Hi guys, need some advice..noticed yesterday when my mechanic was doing an oil change..that one of my radiator fan blades is making a sound when you move the blades manually with your hand..one blade moves smoothly when turning it but the other makes a heavy kinda sound when turning it..sounds like a bearing..Is there a bearing in the middle of our fan blades...sound isnt too loud when the fan is operating but one of them is alittle stiff when manually turning it...temp is normal..just alittle annoying..anyone had this prob before or know what it could be.my mechanic has gone on hol for 2 weeks so maybe i have 2 wait till he comes back to take a better look..any suggestion now would be appreciated...tks all