how do i remove/install an a/c evaporator in a 98 dodge ram?

Question

it is a 98 4x4 quad cab diesel

Answer 1

Notes

This procedure may require the removal and installation of the instrument panel and/or some its components. For these procedures. Refer to: "Instrument Panel, Gauges and Warning Indicators : Instrument Panel : Service and Repair" See: Instrument Panel, Gauges and Warning Indicators\Instrument Cluster / Carrier\Service and Repair

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS,REFER TO PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS. COULD RESULT IN ACCIDENTAL AIR- BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

HEATER-A/C HOUSING
The heater-A/C housing assembly must be removed from the vehicle and disassembled for service access of the heater core, evaporator coil, and each of the various mode control doors. Refer to: "Heating and Air Conditioning : Service and Repair" See: Service and Repair

REMOVAL


Disconnect and isolate the battery negative cable.
Remove the instrument panel. Refer to: "Instrument Panel, Gauges and Warning Indicators : Instrument Panel : Service and Repair" See: Instrument Panel, Gauges and Warning Indicators\Instrument Cluster / Carrier\Service and Repair
If the vehicle is not equipped with air conditioning, go to Step 6. If the vehicle is equipped with air conditioning, recover the refrigerant from the refrigerant system, please refer to "Heating and Air Conditioning : Service and Repair" See: Service and Repair
Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube. Install plugs in, or tape over all of the opened refrigerant line fittings.
Disconnect the accumulator inlet tube refrigerant line fitting from the evaporator outlet tube.Install plugs in, or tape over all of the opened refrigerant line fittings.
Drain the engine cooling system. Refer to: "Engine, Cooling and Exhaust : Cooling System : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
Disconnect the heater hoses from the heater-tubes.Install plugs in, or tape over the opened core tubes.
Remove the Powertrain Control Module (PCM) from the dash panel and set it aside, but do not unplug the PCM wire harness connectors. Refer to: "Powertrain Management : Computers and Controls : Engine Control Module : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
Remove the nuts from the heater-A/C housing mounting studs on the engine compartment side of the dash panel.
Fig 47 Heater-A/C Housing








Remove the nuts that secure the heater A/C housing to the mounting studs on the passenger compartment side of the dash panel
Pull the heater A/C housing rearward far enough for the mounting studs and the evaporator condensate drain tube to clear the dash panel holes.
Remove the heater A/C housing from the vehicle. Refer to: "Heating and Air Conditioning : Housing Assembly HVAC : Service and Repair" See: Service and Repair
DISASSEMBLY



Place the heater-A/C housing upside down on a work bench.
Remove the screw that secures the floor duct to the bottom of the heater A/C housing and slide the floor duct off of the center heat duct adaptor.
Unsnap the center heat duct adaptor from the bottom of the heater-A/C housing and remove the screw that was hidden by the adaptor.
Remove the remaining screws on the bottom of the heater-A/C housing that secure the two housing halves together.
Place the heater-A/C housing right side up on the work bench.
Separate the top half of the heater-A/C housing from the bottom half and set it aside.
ASSEMBLY



Position the top half of the heater-A/C housing over the bottom half£ Be certain that the mode door pivot pins are properly inserted in their pivot holes.
Place the heater-A/C housing upside down on the work bench.
Install and tighten the screws on the bottom of the heater-A/C housing that secure the two housing halves together. Tighten the screws to 2.2 Nm (20 in. lbs.) .
Snap the center heat duct adaptor onto the bottom of the heater-A/C housing.
Slide the floor duct onto the center heat duct adaptor and secure it with a screw to the bottom of the heater-A/C housing. Tighten the mounting screw to 2.2 Nm (20 in. lbs.) .
INSTALLATION



Position the heater-A/C housing to the dash panel be certain that the evaporator condensate drain tube and the housing mounting studs are inserted into their correct mounting holes.
Install the nuts that secure the heater-A/C housing to the mounting studs on the passenger compartment side of the dash panel. Tighten the nuts to 4.5 Nm (40 in. lbs.) .
Install and tighten the nuts onto the heater-A/C housing mounting studs on the engine compartment side of the dash panel. Tighten the nuts to 7 Nm (60 in. lbs.) .
Unplug or remove the tape from the heater core tubes. Connect the heater hoses to the heater core tubes and fill the engine cooling system. Refer to: "Engine, Cooling and Exhaust : Cooling System : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
IF the vehicle is not equipped with air conditioning, go to Step 10. if the vehicle is equipped with air conditioning, unplug or remove the tape from the accumulator inlet tube and the evaporator outlet tube fittings. Connect the accumulator inlet tube coupler to the evaporator outlet tube.
Unplug or remove the tape from the liquid line and the evaporator inlet tube fittings. Connect the liquid line coupler to the evaporator inlet tube.
Evacuate the refrigerant system. Refer to: "Heating and Air Conditioning : Service and Repair" See: Service and Repair
Charge the refrigerant system. Refer to: "Heating and Air Conditioning : Service and Repair" See: Service and Repair
Reinstall the PCM to the dash panel. Refer to: "Powertrain Management : Computers and Controls : Engine Control Module : Service and Repair" See: Engine, Cooling and Exhaust\Cooling System\Service and Repair
Reinstall the instrument panel in the vehicle. Refer to: "Instrument Panel,Gauges and Warning Indicators : Instrument Panel : Service and Repair" See: Instrument Panel, Gauges and Warning Indicators\Instrument Cluster / Carrier\Service and Repair
Connect the battery negative cable.
Start the engine and check for proper operation of the heating and air conditioning systems.

Answer 2

Step#1 Remove dashboard. Good Luck

Answer 3

I've had to replace alot of evaporators in dodge's. From experience, Take it to a professional. The cost to get it changed is worth it vs. changing yourself.

Answer 4

how do i remove the passenger side of dash to get to the ac evaporator core of 97 dodge ram 3500 and how do i remove evaporator core?

Answer 5

not for the faint of heart. i would get the haynes manual for that truck and go from there, this is not something that should be discused here