Navigator 2WD V8-5.4L (2007)
9. NOTE: If only one auxiliary heater line is to be removed, disconnect only the desired line.
Disconnect the auxiliary heater outlet and inlet line rear quick disconnect fitting(s).
10. Remove the muffler.
11. Remove the 3 spare tire carrier splash shield bolts and the spare tire carrier splash shield.
12. Remove the 3 muffler heat shield bolts and the muffler heat shield.
13. Remove the 2 exhaust hanger bolts and the exhaust hanger.
14. Remove the RH catalyst monitoring sensor.
15. Remove the 3 remaining RH catalytic converter heat shield bolts and the heat shield.
16. Remove the 3 remaining auxiliary line bracket nuts and the line brackets.
17. NOTE: If installing only one auxiliary heater line, cut only the desired line.
Assemble and lay out the replacement line(s) in the same position as the existing line(s) and, using a suitable tool, cut the auxiliary heater line(s) in
the same position as the fittings on the new line(s).
18. Remove the auxiliary heater line(s) in 3 separate pieces.
Installation
Expedition or Navigator only
1. Install the rear portion of the auxiliary heater outlet and inlet line(s) and connect the quick disconnect fittings.
All vehicles
2. Install the front auxiliary heater line(s) and connect the quick disconnect fittings.
3. NOTE: Loosely connect, but do not tighten, the fittings.
Install the middle auxiliary heater line(s).
4. Starting from the rear of the vehicle, install the first 3 auxiliary line brackets and nuts.
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Tighten to 5 Nm (44 lb-in).
5. Tighten the middle auxiliary heater line fittings.
6. Inspect the auxiliary heater lines for correct installation. Loosen, reposition and tighten as needed.
7. Install the RH catalytic converter heat shield and the 3 catalytic converter heat shield rear bolts.
8. Install the RH catalyst monitoring sensor.
9. Install the exhaust hanger and the 2 exhaust hanger bolts.
10. Install the muffler heat shield and the 3 muffler heat shield bolts.
11. Install the muffler.
12. Install the spare tire carrier splash shield and the 3 spare tire carrier splash shield bolts.
13. Working through the RH fender well opening, Install the RH catalytic converter heat shield front bolt.
14. Install the front auxiliary line bracket and the front auxiliary line bracket and nut.
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Tighten to 5 Nm (44 lb-in).
15. Install the RH front fender splash shield.
16. Install the RH front wheel.
Expedition EL or Navigator L only
17. Install the RH rear wheel and tire assembly.
