legally, you need to get the refrigerant vacuumed out by a certified tech and recycled whether you have R12 or R134 or anything else. but then I have no idea where you are or anything :-p
nitrogen purge is a waste since you're just emptying the system, the refrigerant will boil off on it's own at room temp/pressure.
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-Russell
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"
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