I drive through Detroit and see Palm Readers and Psychics Signs and they say they can predict the future. If I go to a Palm Reader or Psychic, can they predict all the lottery numbers? They charge from $10 to $400 american currency.
If it is worn past the government safety regulations, it is not serviceable. If it is worn below specifications, it has to be replaced with a new rotor. This has nothing to do with it being a Cobalt. I service Cobalts.