I work in an automotive shop as a tire technician part time to put myself through school. how much risk do I face for developing a lung disorder? I don't personally service brakes; I only replace tires. This does expose me to some dust when I remove the wheel from the car or truck, although I try to avoid breathing it in.
Also, are macrophages and other leukocytes unable to carry out phagocytosis on asbestos fibers?
Ok, unless they are organic brakes, you will always have the chance of getting some diseases, I worked in a auto repair shop a long time, what did I get, well for starters, Asthma a lung disorder, A skin disorder, all from brake dust, brake fluid, carburetor spray, throttle-body spray, c02 carbon monoxide, Gas odors.
Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles, or they have been exposed to asbestos dust and fibre in other ways. you can learn more from videos of this site:
http://www.victimsofmesothelioma.net about your specific question.
How does asbestos causes mesothelioma?
Posted in 
it could be only brake dust. try spraying them down with brake cleaner and see if the noise quits.