5. Disconnect the accumulator inlet tube.
6. Drain the cooling system.
7. Disconnect the heater hoses from the heater core tubes.
8. Remove the four nuts from the heater-A/C mounting studs on the engine compartment side of the dash panel.
9. Remove the nut(s) that secure(s) the heater-A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
10. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
11. Remove the housing from the vehicle.
12. Lift the heater core out of the housing

Installation is the reverse of removal.



Repair Guides Heater Core Removal Installation AutoZone com

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Removal & Installation

The heater core is removable from under the right side of the instrument panel.

1. Disconnect the negative battery cable.
   
2. Position a drain pan under the radiator, open the drain **** and drain the cooling system to a level below the heater core.
   

Plug the heater core tubes to avoid spilling coolant in the passenger compartment during removal.

1. Disconnect the heater-to-engine coolant hoses from the core tubes on the firewall, in the engine compartment.
   

Exploded view of a common heater core and case assembly

If necessary, loosen and remove the under dash cabin light retaining bolt

With the bolt removed, the light and housing may be repositioned out of the way

On some early model vehicles, the cabin light mounted under the dash may interfere with cover removal. If necessary, loosen the retaining bolt and reposition the light housing with the wiring attached.

1. From the passenger compartment (under the dash) remove the heater core rear case cover-to-cowl screws, then remove the cover from the vehicle.
   

Be sure that all are removed before attempting to remove the cover. If necessary, unbolt and reposition all/part of the dashboard for better access.

1. Remove the straps or brackets from each end of the heater core.
   
2. Carefully remove the heater core from the cowl and case.
   

To install:

1. Insert the heater core into the case, taking care not to damage the tubes as they are inserted through the cowl.
   
2. Install the straps or brackets to the ends of the heater core and secure using the retaining screws.
   
3. Install the heater core rear case cover and secure using the retaining screws.
   
4. If moved for access, reposition and secure the dash mounted cabin light and housing.
   
5. Connect the heater-to-engine coolant hoses to the core tubes.
   
6. Connect the negative battery cable, then properly refill the engine cooling system.
   
7. Run the engine at normal operating temperatures and check for leaks.
   

There is a bunch of pictures to post so please keep refreshing your page. This is gonna take a few minutes...

Hi there,

Remove heater/evaporator case. Remove vacuum source line from heater core tube seal. Remove seal from heater core tubes.
Remove heater core access cover screws. Remove access cover and seal from heater/evaporator case. Lift heater core and case seals out of heater/evaporator case.
Installation
If installing new heater core, transfer case seals to new core. Install heater core and seals into heater/evaporator case. Install heater core access cover on case. Install seal on heater core tubes. To complete installation, reverse removal procedure. Evacuate and charge A/C system. Refill cooling system.

HEATER/EVAPORATOR CASE
Removal

• Disconnect negative battery cable. Drain coolant from radiator. Gently pull instrument panel away from right side of dash panel.
• Discharge A/C system using approved refrigerant recovery/recycling equipment. Disconnect heater hoses from heater core. Plug heater core tubes or drain coolant by blowing coolant from heater core using low pressure compressed air. Disconnect vacuum supply hose from inside engine compartment.
• Disconnect A/C lines from evaporator core. Plug A/C lines and evaporator core tubes. Remove instrument panel assembly brace to evaporator case bracket screw. Remove assembly brace.
• Remove floor register and rear floor duct from bottom of heater/evaporator case. Remove nuts securing heater/evaporator case to firewall. Remove 2 screws securing support brackets to cowl top panel. Carefully pull heater/evaporator case away from firewall. Remove heater/evaporator case.
• To install, reverse removal procedure. Evacuate and charge A/C system. Refill cooling system.

INSTRUMENT PANEL
Removal & Installation

• Position front wheels in straight-ahead position. Disable air bag system. See AIR BAG RESTRAINT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT section. Disconnect negative battery cable. Remove steering column trim shrouds.
• Disconnect all electrical connections from steering column switches. Remove cover from under steering column. Remove 4 bolts and reinforcement from under steering column. Disconnect parking brake release control motor from parking brake and ignition switch connector.
• Disengage insulator retainer. Remove insulator. Remove 4 nuts and reinforcement below steering column. Remove 4 nuts securing steering column to instrument panel and lower column to front seat. Disconnect PRNDL cable (A/T models).
• Ensure ignition switch is locked to prevent steering column from turning. Remove 4 instrument cluster retaining screws. Disconnect speed control cable and vehicle speed sensor (if equipped). Disconnect electrical connectors and remove instrument cluster. At steering column opening, remove one bolt securing instrument panel to brace. Remove one instrument panel brace bolt (below radio area).
• Remove sound insulator under glove box by removing 2 push nuts securing insulator to studs on climate control case. Remove glove box door and compartment. Remove air cleaner housing, battery and battery tray. Disconnect wires of main wire loom in engine compartment. Disengage rubber grommet from firewall. Feed wiring into passenger compartment through hole in firewall.
• Remove right and left kick panels. Disconnect wires from instrument panel at right and left kick panel sides. Remove screws on left and right sides of instrument panel.
• Pull up to unsnap right and left speaker opening covers. Remove speaker covers. Working through steering column and glove box openings, reach under instrument panel and disconnect electrical connectors, vacuum hoses, A/C-heater control panel cables, and radio antenna cable.
• Support instrument panel. Remove 3 screws attaching top of instrument panel to cowl top. Disconnect remaining wires. Remove instrument panel. To install instrument panel, reverse removal procedure.

Hope this helps...

Section 12-03: Air Conditioning System 1992 Town Car/Crown Victoria/Grand Marquis Workshop Manual REMOVAL AND INSTALLATION Plenum Removal

1. Disconnect battery ground cable.

1. Disconnect the heater hoses from the heater core tubes. Plug the ends of the heater hoses to prevent coolant loss.

1. Plug heater core tubes securely to prevent coolant leakage from heater core during plenum removal.

1. Remove three nuts located below the windshield wiper motor retaining the LH end of the plenum to the dash panel (Fig. 15).

FIG. 15 Plenum and Air Inlet Duct Removal

1. Remove one nut retaining the upper LH corner of the evaporator case to the dash panel.

1. Remove LH and RH lower instrument panel insulators.

1. Disconnect two vacuum supply hoses from vacuum source. Push grommet and vacuum supply hose into passenger compartment.

1. Remove all instrument panel retaining screws and pull the instrument panel back as far as possible without disconnecting any wire harnesses.

1. Loosen the RH door sill plate and remove the RH side cowl trim panel.

1. On manual systems, disengage the temperature control cable housing from the bracket on top of the plenum. Disconnect the cable from the temperature blend door crank arm. On ATC systems, remove cross body brace and disconnect wiring harness from temperature blend door actuator and disconnect the ATC sensor tube from the evaporator case connector.
   

1. Disconnect the vacuum jumper harness at the multiple vacuum connector near the floor air distribution duct.

1. Disconnect the white vacuum hose from the outside-recirculating door vacuum motor.

1. Remove two hush panels.

1. Remove one plastic push fastener retaining the floor air distribution duct to the LH end of the plenum. Remove LH screw and loosen RH screw on the rear face of the plenum (Fig. 14), and remove the floor air distribution duct.

1. Remove two nuts from the two studs along the lower flange of the plenum.

1. Carefully move plenum rearward to allow heater core tubes and the stud at the top of the plenum to clear holes in the dash panel. Remove plenum from vehicle by rotating the top of the plenum forward, down and out from under the instrument panel. Carefully pull lower edge of instrument panel rearward as necessary while rolling the plenum from behind the instrument panel.

Installation

1. Route the vacuum supply hose through the dash panel and seat the grommet in the opening.

1. Position the plenum under the instrument panel with the register duct opening up and the heater core tubes down. Rotate the plenum up behind the instrument panel and position the plenum to the dash panel. Insert the heater core tubes and mounting studs through their respective holes in the dash panel and the evaporator case.

1. Install three nuts on the studs along the lower flange and one on the upper flange of the plenum (Fig. 15).

1. Install three nuts below the windshield wiper motor to attach the LH end of the plenum to the dash panel.

1. Install one nut to retain the upper LH corner of the evaporator case to the dash panel.

1. Position floor air distribution duct on plenum. Install two screws and plastic push fastener.

1. If removed, position panel door vacuum motor to the mounting bracket. Install two retaining screws.

1. Connect the white vacuum hose to the outside-recirculating door vacuum motor.

1. Connect the vacuum jumper harness to the plenum harness at the multiple vacuum connector near the floor air distribution duct. Install floor duct.

1. Connect the ATC sensor tube to the evaporator case connector on ATC equipped vehicles.

1. Install the cross body brace and connect wiring harness to the blend door actuator on ATC equipped vehicles.

1. Connect the temperature control cable housing to the bracket on top of the plenum and connect the temperature control cable to the temperature blend door crank arm. Adjust the temperature cable as outlined under Adjustments.

1. Install the bolt to attach the lower RH end of the instrument panel to the side cowl.

1. Install the RH side cowl trim panel and tighten the RH door sill plate retaining screws.

1. Install glove compartment door and check arms.

1. Connect vacuum supply hose to vacuum supply.

1. Install RH and LH lower instrument panel insulators.

1. Install two hush panels.

1. Unplug the heater core tubes and connect the heater hoses to the heater core tubes.

1. Fill the cooling system with coolant to replace coolant lost during removal of the plenum.

1. Connect the battery ground cable. Check the system for proper operation.

This is to give you an idea where it's at (behind the dash) and what you would have to do to remove and replace it:

Removal & Installation

1. Disconnect the battery negative cable.
   
2. Remove the instrument panel from the vehicle.
   
3. If equipped with air conditioning, recover the refrigerant.
   
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
   
5. Ram: remove the accumulator.
   
6. Dakota, Durango: disconnect the accumulator inlet tube.
   
7. Drain the cooling system.
   
8. Disconnect the heater hoses from the heater core tubes.
   
9. Ram: remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
   
10. Remove the four nuts from the heater–A/C mounting studs on the engine compartment side of the dash panel.
    
11. Remove the nut(s) that secure(s) the heater–A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
    
12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
    
13. Remove the housing from the vehicle.
    
14. Lift the heater core out of the housing.
    
15. Installation is the reverse of removal.
    

1. Disconnect the battery negative cable.
2. Remove the instrument panel from the vehicle.
3. If equipped with air conditioning, recover the refrigerant.
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
5. Ram: remove the accumulator.
6. Dakota, Durango: disconnect the accumulator inlet tube.
7. Drain the cooling system.
8. Disconnect the heater hoses from the heater core tubes.
9. Ram: remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
10. Remove the four nuts from the heater-A/C mounting studs on the engine compartment side of the dash panel.
11. Remove the nut(s) that secure(s) the heater-A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
13. Remove the housing from the vehicle.
14. Lift the heater core out of the housing.
15. Installation is the reverse of removal.

Fig. Heater core removal/installation

PLEASE DON'T FORGET TO RATE!!!

Removal & Installation

1. Disconnect the battery negative cable.
   
2. Remove the instrument panel from the vehicle.
   
3. If equipped with air conditioning, recover the refrigerant.
   
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
   
5. Ram: remove the accumulator.
   
6. Dakota, Durango: disconnect the accumulator inlet tube.
   
7. Drain the cooling system.
   
8. Disconnect the heater hoses from the heater core tubes.
   
9. Ram: remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
   
10. Remove the four nuts from the heater–A/C mounting studs on the engine compartment side of the dash panel.
    
11. Remove the nut(s) that secure(s) the heater–A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
    
12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
    
13. Remove the housing from the vehicle.
    
14. Lift the heater core out of the housing.
    
15. Installation is the reverse of removal
    

Heater core removal/installation

1981-87 Models

1. Disconnect battery ground cable.
2. Discharge A/C system and disconnect refrigerant and heater lines from unit.
3. Move shift levers away from dash.
4. Remove right side cowl trim panel, if equipped.
5. Remove 4 screws at base and remove glove box.
6. Remove brace through glove box opening and remove ashtray.
7. Remove right half of lower reinforcement (7 screws to instrument panel and 1 to cowl side of trim panel).
8. Disconnect radio ground strap.
9. Remove right upper air duct by removing mounting screw and pulling duct out through glove box opening.
10. Remove instrument panel center brace and right instrument panel cluster pivot bolt.
11. Remove instrument panel cluster, disconnect shift indicator cable and lower steering column.
12. Remove steering column studs and radio.
13. Remove scoop connecting heater to center distribution duct (2 screws).
14. Remove center distribution duct by pulling bottom of dash out to gain clearance.
15. Remove floor air distribution duct.
16. Disconnect temperature control cable through glove box.
17. Remove 7 retaining nuts from firewall and screw that retains assembly to cowl side sheet metal.
18. Flex dash out and remove heater assembly.
19. Remove nuts from door arms and remove door arms.
20. Remove 7 screws to remove cover from housing.
21. Remove evaporator core.
22. Reverse procedure to install.

1. Disconnect the battery negative cable.
2. Remove the instrument panel from the vehicle.
3. If equipped with air conditioning, recover the refrigerant.
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
5. Loosen the accumulator.
6. Dakota, Durango: disconnect the accumulator inlet tube.
7. Drain the cooling system.
8. Disconnect the heater hoses from the heater core tubes.
9. Remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
10. Remove the four nuts from the heater-A/C mounting studs on the engine compartment side of the dash panel.
11. Remove the nut(s) that secure(s) the heater-A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
13. Remove the housing from the vehicle.
14. Lift the heater core out of the housing.
15. Installation is the reverse of removal.

REPLACING HEATER CORE

1. Disconnect the battery negative cable.
2. Remove the instrument panel from the vehicle.
3. If equipped with air conditioning, recover the refrigerant.
4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
5. Loosen the accumulator.
6. Dakota, Durango: disconnect the accumulator inlet tube.
7. Drain the cooling system.
8. Disconnect the heater hoses from the heater core tubes.
9. Remove the powertrain control module from the dash panel. Disconnecting wiring is not necessary.
10. Remove the four nuts from the heater-A/C mounting studs on the engine compartment side of the dash panel.
11. Remove the nut(s) that secure(s) the heater-A/C housing mounting brace to the stud(s) on the passenger compartment side of the dash board.
12. Pull the housing rearward far enough for the mounting studs and evaporator condensate drain tube to clear the dash panel holes.
13. Remove the housing from the vehicle.
14. Lift the heater core out of the housing.
15. Installation is the reverse of removal.