A spring-loaded one for the serpentine belt and an adjustment bolt for the AC belt.
July, 25, 2011 AT 9:41 PM
Where is the adjustment bolt located?
July, 26, 2011 AT 2:13 AM
The bolt for the AC belt sticks up in front of the idler pulley. Turn it counterclockwise about ten turns. Next, loosen the lock nut at the center of that pulley and it will slide down about a half inch. That's enough to pull the belt off. When you reinstall it, tighten the bolt to draw the pulley up, then tighten the lock nut.