Standard Procedure - Refrigerant Oil Level
Vehicles with High Voltage Electric Compressors require unique oils compatible with High Voltage components. Mixing oils can be detrimental to HV performance. A separate injector is recommended to be used with HV Vehicles to prevent cross contamination.
When an A/C system is assembled at the factory, all components except the A/C compressor are refrigerant oil free. After the refrigerant system has been charged and operated, the refrigerant oil in the A/C compressor is dispersed throughout the refrigerant system. The A/C receiver/drier, A/C evaporator, A/C condenser and the A/C compressor will each retain a significant amount of the needed refrigerant oil.
It is important to have the correct amount of refrigerant oil in the A/C system. This ensures proper lubrication of the A/C compressor. Too little oil will result in damage to the A/C compressor, while too much oil will reduce the cooling capacity of the A/C system and consequently result in higher discharge air temperatures.
Be certain to adjust the refrigerant system oil level when replacing an A/C compressor. Failure to properly adjust the refrigerant oil level can prevent the A/C system from operating as designed and can cause serious A/C compressor damage.
Most reclaim/recycling equipment will measure the lubricant being removed during recovery. This amount of lubricant should be added back into the system. See the reclaim/recycling equipment manufacturers instructions.
It will not be necessary to check the oil level in the A/C compressor or to add oil, unless there has been an oil loss. An oil loss may occur due to a rupture or leak from a refrigerant line, connector fitting, component or a component seal. If a leak occurs, add 30 milliliters (1 fluid ounce) of refrigerant oil to the refrigerant system after the repair has been made. Refrigerant oil loss will be evident at the leak point by the presence of a wet, shiny surface around the leak.
Refrigerant oil must be added when an A/C condenser, A/C receiver/drier or A/C evaporator is replaced (see the Refrigerant Oil Capacities chart).
The refrigerant oil level in a new A/C compressor must first be adjusted prior to compressor installation.
1234yf oil levels can be adjusted through the use of an approved oil injection syringe (available through Mopar Service Equipment). Fill the syringe with the correct amount of the correct oil per the adjustment chart. With the system charged, connect the syringe tool to the vehicles' low pressure port. With the engine running at idle, with AC on and blower set to low. Slowly open the valve on the injector while observing the oil being drawn into the system. Once the oil is injected, close the valve, disconnect from the vehicle.
| Component | ml | fl oz |
|---|---|---|
| Total System Fill - Front A/C only | 140 | 4.73 |
| Total System Fill - Front and Rear A/C | 190 | 6.42 |
| A/C Condenser | 30 | 1 |
| A/C Receiver/drier | 30 | 1 |
| Front A/C Evaporator | 60 | 2 |
| Rear A/C Evaporator | 30 | 1 |
| Compressor | Drain and measure the oil from the old A/C compressor. See COMPRESSOR, A/C - Oil Drain Procedure. |