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Old 02-17-2013, 12:08 PM
rdl rdl is online now
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Location: Ontario, Canada
Join Date: Jun 2010
Posts: 1,767
Mein Auto: 530i 2003
Originally Posted by Steve530 View Post
What should the high pressure be?
A/C system pressures depend on refrigerant, ambient temperature and relative humidity as well as the specific car.
I've never seen BMW &/or E39 values. However I've attached data for a Cadillac Catera which has a similar system, i.e. R134a, variable displacement compressor and TXV (rather than fixed displacement and fixed orifice) These values will at least get you in the ballpark.

Come to think if it, is the phrase "in the ballpark" understood &/or common in Oz? Just idle curiosity.

BTW, I'd like to trade. Temperature here this afternoon is 12 F, last night -5 F. Some hot air would be quite nice for a change.
Attached Files
File Type: pdf AC_R134a_Values.pdf (90.3 KB, 65 views)
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