After replacing my receiver drier and having my condenser flushed out, my AC blows at a maximum 78/80 degrees on high fan and lowest setting.
Pressures measured with a manifold gauge set points to a partially stuck closed/open expansion valve which I think needs replacement.
I was trying to avoid this job because of how much labor is in involved with taking apart the whole dash but now it seems inevitable.

Now for those people that have done the evaporator/expansion valve replacement. Are there any shortcuts to make the job easier/quicker
(Would I be able to reach everything from behind the glovebox)?
If not, is there a write up anywhere I could study to help familiarize myself with everything?

You probably know, having written it this way...but make sure you are aware before pulling the dash apart that the valve is not a service item - comes with evap core attached and is Hella-spensive! Although that's not saying you can't find a suitable valve and effect a swap....

Yeah, I'm hoping it'll be easy to separate the two as I've read in another thread, which I can't find now that I have this problem, that the dealer is the only place that lists it as one piece

Rock Auto list its as one piece.

Please be careful, the rectangular expansion valve listed in Rockauto doesn't fit an X300.
That's for XJ40s.
The one fits X300 is Four Seasons 39000, which is really cheap.

From the pictures I'm seeing of it, it does look like it's replaceable apart from the evaporator. Hopefully that's the case since I can just replace the valve and get the evaporator flushed out.

But no one knows of a guide to removing the dash board correctly in order to get to the evaporator/valve assembly?

Rock Auto has the part (GPD Part # 3411483) and I bought one. ($12.58+shipping)
It is the correct part as it is identical to a good used part I saved from a leaking EVAP core. It is JUST THE EXPANSION VALVE!!!!!!!!!!!

I now have a good used valve and a NEW one so I am set for a while.

YES the entire dash assembly must be removed and THEN the climate control box can be removed and disassembled for repair.

If you have never done this repair I would suggest a digital camera or detailed drawings for harness connectors and correct routing.

bob gauff