Engine Size: v6
Refrigerant Type: now R134a
Ambient Temp: 86
Country of Origin: United States
My 1990 300ZX was retro fitted to accept R134a refrigerant. Looking at the Nissan Online Service Manual it appears to suggest a low side pressure of 24 to 29 psi at 86 degrees ambient temps and a high side of 164 to 201 psi. But these readings were established when the system had R12.
Are the same readings appropriate for a system that is now running R134a? If not then what would be the correct readings at different temps for this car?
When it had R12, it was my understanding that the site glass should not show bubbles if fully charged.
Now that it is R134a, I see a greenish foaming when the compressor kicks in and then it eventually becomes clear in the site glass. Is that appropriate?
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