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My buddys evaporator is hissing when i charged his a/c system.Guessing it has a leak Does anyone have info on removal or a web page.I cant seem to find anything.Thanks gene.

Here is some info right out of chrysler dealerconnect. Hope this helps.. Book pays 6.6 for this job so you'll be busy most of the day.

EVAPORATOR
The Heater A/C housing must be removed from the vehicle when replacing the evaporator.
REMOVAL
1. Open hood and disconnect the negative battery cable remote terminal from the remote battery post Negative Battery Cable Remote Terminal
CAUTION: The refrigerant must be removed from the system before removing Heater-A/C housing. Use a refrigerant recovery machine. A/C lines at Thermostatic Expansion Valve must be removed and the exposed fittings must be capped off to prevent moisture from entering the system.
2. Remove heater housing from vehicle. Refer to Heater-A/C Housing Removal and Installation in this section for procedure.
3. Remove recirculation door actuator.
4. Remove recirculation door and housing.
5. Remove upper housing retaining screws.
6. Remove upper half of heater housing.
7. Lift evaporator out of lower housing.
8. Transfer evaporator probe. Place the evaporator probe in the same location as on the previous evaporator.
INSTALLATION
For installation, reverse the above procedures.


HVAC UNIT HOUSING
REMOVAL
1. Open hood and disconnect the negative battery cable remote terminal from the remote battery post Negative Battery Cable Remote Terminal This must be done to prevent accidental air bag deployment.
2. Remove instrument panel from vehicle. Refer to Group 8E, Instrument Panel and Systems for Removal and Installation procedures.
3. Using an A/C recovery unit, remove all R-134a refrigerant from the A/C system.
4. Drain the engine cooling system.
5. Remove air cleaner hose and air distribution duct from the engine.
6. Remove spring type fasteners to heater hoses at the dash panel and remove hoses from heater core. Plug the heater core inlet and outlet tubes to prevent anti-freeze from spilling on the vehicle interior during removal. If an appropriate plug cannot be found pull back carpet and use caution when removing unit. Keep the heater tubes elevated to prevent spillage of coolant.
7. Remove one nut at expansion valve retaining both A/C lines to expansion valve. After removing lines cap the expansion valve openings and the A/C hose openings. This will prevent any dirt or moisture from entering the refrigerant system during servicing
CAUTION: The lubricant used in this air conditioning system absorbs moisture readily (similar to brake fluid) Do not leave any portion of the system open for extended periods of time.
8. Remove the three retaining nuts from the studs. These studs project through the dash panel into the engine compartment.
9. Remove two screws to defrost duct and remove.
10. Remove two nuts, two screws attaching hvac housing to dash panel.
11. Remove four nuts retaining rear seat heat duct and remove.
12. Remove rear seat heat duct elbow push pin fastener.
13. Disconnect HVAC harness connector.
14. Gently pull hvac unit housing rearward from dash panel, being careful not to spill any coolant into passenger compartment.
INSTALLATION
For installation, reverse the above procedures.

the hissing is when the system is low and you hear it passing through the h/valve . you can try a sniffer but after 15 yrs my eyes and nose are better .under the dash on the pass. side is a twist off connectoter plate for the evap fin temp sensor.pop it loose turn it 180 on its side and look inside for the foam isulation to be yellow/green and full of siticky debris . also look at the condencer in front of the rad ,h/valve gaskets and where the hoses cross for oil any oil is a leak .r134 molicules are so small that it is normal to loose about 3oz in 6 yrs. after about 100 of these you can get it down under 2hrS . dont remove the dash tip it and bungy it to the pass side assist handle and only undo the wires on the pass side and door jamb . the hoses for the heater will be your fun spot i heat em with a heat gun to get em loose!