Engine Size: 1.6
Refrigerant Type: r134a
Ambient Temp: 85
Hi, my ac system has currently PAG 46 oil in the compressor and a green dye that the ac shop pumped in when I had my last charge. I am planning to recharge the system and during evacuation process is the dye going to boil away or am I going to have to physically take the hose out and drain all of it? Can I leave the dye in there with no effect to ac performance? Should I change the PAG 46 oil too? I did a clean line and compressor flush with ac flush fluid a year ago and refill the correct amount of PAG 46 oil. The system is running fine with no leaks. Only reason I'm recharging it is because the first time I charged it I was careless and did not allow it to reach -29 pressure. I got it before to about -23ish. The ac is blowing cold but takes a while and on very warm to hot days it takes a long time. Regular days it will get down to to 46f vent temp. On long drives and tinkering with the fan speed I might be able to get it to 44F vent temp but nothing lower. Thanks in advance for any inputs.
Dye lives in the oil. It does not go away unless you flush and replace with new oil.
Oh? Should I flush it out and replace? If I leave it in there will it effect the performance of the AC?
You can leave the dye in there. It will not hinder the performance. Not pulling a good long vacuum to boil off any moisture will. Evacuate all of the freon, pull into a vacuum for a good 30 minute's and then recharge with the proper amount. No need to add oil as it does not boil out when placed in a vacuum.
Oh, Thank you very much for your input. This forum has such great quick reply times.
Okay, here is my store. I let out my old freon, used an AC vacuum pump to evacuate the system. I let the pump pull for about 5 min, let sit for 10 min. I then repeat until I see the low side gauge stayed at -29. I then pull for 10 more min. and let it sit for 30 min. I came back, nothing has changed. I then connect the yellow hose to a can tap, I bleed the yellow hose at the neck near the manifold, I slowly open the low side. Everything was going fine until when the first can was almost empty I notice freon was slightly leaking out from the neck of the yellow hose at the can tap end. I quickly tighten it.
Question now is, could this have let in air that my -29 pressure is pretty much gone and useless? I am currently getting a reading of 41F. I guess it's fine with me; I'll live, it gets the cabin pretty cool, but I was wondering could I have gotten it even colder if I never had that issue I mentioned. When doing auto AC what is a normal temperature OEM is at?
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