Having a few issues with a Squeaky belt or pulley. I have tightened the belt and it all seems to be in good state of repair, but the squeak just keeps coming back. A bit of silicon spray stops it for a while, but it is always back the next day.
It was an any RPM thing, now having tightened it it is only under 1500RPM and idle.
Would it be a pulley bearing, and if so what is the best way to determine which pulley it is?