If a system has received refrigerant + oil charges over time and will no longer take a full refrigerant charge because of the accumulation of oil in the system, how to you remove the oil? Will a vacuum pump remove any of this as it takes the gas out of the lines?
-Inet
You can remove the compressor and drain it, then flush the AC lines, etc.
You have to do this when you convert a "black death" failure from R12 to the newest refrigerant.
A vacuum pump wont do it, alone.
What is involved in flushing the lines once the compressor is removed? Do you need special equipment to do this, or is it something you could do in your garage (home garage)?
Pull the compressor and drier and orifice tube or any mufflers. Connect a hose to one end and put it into a container to catch the oil/flush fluid. Connect the other end to an air powered siphon nozzle, connect up to CLEAN FILTERED pressurized air, OR use nitrogen. Then stick the siphon into a container of mineral spirits, or something like Dura 141. or buy something like these.
Steve W. already answered it rather well. You dont really have to have a lot of special equipment.
I converted the R12 on my 90 Reatta to R134A not so long ago. It was really dirty. I had to change out the compressor in any case since the old GM pos was leaking.
There was a lot of black death in that one.
I bought my new parts from
Dont waste time - if you arent going to do it right, save your time and money.
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