Generally speaking, if its a wheel bearing, you should be able to ascertain which side is faulty when driving by loading one side at a time i.e. going round a bend.
If you steer right it puts load (weight of the car) onto the left side. If the noise increases whilst steering right then the fault is on the left side. Conversely, if the noise goes away when steering right then the fault is on the right.
I've also seen instances when driving straight ahead even slight - and I do mean slight - movements of the steering wheel can induce said whine and give easy diagnosis.
You then need to find out if its the front or the back.
Jack up one corner and secure on stands. Hold road wheel at 6/12 oclock position and rock assembly gently in and out. By that I mean push with one hand and pull with the other. You are feeling for any possible play in the bearing and movements are minimal.
Try the same whilst holding at the 3/9 oclock position and repeat.
If free movement is felt then get someone to sit in the car and apply the footbrake and keep it applied whilst you repeat the test above.
If the movement disappears when brake applied then its a faulty wheel bearing. If its still there its a fault in the suspension bushings.
Hope that helps a bit.
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Topic: Whining Noise (Read 1099 times)