I have a odd whiny noise that is bothering me coming from the pulleys. However four people at Toyota looked at it and tried to hear the noise and they didn't notice any strange sounds. It's bothering me though. How hard is it to take the pulley bearings off to clean and grease them? I've never done anything like that, only changed spark plugs, done exhaust mods, intakes and what not...nothing involving pulleys, what do you think?