HI I have a 91' Accord and want to fix the ac. Last year I recharged it and it cooled ok. But it leaked out in 2-3 days so I left it alone until now. Im thinking about replacing the o-rings, at least all the ones I can get to. How much would it cost to have it leak tested afterwards? I mean couldn't they just pull a vacuum and see if it holds?

 

I just found out I know someone with a vacuum pump and gauges. So im going to replace o-rings, reciever drier, and drain the oil out of the compressor and refill. anything else I should do, and what kind of compressor oil should I use?