+1 on Highway Stars. Does it make noise when the clutch is engaged or only when the ac is off? The harbor freight gauges work fine. If you have an old refrigerator, you can remove the compressor and use it as a vacuum pump. the harbor freight pump is about 100 bucks. they also have a vacuum generator setup that uses compressed air if you have a decent compressor they work fine too. not hard to do, I put a few drops of dye in the system when I have it open, in case I ever get a leak down the road its easier to find. If the compressor blew apart internally, its recommended to replace compressor, accumulator, orifice tube and most likely the condenser when the system gets contaminated that badly. Check the orifice tube screen for debris to see how severe the contamination is. Additionally, flush components that are not replaced; evaporator and lines. If ac still blows cold hopefully its just the external clutch bearing. I just replaced the ac clutch bearing on a car (GM) I picked up cheap because it was so loud the seller thought the tranny was bad.