Durango 4WD V8-5.9L VIN Z (1998)
Hose/Line HVAC: Service and Repair
Underbody Refrigerant Line Replacement
The underbody refrigerant lines are used only on models with the optional rear overhead A/C unit. Both the underbody suction line and the underbody
liquid line are available for separate service replacement, and may be removed from the vehicle independently for service.
Any kinks or sharp bends in the refrigerant plumbing will reduce the capacity of the entire air conditioning system. Kinks and sharp bends reduce the
flow of refrigerant in the system. High pressures are produced in the refrigerant system when the air conditioning compressor is operating. Extreme care
must be exercised to make sure that each of the refrigerant system connections is pressure-tight and leak free.
WARNING: REVIEW THE WARNINGS AND CAUTIONS BEFORE PERFORMING THE FOLLOWING OPERATION.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Recover the refrigerant from the refrigerant system. Refer to: Heating and Air Conditioning, Service and Repair, Refrigerant Recovery, See:
Heating and Air Conditioning/Service and Repair/Refrigerant Recovery
Underbody Refrigerant Line Remove/Install
3. From the engine compartment, disconnect the underbody liquid line refrigerant line coupler at the liquid line extension and the underbody suction
line refrigerant line coupler at the suction line jumper. See Refrigerant Line Coupler in the Replacement. Install plugs in, or tape over all of the
opened refrigerant line fittings.
4. Raise and support the vehicle.
5. From under the vehicle, disconnect the underbody liquid line refrigerant line coupler at the B-pillar liquid line and the underbody suction line
refrigerant line coupler at the B-pillar suction line. See Refrigerant Line Coupler in the Replacement for the procedures. Install plugs in, or tape
over all of the opened refrigerant line fittings.
6. Remove the screws that secure the three underbody refrigerant line clamps to the underbody
7. Remove the underbody refrigerant line unit from the vehicle.
INSTALLATION
1. From under the vehicle, position the underbody refrigerant line unit to the underbody and secure the refrigerant line clamps with the mounting
screws in three places. Tighten the mounting screws to 2.2 N.m (20 in. lbs.).
2. Remove the tape or plugs from the refrigerant line fittings at the rear of the underbody liquid and suction lines and at the B-pillar liquid and
suction lines. Connect the underbody refrigerant lines to the B-pillar refrigerant lines. See Refrigerant Line Coupler in the Replacement for the
procedures.
3. Lower the vehicle.
4. From the engine compartment, remove the tape or plugs from the refrigerant line fittings at the front of the underbody liquid and suction lines and
at the liquid line extension and the suction line jumper. Connect the underbody refrigerant lines to the engine compartment refrigerant lines. See
Refrigerant Line Coupler in the Replacement for the procedures.
5. Connect the battery negative cable.
6. Evacuate the refrigerant system. Refer to: Heating and Air Conditioning, Service and Repair, Refrigerant System Evacuate, Evacuating the
