Heating and Ventilation

HEATER CORE AND EVAPORATOR CORE HOUSING







Removal and Installation

CAUTION: Refrigerant compressor oil (mineral oil) should be used to lubricate R-134a refrigerant system O-ring seals only and should not be added to the R-134a refrigerant system as an A/C compressor lubricant. PAG refrigerant compressor oil only should be used as an A/C compressor lubricant.

NOTE:
- If an evaporator core leak is suspected, the evaporator core must be vacuum leak tested before it is removed from the vehicle.
- Installation of a new 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 accumulator.
- New O-ring seals, lubricated in clean mineral oil, must be installed before reconnecting any A/C fitting which has been disconnected.
- Lubricate the coolant hoses with plain water only if needed.

1. Recover the refrigerant.
2. Remove the instrument panel. Refer to Body and Frame, Interior Moulding/Trim, Dashboard/Instrument Panel, Service and Repair, Removal and Installation, Removal and Installation

3. Disconnect the wire harness.







4. Detach the wiring harness bracket and position the harness aside.







5. Remove the heater tube bracket nut.







6. Clamp the heater core inlet and outlet hoses near the heater core connection.







7. Disconnect the 2 heater hose clamps.







8. Remove the A/C line bracket nut at the inner fender well.







9. Remove the A/C line bracket nut at the dash panel.
10. Disconnect the 2 A/C line fittings.
- Discard the O-ring seals.







11. Disconnect the vacuum connector.







12. Detach the grommet and push the vacuum lines into the passenger compartment.
13. Remove the 4 heater core and evaporator core housing nuts.
14. Disconnect the ground terminal bolt.
15. Remove the heater core and evaporator core housing.
16. To install, reverse the removal procedure.
- Install new O-ring seals lubricated in clean mineral oil.
- Lubricate the refrigerant system with the correct amount of clean PAG oil.

17. Fill and bleed the engine cooling system.
18. Evacuate, leak test and charge the refrigerant system.