Kia Optima: Air Conditioning System / Refrigerant Line

Kia Optima DL3 2019-2025 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")

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)

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).

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.)

Compressor oil

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

Compressor

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. The compres ...

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