Engine Size: 7.3
Refrigerant Type: 134a
Country of Origin: United States
I know I've seen recommended mineral spirits, carb cleaner etc. At work we use a lot of acetone and it removes water and oils and has a fairly low boiling point so it evaporates quickly. I used the Safe Flush from AMA to get the old oil out, but since my compressed air has moisture in it I thought about using acetone to dry things out before I assemble the parts. I planned on flushing some acetone and letting it dry for a day so the acetone would evaporate and leave residue free parts. Thoughts?
Acetone is very flammable but will clean things well. Personally I would not use it because of the dangers.
So flammability is the main concern? I can understand that, but I've been using it at work for 13 years now so I'm accustomed to working with it.
As I'm sure you're aware, acetone strongly attacks many kinds of plastic, rubber, and paint. If you 're fluhsing only metal parts it'll be fine.
You could get set up with a tank of nitrogen and a regulator. Use that for the final blow-out of flush to avoid water problems. Dry nitrogen is also useful to put a system under pressure for leak testing.
The problem is getting nitrogen and a regulator. For the average DIY it's not too easy.
A quality filter/separator for your air line should remove the moisture and compressor oils found in your air supply. This is a good practice to protect many if not all of your air tools.
I used acetone once on metal parts and it worked really well. I thought I'd finally found the ultimate flush.....but..... the residual vapors played absolute hell with my vacuum pump - I considered myself very fortunate that changing the pump oil twice was all that was required (as opposed to overhauling my vacuum pump).
That's without even cosidering what residual vapors would do to the A/C system itself....
I wouldn't recommend it. It is a wonderful cleaner for metal parts but the vapors are absolutely killer on everything else....
Best & Thanks;
At 100 degrees for 4 days I do not have to worry about residual. The acetone will evaporate at this temp. I was trying to mainly get out the old oil and clean the evap, it served it's purpose.
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