orifice tube

[87 Chevyrado]

I didn't find much info on the air conditioning orifice tubes, especially for our trucks. I also could find zero pictures of the locations for the orifice tube so Here's a pic for everybody who wants to know where it's located and how to get to it...


On the high pressure line coming off the evporator about 5 or 6 inches from the box and right near the high-pressure port you take the fitting there loose and the orifice tube is right inside. Just grab it with some needle-nose pliers and twist gently and pull and it'll pop right out, then just push the new one in it's place and you're done. You will need a new o-ring for the connection that has to be opened. I bought a complete A/C o-ring kit from advance for $4 or so.

[modular93fox]

one thing to note is the direction of the orfice, it is directional, and its easy to tell which way it goes, it has an arrow on it. it goes in the direction of refrigerant flow, and in our trucks case, it points towards the EVAP.
clint

[81hvychvy]

If you haven't already replaced it, I just want to say that it is easy a all get out.

I replaced mine and well as the drier when I converted to R-134... But make sure you take it to a certified A/C person to have a vac put on it to make sure there are no leaks. I put a 20 minute vac on mine and thought all was well, but the refrigerant slowly leaked out.

But I work at a dealership and all those tools are around all the time.

That was when I had the straight six in there, with the 350 I couldn't use the same compressor or lines so I'm kinda S.O.L. until I find or buy a good compressor, brackets, and lines...

Tulsa sucks without A/C, makes me wonder how I survived in alabama all those years without it!