Navigator 2WD V8-5.4L (2007)
5. Remove the heater core door screw.
6. Remove the 2 auxiliary heater core tube fitting clips.
7. Disconnect the 2 auxiliary heater core tubes.
1
Position the auxiliary heater core partially out of the housing.
2
Disconnect the auxiliary heater core inlet tube.
3
Disconnect the auxiliary heater core outlet tube.
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Discard the O-ring seals.
8. Remove the auxiliary heater core.
9. NOTE:
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Use only the O-ring seals contained in the auxiliary heater core service kit.
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Verify that the heater core tube fittings are completely seated in the heater core before installing the heater core tube fitting clips.
To install, reverse the removal procedure.
10. Fill the engine cooling system.
