Belt tension is maintained by an automatic tensioner. No adjustments are necessary or possible.
Drive Belt Routings
Fig. Accessory serpentine belt routing-3.5L engines
Fig. Accessory belt routing-Crankshaft pulley (1), alternator (2), P/S pump (3), water pump and cooling fan pulley (4), idler pulley (5), tension pulley (6), A/C compressor (7) and drive belt (8)
Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately.
Removal & Installation
Disconnect the negative battery cable.
Remove any necessary engine covers that are blocking access to the drive belt.
Use a wrench to rotate the drive belt tensioner, as shown in the accompanying figure, to remove drive belt.
Installation is the reverse of the removal procedure.
Fig. Accessory serpentine belt removal and installation