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Help with charging pressures

dhaz0221 on Sat August 23, 2008 5:39 PM User is offline

Year: 1990
Make: BMW
Model: 325ic
Engine Size: 2.5
Refrigerant Type: R12
Ambient Temp: 100-105
Pressure Low: 40
Pressure High: 300-350

I am having problems with pressures after recharge. I just recently replaced the condenser. dryer, and two hoses (compresser is two years old). After replacing all components I pulled a vacuum for two hours, shut off pump and let it sit for two days. Had no decrease in vacuum so went ahead and charged with R12 to exact manufactures amount. As you can see I am getting really high pressures on the high side and not so great on the low side. This is a 1500 rpms. At true idle the pressures are 45 and 250-300. To me this seeems like an overcharge but I put in the exact amount plus the correct amount of oil. The low side line is sweating ALOT which I thought was good. I am getting very good vent temps. The only thing I can think of is that the aftermarket condenser has a smaller capacity and thus would mean I am overcharged. Also the hoses I bought were slighty shorter and different shaped but still fit. I am hoping to have low pressures especially on the low side down around 30 or so. Let me know what you think.

dhaz0221 on Sat August 23, 2008 5:41 PM User is offline

oops I mean I am NOT getting good vent temps from the post above.

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