Thanks for the reply Mike. My plan is to replace the compressor, receiver/drier, etc and then take it to a shop and have it checked over/recharged there. Based on the recommendation of a friend who replaced his compressor and then charged it himself only to have the compressor fail after one season. Second compressor he took to a shop and so far so good. Jeff Stewart ----- Original Message -----
> On 7/8/2012 10:14 PM, J Stewart wrote:> Then, if that is true, the
> compressor Bus Depot just sold me as
> > compatible with either R12 or R134A isn't-the label on it says
> > "mineral
> > oil" I'm still confused here and don't want to ruin an expensive
> > part!
> I think you want to empty any oil that's inside, and preferably flush
> it. AC flush should be available at your FLAPS. Since your system was
> upgraded, it probably uses ester oil, so you'll need to put some of
> that
> in (Ester is compatible with both mineral oil and PAG, and compatible
> with both R12 and R134a, so it's the "universal" choice). The Bentley
> should say how much sits in the compressor.
> The new compressor should have come with the right amount of oil, so
> you
> could theoretically measure what comes out. But that assumes it was
> properly filled, didn't lose any during its obviously long storage,
> you
> can drain almost all of it, and there's not a large amount which comes
> out with the flush.