Engine Size: 2.0l
Refrigerant Type: R12
A person who is going to regas my aircon said he doesn't add oil unless I have had the compressor overhauled before the regas. He says the old oil would still be there in the compressors sump.
Now I'm wondering
1. Since he is going to use a vacuum pump to evac the system, wouldn't most of the oil be sucked out, requiring new oil to be put in anyway?
2. Does my compressor even have a sump? This is the first time I hear of him mentioning compressor sumps. I have a Nippon Denso 10PA Compressor from a Toyota, similar to this one :
So I don't know whether it's safe to let him just put gas in the system, because my thinking tells me during the evacuation proccess most of the oil would be removed.
Refrigerant oil does not evaporate. The refrigerant can be removed as a gas (slowly) and it will leave all the oil behind. The system can be pulled into deep vacuum and it will not remove the oil. The oil circulates and migrates with the refrigerant, and upon shutdown is distributed (laying) all thru the system regardless of the compressors design (sump or no sump).
Slow leaks can push some oil out, and rapid recovery machines that pull liquid can bring out some oil; but usually very little. If you have replaced any components, this will remove the amount of oil that was laying in that part. Issues such as this would require adding back some oil to compensate for the loss.
What is the reason for re-gassing the system? Do you have a leak? If so the leak must be fixed prior to a re-charge. Catastrophic failures are caused by lack of oil and with a leak that can seep out oil, over time you will end up with compressor failure. So fix the leak first prior to a recharge.
I had leaks in 5 different places, one was from the EPR valve and would leak quite a lot of oil out.
I have since replaced the low pressure hose and the EPR Valve, Reciever/drier, Evaporator,
The only component in my A/C System that would still have some oil left in it would be the condenser.
and maybe some in the high pressure side line going from the condensor to the TXV Valve.
I would say 150ml's of oil should be added back, what do you guys recon?
Prior to evacuation and charging, you may as well flush the condenser or replace it and start off with a new system with the proper amount of oil. Not familiar with this application model but adding in the proper amount of oil and R-12 you should be good for a long time.
We've updated our forums!
Click here to visit the new forum
Copyright © 2016 Arizona Mobile Air Inc.