Model: 1/2 ton pick-up
Engine Size: 5.7
Refrigerant Type: R134
Country of Origin: United States
On my 1990 Chevy truck the AC was converted to R134 about 6 years ago and I did have to add some freon about 2 years ago. This past winter the temp went down to about 7 degrees and my truck was outside and I noticed a small spot on the drive way and it was freon/oil and it appeared that it was coming from the connection at the rear of the compressor. It leaked out most of the freon/oil and will not turn on unless I put a jumper on the compressor. It worked good back before the cold weather. Can I just disconnect the compressor, install new o-rings, draw a vacuum and install more freon? Seeing that I do not know how much oil the compressor has in it could I drain the oil and add back the correct amount? Thanks, BG
The short answer is Yes. You can do that.
There's no way to tell how much oil has escaped, however.
I would add 2 oz of BVA-100 Ester oil into the vacuum as a safety measure. That's assuming Ester oil was used for the R134a conversion.
If PAG-xxx oil was used, you would need to add 2oz of that oil. PAG oil is available in 3 viscosities that I know of, 46, 100 and 150. PAG-100 is common for GM systems.
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