Here's the belt tensioner in question from the parts list:
Item 7 is probably what's causing the screech - a word tensioner pulley bearing. I'd recommend replacing both this and the tensioner piston, item 15, at the same time.
Removal is simple. Jack the front of the car and remove the lower splash shield (4 bolts). The tensioner is to the left and slightly above/alongside the alternator. Release the tension by unscrewing the larger of the two bolts on the top bracket of the tensioner. Here's a pic:
Once released, you can remove these two nuts and a single bolt below and the entire assembly will come free. Replacement is the same, but you need to retension the belt by placing an open end on the larger of the two top nuts and turning to the left. At the same time, tighten the lower lock nut. Here's another picture:
The same procedure applies for the A/C belt tensioner on the other side, except the pulley assembly is upside down with respect to the alternator version.
Mark
