99 GTP 3.8 Supercharged.
Bought a salvage compressor, gauges, vacuum pump, pag oil with uv dye, new seal kit. Vacuumed the system down, found a leak on the high side port, replaced it and the low side valves (that high side was a ***** to get out, I thought I had to hold the bottom nut and turn the top nut and nearly twisted the damn line off before I figured out just the top part unscrews) and revacuumed.
Didn't see any leakage on the gauges. High side did continue to "suck" after the high side gauge line was taken off. I could put my finger on it and the vacuum would grab my finger. Thought that seemed odd but didn't notice a leak on the gauges so I proceeded to add freon.
It took nearly the whole first can before the ac compressor even kicked on. I was using one of those blue/green/yellow/red gauges you get from the retrofit kits at the parts store because I didn't have a can tap for the manifold gauges yet. Took the whole can and let it run for a bit, was still in the green.
Decided I should go get a can tap, came back and added the second can. Added half a 3rd can, vent temperature inside the car with windows down and ac on max was about 66F with an outside temperature of 95-100F. PSI readings were 40-50 low side (mostly 45-50) and 250-300 high side (mostly 250). Let it run for a bit psi stayed around those numbers.
Vent temp never dropped below 66F. I haven't actually driven the car because I've still got to replace the oil pan gasket and just got the valve covers done today, and I know going down the road the ac works differently than just sitting there, so I don't know if the vent temp will drop, but its higher than the 45 to 55 temp everyone says it should be. Since I'm pretty far up the low side pressure I'm hesitant to add anymore freon. Is the low side too high? Is the high side too low?
Originally Posted by Fivefingerdeathpunch
