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ive got a 30lb cylinder of the r12..but like everyone else said its cheaper to just convert to the new stuff..last time i could find a 30lb cylinder to buy it cost about 900 bucks..typical empty car system take just under 3lbs.. my dad is a licensed refigeration tech..he has extensive experience with retrofit products like freeze 12 and from what he has explained to me using too much of it in a system can cause the head pressure to jump way up and the system will just shut down
to properly convert your car you should drain the system completly get a new accumluator and oriface from GM.. get about 6oz of oil and 3lb of the 134a...after the conversion i noticed no difference between the 12 and 134.. although if you measure the temp coming out of the vent r12 runs about 40 degrees and r134 will only get down to 50..
if it just needs a charge just find a shop that has it..i have no idea what it would cost..
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