How much pressure on the low side of a 134 ac system suppose to hold? The gauges I have are r-12- r-22 gauges? Will that work or does anyone know? It's on an 01 lb7!
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R134
- Thread starter wikdlmm
- Start date
If you really need to check, go get you some R-134a gauges, cheap ones should be fine.
Dont want to cross contamitate things, even the smallest amounts of refigerant, or PAG and Ester oils.
All vehicles are a bit differant in pressures
Low side: 70ish High side: 180ish
Dont want to cross contamitate things, even the smallest amounts of refigerant, or PAG and Ester oils.
All vehicles are a bit differant in pressures
Low side: 70ish High side: 180ish
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on a 90* day
mine runs 60psi low side and 250psi high side. wiht 28oz/1.76lb of 134A
on a 60* im in the 40s low and ~200high side
i have hit 28*F coming out hte vents while going down the road.
i have seen 120psi on the low side when the system is OFF and the egine bay is heat soaked about 220*
operatiung between 40-70psi pending ambient temp.. hoter the day the higher the low side will be
:hug: Yup ambiant temps are gonna affect it too. I forget, these trucks are CCOT systems (cycling clutch, orifice tube) Im too used to BMW expansion valve systems, run a tad bit more psi.
If your having A/C issues, post up whats goin on and if you can high and low side pressures. Might be able to lead you to a fix.
Anyone wanting to see the max cooling temp, turn your blower fan on the lowest speed. the air goin through the evaporator has more time to loose its heat. And if your stationary, give the engine say 1000-1500 rpms.
If your having A/C issues, post up whats goin on and if you can high and low side pressures. Might be able to lead you to a fix.
Anyone wanting to see the max cooling temp, turn your blower fan on the lowest speed. the air goin through the evaporator has more time to loose its heat. And if your stationary, give the engine say 1000-1500 rpms.