How to Add Refrigerant Oil to a Car?
2 Answers
The method for adding refrigerant oil to a car is: 1. Connect the red and blue hoses of the air conditioning high and low pressure pipes to the corresponding hoses on the air conditioning pressure gauge device; 2. Attach the yellow hose from the device to the vacuum machine for evacuation; 3. Turn off the vacuum machine, remove the high-pressure hose, and add the appropriate amount of refrigerant oil through the compressor service port as needed. The methods for checking the refrigerant oil level are: 1. Observe the sight glass to check the refrigerant oil level. It is appropriate when the compressor refrigerant oil level reaches 80% of the height of the sight glass; 2. Observe the oil dipstick to check the refrigerant oil level. The oil level should be between the upper and lower marks on the dipstick.
I've worked with refrigerant oil before when repairing cars. This stuff is used to lubricate the A/C compressor, but you gotta be careful adding it yourself. First, check that the A/C lines aren't leaking, or you're just wasting your time. Then buy a vacuum pump, connect it to the system, and evacuate for 30 minutes to remove moisture and air. Next, use a special oil injection gun to add the refrigerant oil - the amount must follow the vehicle manual, or you'll kill the compressor if overfilled. Finally, recharge with refrigerant and test cooling. The tools alone cost a few hundred bucks, and one wrong step can trash the whole system. I'd advise beginners not to attempt this - just take it to a professional shop. Regular A/C checks to prevent oil leaks are what really matters.
