I found that if you have one of the GX cs4 models... they tend to have an air pocket at the top of the radiator. A simple tilting and refilling when first getting the compressor set up will remove it and drastically drop water temperatures with some of the compressors.
I run my GX cs4-i often for over an hour and this helped a lot.
If you have one of these compressors, give this a try! You do not need to take the cover off as in the video.
@trucker3573 yes, that's all there is to it.
Tilt and run for 30 seconds or so.
A few people have had to repeat the process a couple times, but once it no longer needs coolant added... you're good to go. You'll only need to do this process one time to get the air out, after that, your system is totally blead out and will run much cooler.
@trucker3573 I like to take the cover off so I can see the air bubbles going thru the various tubes while tilting. Once I dont see any air bubbles being dislodged and running thru the tubes then I feel like I'm done with it.