Q: How to remove and install a radiator and Coolant Reservoir on a Lincoln Navigator?
A: Disconnect the cable from the negative battery terminal. Drain the cooling system, then disconnect the lower hose from the coolant reservoir. Disconnect the overflow hose, then remove the bolts and pull the coolant reservoir straight up. Prior to installation make sure the coolant reservoir is clean and free of debris which could be drawn into the radiator. Installation is the reverse of removal. On 2007 and later models, have the refrigerant recovered before beginning this procedure. Remove the cooling fan and shroud assembly. On 2007 and later models, also remove the two end panels that are secured by pushpins. If equipped with an automatic transmission, detach the cooler lines from the radiator. Disconnect the upper and lower radiator hoses. Remove both headlight housings and, on 2008 and later models, remove the front bumper cover. Disconnect and plug the refrigerant lines at the condenser. Disconnect the horn wiring at the side of the radiator and remove the horns. Remove the bolts on the sides of the radiator. Push the radiator assembly toward the engine and push on the two lower condenser-to-radiator clips until the radiator is separated from the condenser. On earlier models, remove the mounting bolts and take off the two upper radiator mounts and the mounts that hold the lug wrench and jack handle. On all models, carefully lift the radiator out of the vehicle. Prior to installation of the radiator, replace any damaged hose clamps and radiator hoses. Radiator installation is the reverse of removal. When installing the radiator on earlier models, make sure it seats properly in the lower saddles and that the rubber mounts are intact. After installation, fill the system with the proper mixture of antifreeze, and also check the automatic transmission fluid level.