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There doesn’t seem to be much of a straight answer out there for our cars when it comes to servicing a working system.
BMW gives you information on the amount of R134a/oil if you vacuum and fill an entire system but no low and high line pressure. And obviously no vent temperature relative to outside temp and humidity. The “standard” charts online are all over the place.
I’m servicing two E9x, a 2012 E91 and a 2008 E92. Both cool just not enough.
E91
I was getting this yesterday after adding 6oz
29-30 low
230 high
About 46-47F out the vents
81 ambient 73% humidity
Will be working on that again today (at 90F) but wanted to hear what pressures you guys have gotten and your vent temps relative to ambient. Thanks
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Airplane Mechanic
BMW Masochist
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