Evaporator Core: Service and Repair

REMOVAL

Heater/Evaporator Housing:

1. Disconnect battery cables and remove battery.
2. Discharge refrigerant system.
3. Remove center vent/control panel.
4. Remove instrument panel.

Heater/Evaporator Housing Coolant Hoses:

5. Clamp heater hoses A and B to prevent excess engine coolant loss.
- A = return to water pump.
- B = feed to cylinder head.
6. Loosen clamps and remove hoses from fittings.
7. Cap hoses.
8. Remove A/C refrigerant lines from evaporator.

Air Plenum Cover:

9. Remove right side air plenum cover
10. Remove outside temperature sensor B.
11. Remove mounting bolts A.
12. Remove air intake.

Heater/Evaporator Connections:

13. Remove nuts A on firewall.
14. Remove vacuum hose from two way valve.
15. Remove water drain hose from heater/evaporator housing.

Fuel Injection Control Unit:

16. Remove fuel injection control unit (see arrow).
17. Remove heater/evaporator housing.

Heater/Evaporator Assembly:

18. Remove heater plenum chamber retaining clips.
19. Carefully pry the heater plenum chamber from the evaporator housing.





20. Unlatch air intake duct clips, remove air duct.
21. Remove evaporator housing case half retaining clips.
22. Carefully pry the evaporator case halves apart.
23. Remove evaporator.

INSTALLATION
- Installation is the reverse of removal.
NOTE:
- Be sure evaporator case halves seal properly during installation. Use silicone sealer during assembly.
- Intake ring is keyed in lower evaporator case to prevent turning.