Hi everybody. Looking for some advice about my 2002 1.9 Tdi SE, PD100 engine (ATD I think) with aircon. It's concerning a squeaking noise which occurs on full lock and also just after a cold start. I thought it would be the alternator/power steering belt so I changed that and it seemed to go away but it's back.

Does this engine have alternator pulley problems or is it going to be a slack tensioner which needs replacing? The tesnioner is wobbling up and down when it's idling, as though the spring may be tired and not pushing as hard as it should. It's done 99,000 miles.

Any advice appreciated.