1. The bearing is in the compressor pulley itself. There is a pulley removal tool at all air con shops.

2. Always have my aircon serviced at Exalta in Banawe. Cheap labor, complete tools and decent service.

3. The bearing is located in the outer part of the compressor.

4. Eventually it will. The noise will get worse.

While you're at it, if you haven't had your AC cleaned, might be a good time to do so. Replace the expansion valve and drier. And install an AC filter if your car has a provision for it.