Originally Posted by PatHenry

So does anybody know IF I have a liquid line on my 95 R134a system, given it's the "expansion valve/dryer" setup and if so, where it runs? The parts retailers DO list one for the 95 but I don't see it (or I'm failing to recognize it) when looking in the engine compartment. It states it runs from the evaporator to the condenser, so it should be from the firewall somewhere to the front of the radiator.

Another question, can anyone confirm that if the lines look like threaded fittings that they definitely are? Assuming that they are all threaded (as it appears they are) can I (should I) use PBBlaster if necessary? What about heat?

Sorry for my ignorance. Once I know the answers to these questions, I think my plan will be to order a new R/D, Expansion valve block (since it's like $11 on RockAuto) and O-Ring kit and do the O-rings and new parts. Assuming I don't break any other parts in the process and that everything goes back together nicely - then I'll move on to purchasing the vacuum pump/gauges etc.

Someone mentioned that the pressure readings are not useful for my type of system and that I have to use the inspection port. As far as determining the proper amount of refrigerant, since my system is completely empty, I would just use the capacity spec (which someone mentioned is listed on the under-hood sticker), right? If this is the case, does that mean the gauge set is useless or not? I'm getting a bit ahead of myself, so I can burn that bridge when I get there.

Originally Posted by 4.3L XJ

Every one has a liquid line on an AC unit. In fact there are three. First is the small line off the compressor that goes to the condenser coil. From the coil, the second one goes from the coil to the accumulator. The third one goes from there to the evap coil. Where the schrader is is up for grabs. Some, like my original system had them on a king valves. Some will have them on the back of the compressor. Some will be in the hard parts of the lines

Originally Posted by 4.3L XJ

Every one has a liquid line on an AC unit. In fact there are three. First is the small line off the compressor that goes to the condenser coil. From the coil, the second one goes from the coil to the accumulator. The third one goes from there to the evap coil. Where the schrader is is up for grabs. Some, like my original system had them on a king valves. Some will have them on the back of the compressor. Some will be in the hard parts of the lines

Originally Posted by Bugout4x4

In reading this I realize it may be based on demographics. Some demographics require top notch skills others only require marginal skills. At the end of the day it depends on what that vent temp is in what ambient temp.

Originally Posted by 4.3L XJ

If you want to get it down to the gnat's eyebrow, you have to use superheat for a fixed orifice and subcooling for a TXV. But that is beyond the skill of most people unless you have access to humidity readings and tables for whatever refrigerant you are using. Suffice it to say, the gauge on the can sort of works and the sight glass works too