Good morning,
The vehicle is a '91 LS400. The AC is low, the site glass shows almost no fluid. The pressure is high enough to allow the compressor to run.
My question is: What is the Schrader valve fitting?
R12 systems (and I believe r134a) have the fitting threads on the outside of the valve stem, like a normal tire, etc. The fitting on this system are on the inside of the valve stem. I have not seen this type of fitting before. What is it? What does it imply as to the coolent?
Thanks - Dan