RAM 3500 Van V8-5.9L VIN Z LDC (1998)
Evaporator Core: Service and Repair
Combination Coil Removal and Installation
The combination coil is used only on models with the optional rear heater-A/C unit. The combination coil can be removed without removing the rear
heater-A/C unit from the vehicle.
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. Remove the expansion valve from the combination coil.
3. Drain the engine cooling system. Refer to: "Engine, Cooling and Exhaust : Service and Repair" See: Engine, Cooling and Exhaust/Cooling
System/Service and Repair
4. Disconnect the rear heater-A/C unit heater hoses from the combination coil heater tubes. Install plugs in, or tape over the opened combination coil
heater tubes and hoses.
5. Remove the vertical duct from the rear heater-A/C unit.
6. Remove the horizontal duct from the rear heater-A/C unit.
7. Remove the upper housing from the rear heater-A/C unit.
Evaporator Coil Remove/Install
8. Lift the combination coil out of the rear heater-A/C unit lower housing.
INSTALLATION
1. Insert the combination coil into the bottom of the rear heater-A/C unit lower housing.
2. Reinstall the upper housing onto the rear heater-A/C unit.
3. Reinstall the horizontal duct to the rear heater- A/C unit.
4. Reinstall the vertical duct to the rear heater-A/C unit.
5. Unplug or remove the tape from the rear heater-A/C unit combination coil heater tubes and hoses. Connect the heater hoses to the combination coil
heater tubes and fill the engine cooling system.
6. Reinstall the expansion valve to the combination coil.
NOTE: If the combination coil is replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. Use only refrigerant oil
of the type recommended for the compressor in the vehicle.
