Hyundai Tucson LM Quiz
Heating, Ventilation, and Air Conditioning

Compressor Oil Repair Procedures

In this manual: Heating, Ventilation, and Air Conditioning
General Information — 1Engine Mechanical System — 44Engine Electrical System — 45Emission Control System — 24Engine Control System/Fuel System — 93Clutch System — 13Manual Transmission — 18Automatic Transmission — 87Four-Wheel Drive (4WD) System — 26Drive Shaft and Axle — 29Suspension System — 35Steering — 20Restraints — 47Brake System — 36Body (Interior and Exterior) — 53Body Electrical System — 202Heating, Ventilation, and Air Conditioning — 58
10steps
~60min
3/5difficulty
Done 0 of 10

Oil Specification

  1. The HFC-134a system requires synthetic (PAG) compressor oil, while the R-12 system requires mineral compressor oil. The two oils must never be mixed.
  2. Compressor oil (PAG) depends on the compressor model. Be sure to use the oil specified for the compressor model.
  3. The oil must not contain moisture, dust, metal powder, or the like.
  4. Do not mix with other oil.
  5. The water content of the oil increases when exposed to air. Immediately seal the oil from air after use. (HFC-134a compressor oil readily absorbs moisture.)
  6. Compressor oil must be stored in steel containers, not plastic.
Handling of Oil. Compressor Oil Inspection. The oil used to lubricate the compressor circulates with the refrigerant. Whenever any system component is replaced or a large amount of gas leaks, add oil to maintain the original oil quantity.

Total oil quantity in system, PAG oil: 120 ± 10 cm³

Oil Return Operation: There is a close relationship between oil and refrigerant. During normal operation, part of the oil circulates with the refrigerant in the system. When checking the oil quantity in the system or replacing any system component, the compressor must be operated in advance for the oil return operation. The procedure is as follows:
  1. Open all doors and the hood.
  2. Start the engine and set the air conditioner switch to "ON", and set the blower fan control knob to the maximum position.
  3. Operate the compressor for more than 20 minutes at 800 to 1000 rpm to stabilize the system.
  4. Stop the engine.
Component Replacement: When replacing system components, add the following quantity of oil to the components being installed.
Components to be installed Oil Capacity
Evaporator 50 cc (1.70 fl oz)
Condenser 30 cc (1.02 fl oz)
Refrigerant Line
(One Piece)		 10 cm3 (0.34 fl oz)

When replacing the compressor, subtract the volume of oil drained from the removed compressor from the specified volume, and drain the calculated volume of oil from the new compressor: Specified volume - volume drained from removed compressor = volume to drain from new compressor.
Even if oil is not drained from the removed compressor, do not drain more than 50 cm³ from the new compressor.

Test yourself

A quick Hyundai Tucson LM quiz: every answer comes with an explanation and a link to the manual page.