knocking noise when i steer any thoughts and sqealing

[imotec]

Hi i have a golf mk4 gt tdi i owned it for around 6-8 months now and today i have this knocking noise. Heres what it is i went to go and pull out from a parked car as i put full lock on i felt this strange bumping sensation on the wheel and also aloud sqealing i have already replaced the belt 3 months ago im guessing this could be the steering pump on further inspection earlier could be the belt tensioner because i looked under the hood i seen metal shavings thinking this might be the bearings in the tensioner as it wouldn't be possible if it was the steering pump as the tensioner is higher up any thoughts cheers