Some 2018 Lincoln Navigator and Ford Expedition vehicles built on or before Sept. 5, 2018, may exhibit an overheating condition, low antifreeze/coolant, and/or a coolant leak at the rear of the vehicle.
Raise the vehicle on a hoist and inspect for an antifreeze leak from the rear of the vehicle, behind the right rear tire. If a leak is found, replace the rear climate control housing.
Refer to the workshop manual section 412-02. During the climate control housing replacement, inspect the electrical connectors for fluid contamination.
If contamination is present, clean the connectors using terminal cleaner and compressed air before reconnecting.
PARTS
JL1Z-19850-AJ............Rear climate control housing
HL3Z-19B596-A..........A/C hose kit
VC-3-B........................Motorcraft orange concentrated antifreeze (all except Canada)
CVC-3-B2....................Motorcraft orange concentrated antifreeze (Canada)
VC-13-G......................Motorcraft orange concentrated antifreeze
………………….……..(vehicles built on or after July 9, 2018, all except Canada)
CVC-13-G....................Motorcraft orange concentrated antifreeze
………………………....(vehicles built on or after July 9, 2018, Canada)
YN-35..........................Motorcraft R-1234yf refrigerant PAG oil
