Kia Optima DL3: Air Conditioning System / Refrigerant Line

Kia Optima DL3 2019-2026 Service and Repair Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / Refrigerant Line

Components and components location

Components Location

1. Suction & Liquid tube assembly
2. Discharge hose

Repair procedures

Replacement
1.

If the compressor is marginally operable, run the engine at idle speed, and let the air conditioning work for a few minutes, then shut the engine off.
2.

Disconnect the negative (-) battery terminal.
3.

Recover the refrigerant with a recovery / charging station.
4.

Remove the engine mounting support bracket.

G 2.0 NU MPI (Refer to Engine Mechanical System - "Engine Mounting")

G 2.5 GDI THETA II (Refer to Engine Mechanical System - "Engine Mounting")

5.

Loosen the mounting nut and remove the expansion valve cover (A).

Tightening torque :

8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 Ib-ft)

6.

Remove the bolts and the expansion valve (A) from the evaporator core.

Tightening torque :

8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 Ib-ft)
  

Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.

7.

Press the lock pin and separate the A/C pressure transducer connector (A).
8.

Loosen the mounting nuts, remove the suction line (A) and discharge line (B).

Tightening torque :

8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 Ib-ft)

9.

Remove the engine room under cover.

G 2.0 NU MPI (Refer to Engine Mechanical System - "Engine Cover")

G 2.5 GDI THETA II (Refer to Engine Mechanical System - "Engine Cover")

10.

Remove the bolts, then disconnect the suction line (A) and discharge line (B) from the compressor.

Tightening torque :

21.6 - 32.4 N.m (2.2 - 3.3 kgf.m, 15.9 - 23.9 Ib-ft)
  

Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.

11.

Remove the suction & liquid tube assembly (A) to the upper of engine room.
12.

To install, reverse the removal procedure.

  
•

Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
•

Tighten the bolt or nut joint to the specified torque.
•

Using a gas leak detector, check for refrigerant leakage.
•

Evacuate air in the refrigeration system and charge system with refrigerant.

Specified amount

• R-134a : 600 ± 25 g (21.2 ± 0.88 oz.)

• R-1234yf : 520 ± 25 g (18.3 ± 0.88 oz.)

    Repair procedures Oil Specification 1. The HFC-134a system requires synthetic (PAG) compressor oil whereas the R-12 system requires mineral compressor oil.

    Description and operation Description The compressor is the power unit of the A/C system. It is located on the side of engine block and driven by a V-belt of the engine.

    Other information:

    Kia Optima DL3 2019-2026 Service and Repair Manual: Evaporator Temperature Sensor

    Description and operation Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC).

    Kia Optima DL3 2019-2026 Service and Repair Manual: Climate Control Air Filter

    Description and operation Description The climate control air filter is located in the blower unit. It eliminates foreign materials and odor. The particle filter performs a role as an odor filter as well as a conventional dust filter to ensure comfortable interior environment.

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