AC Pressure

[Unregistered]

Does anyone know the correct low side and high side pressure for a 1989 525I at 80 degrees F when the system is running?

Thanks

[Tiger]

89... R12 system... I believe 70PSI... and if R134, then 45PSI. Some please correct me if I am wrong. All you need to know is the low side. No point for high side unless something is wrong with your system.

[Bill R.]

For r12 at 80F and 20% relative humidity its
low side is 31
High side is 192 psi

80f 30% relative humidity
low side is 35
high side is 203

40% relative humidity
low side is 40
high side is 216

50% relative humidity
low side is 43
high side is 223

60%
low side is 49
high side is 230

70%
low side is 50
high side is 257

80%
low side is 53
high side is 263

90%
low side is 55
high side is 286

Does anyone know the correct low side and high side pressure for a 1989 525I at 80 degrees F when the system is running?

Thanks