The largest of these components is known as the V-ribbed drivebelt, which is situated at the front of the engine and is essential to both the running of the engine and to various accessories; this should be checked every now and again as it is thought to be prone to degeneration simply with time. The air conditioning compressor has its own belt on the 2003 and later V8 model years and the 2018 and later V6 model years The V6 model years also has a vacuum pump which also has its own belt. With the engine off, trace the drivebelt(s) in order to try to look for presence of cracks, separations, fuzzing, and glazing on both surfaces by twisting the belt. Make sure that the pulleys are free from nick and corrosion and inside the tensioner should be indexed properly. The thickness of the ribs on the underside of the belt should be of the same level. The tension for the alternator, power steering, and water pump is self-adjusted while the one used for an air conditioning compressor or vacuum pump is stretch allow. For replacement therefore, first, you ought to unscrew the air filter housing then for new models, the radiator support cover and the coolant recovery bottle and finally the fan shroud. Pay attention to where the drivebelt runs, attach a ratchet or a breaking bar to loosen the tension on the tensioner and pull the belt off like this. Taken the new drivebelt and fit it properly as required to the appropriate pulleys and make it to be set in its normal position before you release the tensioner. For the AC compressor drivebelt: first, loosed the accessory drivebelt and than cut off the old belt and than used the belt installation tool to fix the new belt. As for the vacuum pump drivebelt, the procedure is virtually the same: removal and, on the second step, installation of the new one, thus making sure it fits as it should. To replace the tensioner, the drivebelt has to be removed, the mounting bolts have to be unscrewed, and then the new tensioner put in its place and fastened.