I'm after some advice if possible, my 2006 Mk5 Astra has started making an 'electric whirring' kind of noise from the engine and I have no idea why or what is making it.
The noise increase's in pitch & volume as the revs increase, both on the move and when stationary just revving the engine.
I've searched t'internet a little, and there have been suggestions of crankshaft pulleys needing replacing to knackered alternators.
I'm not mechanically minded, but I'd like to know what it could be before I get it looked at so I know if I'm being ripped off or not.
Any help or advice would be greatly appreciated.