Evaporator Core: Service and Repair

Air Conditioning Evaporator Core Replacement

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

1. Remove the HVAC module from the vehicle. Refer to HVAC Module Assembly Replacement (HVAC Module Assembly Replacement).




2. Remove the heater core cover heat stakes with a small chisel.




3. Remove the heater core.




4. Unsnap and open the passenger compartment filter door.
5. Remove the lower HVAC case screws.




6. Remove the lower HVAC case.




7. Remove the evaporator core.

Installation Procedure

1. If replacing the evaporator core, add polyalkylene glycol (PAG) oil to the evaporator core. Refer to Refrigerant System Capacities (Capacity Specifications).




2. Install new seal washers to the evaporator core fittings.
3. Install the thermal expansion valve (TXV).

Caution: Refer to Fastener Caution (Fastener Caution).

4. Install the TXV bolts and tighten to 7 Nm (62 lb in).




5. Install the foam seals to the evaporator core.
6. Install the evaporator core into the HVAC module assembly.





Note: Make certain that the orifice plate is correctly positioned in the HVAC module. Make certain that the lower HVAC case is properly positioned and is fully seated on the HVAC module before installing the screws. Be sure to install all lower HVAC case screws.

7. Install the lower HVAC case.




8. Install the lower HVAC case screws and tighten to 1.8 Nm (15 lb in).
9. Close and secure the passenger compartment filter door.




10. Inspect the foam heater core seal on the lower HVAC case. If damaged, replace using Kent Industries adhesive black foam tape P/N 46480 or equivalent.
11. Install the heater core into the HVAC module.





Note: Make certain that the heater core cover is properly positioned and is fully seated on the HVAC module before installing the screws. Be sure to install all heater core cover screws.

12. Install the heater core cover.
13. Install the heater core cover screws and tighten to 1.8 Nm (15 lb in).
14. Install the HVAC module into the vehicle. Refer to HVAC Module Assembly Replacement (HVAC Module Assembly Replacement).
15. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
16. Leak test the fittings using the J 39400-A .
17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Service and Repair).
18. Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (Static Fill LNF) (Service and Repair)Cooling System Draining and Filling (Static Fill LE5, L61) (Service and Repair).