Durango 4WD V8-5.9L VIN Z (1998)
Hose/Line HVAC: Service and Repair
B-Pillar Refrigerant Line Replacement
The B-pillar refrigerant lines are used only on models with the optional rear overhead A/C unit. Both the B-pillar suction line and the B-pillar liquid line
are available for separate service replacement. Each line may be removed independently from the vehicle 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:
Service and Repair/Refrigerant Recovery
3. Raise and support the vehicle.
4. 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.
5. Lower the vehicle.
6. Remove the headliner from the passenger compartment of the vehicle. The B-pillar upper and lower trim must be removed.
Rear Overhead A/C Unit Refrigerant Line Remove/Install
7. From the passenger compartment, remove the fasteners that secure the block fittings at the top of the B-pillar refrigerant lines to the rear overhead
A/C unit (nut from stud-liquid line) (nut and bolt-suction line), and disengage the fittings. Install plugs in, or tape over all of the opened refrigerant
line fittings.
