I have a Astra G (2004 on a 53 plate). When travelling on a mildly bumper road I can hear a knocking sound coming from the nearside front wheel area - it doesn't do it on flat roads. BUT I can make the knocking sound on a flat, smooth road if I turn the steering wheel left and right causing the car to lurch one way then the other (at low speed obviously. I wouldn't want to do that at high speed)
The car doesn't pull to one side under heavy braking or acceleration.
I can't feel vibration through the steering wheel when braking at high speed - in fact I can't 'feel' this knocking through the wheel at all.
There is no knocking sound when turning in either direction with full steering lock on.
There is no heavy uneven tyre wear on either front wheel.
I'm no expert and with my own limited knowledge have come to the conclusion that it could possibly be the anti roll bar link rod. Neither rod appears broken, so it would have to be wear and tear.
What do you think? Is there any easy method to test my theory? Is this an easy DIY job? Or is it worth just taking the car to a garage so I don't replace the rods and find the noise is still there?
Any help would be appreciated.