Heater Core Case: Service and Repair

HEATER CORE AND EVAPORATOR CORE HOUSING







Removal and Installation

NOTE:
- If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle.
- If a heater core leak is suspected, the heater core must be leak tested before it is removed from the vehicle.
- Failure to correctly install the evaporator core seal when installing the evaporator core will result in decreased A/C cooling efficiency due to airflow bypassing the evaporator core.
- Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of contamination from a failed A/C compressor or damage to the suction accumulator.

1. Remove the instrument panel. Refer to: Body and Frame, Interior Moulding/Trim, Dashboard/Instrument Panel, Service and Repair, Service and Repair

2. Remove the suction accumulator.
3. Disconnect the evaporator core spring lock coupling.
- Discard the O-ring seals.

4. Clamp off and disconnect the 2 heater core quick disconnect fittings.
5. Remove the 3 heater core and evaporator core housing nuts.
- To install, tighten to 9 Nm (80 lb-in).

6. Disconnect the 2 harness electrical connectors.
7. Remove the air inlet duct bracket nut.
- To install, tighten to 7 Nm (62 lb-in).







8. Remove the bolt and position the junction box aside.







9. Loosen the nut and remove the heater core and evaporator core housing.
1 Detach the clip.
2 Completely loosen the nut.
- To install, tighten to 7 Nm (62 lb-in).

3 Remove the heater core and evaporator core housing.

10. To install, reverse the removal procedure.
- Install new O-ring seals.
- Lubricate the refrigerant system with the correct amount of clean PAG oil.

11. Fill the engine cooling system.