RAM 2500 Van V8-5.2L VIN Y (1998)
Heater Hose: Service and Repair
Underbody Plumbing
The underbody plumbing lines are used only on models with the optional rear heater-A/C unit. While the underbody suction line, liquid line, and
combination heater line are available for separate service replacement, all lines must be removed from the vehicle as a unit for service.
Any kinks or sharp bends in the underbody plumbing will reduce the capacity of the entire heating and air conditioning system. Kinks and sharp bends
reduce the system flow. High pressures are produced in the refrigerant system when the air conditioning compressor is operating. High temperature
coolant is present in the heater plumbing when the engine is operating. Extreme care must be exercised to make sure that each of the plumbing
connections is pressure-tight and leak free.
WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE GENERAL INFORMATION BEFORE PERFORMING THE
FOLLOWING OPERATION.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Recover the refrigerant from the refrigerant system.
4. From the engine compaftment, disconnect the underbody liquid line at the liquid line extension and the underbody suction line at the suction line
jumper. Install plugs in, or tape over all of the opened refrigerant line fittings.
5. From the engine compaftment, disconnect the heater supply and return hoses from the underbody combination heater line.
6. Remove the engine cover from the passenger compaftment.
7. Raise and support the vehicle.
8. Disengage the front park brake release cable routing clip from the underbody suction line.
Rear Heater-A/C Pluming Connections Remove/Install
9. From under the vehicle, disconnect the flare nut on the underbody liquid line from the threaded
10. From under the vehicle, disconnect the flare nut on the underbody suction line from the threaded fitting on the rear heater-A/C unit suction line.
Install plugs in, or tape over all of the opened refrigerant line fittings.
11. From under the vehicle, disconnect the heater supply and return hoses from the rear heater-A/C unit heater lines.
