In the front of the engine, drivebelts are placed and it is extremely important for them to be in good condition as well as properly adjusted so that they can function accordingly. Since drive belts stretch and wear out over time, regular examination becomes necessary. The power steering pump, alternator, and air conditioning compressor have separate belts on 2006 V6 engines and older 3.5L ones, while on four-cylinder models or most others A single belt powers all accessories. Use a flashlight with the hood open to visually inspect for separation, cracks, fraying edges, glazed surfaces or worn ribs. If any of these symptoms exist then replace the belt right away. Check the tension by pushing down at about midway between pulleys; it should give about one-quarter inch deflection each way. Make sure you finish this off by tightening up your pulley nut firmly when you have achieved proper tensioning. Remove any other parts that impede belt removals and relieve tension from them if necessary while changing belts. Take old belts to store for comparison; verify new belts will fit in pulley grooves correctly; Always change both belts simultaneously whenever possible . Follow earlier procedures to adjust belt(s). When a self-adjusting tensioner exceeds its maximum length for expansion (stretched), throw it out and get another one of these types from anywhere else apart from replacement items that are cheaper yet effective than original equipment manufacturer stuff obtained through costly dealer supplies.