Well the dryer is right there on the driver's side and comes out with I think only two bolts. I'm not sure what an expansion valve is, but I also don't know a whole lot about A/C systems, haha.
I can tell you from thermo that an expansion valve is something that decreases pressure while keeping constant enthalpy. Anyway, just a bump so hopefully someone else can explain how to remove the expansion valve.
The expansion valve is tucked away right next to the evaporator (inside the HVAC unit behind the glove box area). Ive replaced an evaporator before on a 3000GT many years ago when i worked for Mitsubishi as a tech, but i don't remember the specifics about it. I was able to do it without removing the dash. Good luck!
1992 3000GT VR4 (tastefully modified) & 1996 STEALTH RT/TT #47 (restoration work in progress)
20 to 30 psi on low side and 100 psi on the high side. I just replaced the compressor which did nothing to help so I'm going to replace the reciever and expansion valve next. I have only owned the car since November so I don't how long since it has worked. I am also using r134a. Thanks for the responce.
Just to let everyone know. I just changed out my expansion valve, dryer/receiver and dual pressure switch. And now I have cold air!!!
Changing out the expansion was not bad at all. Only had to remove the glove box, the plastic above the glove box, the lower plastic shield above the floorboard and the brace that holds the glove box in place. Unhooked the wires, removed three bolts and unhooked the high and low pressure line under the hood. The unit came right out. All I had to do was take apart the evaporator and change out the expansion valve.
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