There are many different kinds of pulleys under the hood of your Toyota that are all important components to maintain. You have idler pulleys, which are engine pulleys used for guiding and tensioning the different drive belts under the engine. Engine drive belts are looped and routed around different engine accessories that you have like your alternator, power steering, and water pump. Idler pulleys help provide a rotating point around your engine belts so that they can be routed properly. The majority of engine will use one idler pulley and one tensioner pulley. These pulleys will eventually wear out over time and need to be replaced. It's important that you check them often and ensure that they are in good condition. You might notice visible wear on the pulley in the form of score marks on the surface. You also might start to hear squealing coming from the engine belts. Pulleys wearing down can cause engine belts to squeal when they rub against the surface. Be sure to invest in high quality replacement pulleys for your Toyota. We have them here at OEM Genuine Parts.
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