Can I put new 134a into an OLD AC system

tomcatMember

My AC worked when I bought my 1973 Pantera in 1986 (not a typo).

I did not use my 1973 air conditioner in San Diego and slowly but surely it leaked out. Now, in the Southeast and in 2019, I want to see if I can get the compressor to kick on and work (blow cold air). I was thinking of just changing/adapting the low pressure port to a 134a port and using a few cans of 134a to pressurize (and troubleshoot for leaks).

I know the old freon oil and new 134a oils are incompatible BUT figured there was not enough of the old oil to make a difference.

Any thoughts/recommendations?

4/29/1912:11 PM

Original Post

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