Engine Size: 2.5 L
Refrigerant Type: R-12
I'm shopping for a new expansion valve for the above vehicle and am finding quite a price spread. I haven't removed the old valve yet and I'm hoping it will have a part number to cross reference. In photos of the valve from various sites some show it with just a coil and others (like AC Kits) show it with a coil and a second tube with compression fitting. I'll soon find out which one I have but is the 31-10931 a commonly used valve (and is it OK with R-12 and 134)? The AC evap unit in these cars (before mid-85 configuration change) is a bolt in Nippondenso unit which is not integrated with the heating system. I also can't seem to find the factory specs for the valve as far as overheat, etc. Is there a site where such info can be looked up?
The original expansion valve part number is 047500-0320. Also printed on the diaphragm housing is ND 8D03. I assume the ND is for Nippondenso but I can't find any cross reference to this number. The valve only has the capillary (coil tube), not the other one with the nut on the end like AC Kits 31-10931. Can this other tube be snipped off without causing problems?
Also, the coil part was wrapped to the evap outlet tube with a sheet of cork and glued with a tar-like substance. I assume it is important to keep the coil tight up against the evap tube and insulated. Is there a modern-day substitute for the cork?
Post an image of the valve you have.
Sorry about the over-sized photo.. I think I found the answer to my question about 1 tube vs. two. For the valves that have 2 tubes coming off them, one is an external equalization tube. A valve like mine is internally equalized (to the pressure in the evap). I would assume you can't simply lop off the extra tube to convert the external to internal. So I guess the question is for the 31-10931 which is specified for the '84 944 a one or two tube design?
You need 31-10912, image on our site is poor. I'll have it updated in the morning.
Most valves produced today work that way. Even older valves will work with both as your reading the superheat to control valve function.
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