Section 12-02: Heating and Defrosting | 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual |
Removal
Allow the engine (6007) to cool. Then, observing the safety precautions in Section 03-03, proceed as follows.
Place a thick cloth over the radiator cap.
Turn the cap slowly to its first stop to release system pressure.
When the pressure has been released, tighten the radiator cap.
Disconnect the heater water hoses (18472) from the heater core (18476), and plug the heater water hoses.
For easier access, remove the glove compartment.
From inside the passenger compartment, remove the seven screws that attach the heater core cover (18B300) to the heater air plenum chamber (18471). It will be necessary to move a RABS module out of the way on F-Series prior to removing the cover.
Disconnect the vacuum source. Leave the vacuum hose harness (19C827) attached to the cover. Remove the cover.
Remove the heater core from the heater air plenum chamber.
Installation
Position the heater core and seal in the plenum heater air plenum chamber.
Install the heater core cover on the heater air plenum chamber and secure it with its seven attaching screws. Be certain that the vacuum hose harness is not trapped or pinched during the cover installation. Reinstall RABS module if applicable.
Connect the vacuum hose harness to its source connection.
Install heater water hoses on the heater core at dash panel in engine compartment. Do not overtighten the clamps.
Check coolant level and add coolant as required. Refer to Section 03-03.
Check system for proper operation and coolant leaks.
| Item | Part Number | Description |
|---|---|---|
| 1 | 18B300 | Heater Core Cover |
| 2 | 18476 | Heater Core |
| 3 | — | Heater Core Tubes (Part of 18476) |
| 4 | 18658 | Heater Core Case Seal |
| 5 | 18471 | Heater Air Plenum Chamber |
| 6 | 18A318 | Vacuum Control Motor |