Navigator 4WD V8-5.4L (2010)
Heater Core: Service and Repair
Auxiliary Heater Core
Auxiliary Heater Core - Expedition, Navigator
Removal and Installation
NOTE: If a heater core leak is suspected, the heater core must be pressure leak tested before it is removed from the vehicle.
1. Remove the auxiliary heater core and evaporator core housing. For additional information, refer to Auxiliary Heater Core and Evaporator Core
Housing - Expedition, Navigator See: Housing Assembly HVAC/Service and Repair/Auxiliary Heater Core and Evaporator Core Housing.
2. Release the clip and open the floorpan bracket.
3. Remove the heater core tube bracket screw and the heater core tube bracket.
4. Remove the 12 evaporator/heater core access cover screws.
5. Remove the evaporator/heater core access cover.
6. Remove the heater core.
7. To install, reverse the removal procedure.