2001 Polo problem
 

Hi Guys.
My 2001 polo has for a while been making a knocking noise it would seem from the front i have fitted new struts and top mounts the knock went away but returned a month later ( a new problem) i took it into a garage and they could not find the fault i removed the struts and checked they are fitted right they are but still it knocks . With the front jacked clear of the ground i turn the steering wheel from one lock to the other no knock spin the wheels no noise. Anybody got any idea what to do next.
John