my a/c compressor makes a lot of noise when the car is idling. it sounds really nasty kinda like something like a plastic wrapper is caught in the fan. does the compressor have a bearing that could be going bad or what? also something else that doesn't seem to have any connection to the compressor but a antifreeze smell comes out through my vents when i turn the a/c up or turn it off. there isn't any sign of leaking and the antifreeze level never drops. please help!! sleepin--