hi guys, im new to the site and 2 weeks ago brought an R Reg ST24 just to get me to and from work, everything looks great, it had a fullservice in april ( got a service history) and MOT till may 2011, the engine sounded great but the past few days im getting a whirring noise from the drivers side (stays constant no increase or decrease in sound), ive got no loss of power, electrics are fine, no oil leaks, and no loss of water - should i be worried about it???? thanks