Hi all, I was wondering if someone out there with A/C system knowledge can give me some advice. The A/C system on my car has been "dry" for some time now (don't know how long) where as all the freon was out. I am assuming there is a leak somewhere. There was no hint of pressure at all when I was taking it apart. Here are my questions: 1. What should I suspect/check on my system that would go bad from it being dry for some time now? 2. Is the new "legal" freon as cold as the old stuff? I have only dealt with the older stuff so I can't compare the two. 3. Can I check for leaks in the system without charging it with freon? I know that there are special UV Dyes out there you can inject into the system and use a black light to track the leak. Can I use this without charging the system or do I have to charge it so I can run the A/C to find the leak? Any info would be appreciated, thanks. Steve