Hi,
I have a little x reg vauxhall corsa 1.2, and recently its started sounding like a helicopter, particularly when doing about 45-60mph and u can hear it v.clearly when breaking as the noise slows down, its literally that whoom whoom whoom whoom sound that a helicopter makes, just not so fast or loud (its just louder than the engine noise itself), and it varies with speed, although not with revs. For example, if i dip the clutch its still there, its nothing to do with the tyres though, and yes there is enough oil in the car, it only had a vauxhall service a few months ago althogh i wouldnt trust them to change a lightbulb; i even looked under the car to see if there was anything physical stuck on the axle or something that could be rotating creating the noise. Any help would be much appreciated. Ive got a haynes manual, so im prepared to have a bit of a poke around with things if anyone has any ideas!
Thanks, John