Hi
I need to detect a leak in my cars empty A/C system. It's a 1992 300TE and has never been converted to R134a. I got new R12 but do not want to charge into a leaking system. I read about the method of using 5% R22 and then pressurize with nitrogen.
It looks to me that for a DIYer it may not be economic to purchase the necessary equipment to add the pressurized nitrogen. So I wonder, why not using just R22 alone, without the nitrogen?
Would this make sense, technically and legally?
Many thanks, Bruno

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1992 300TE 160 kmiles