#indiasbestdealers #bestoffersindia #Qualityproducts #trustedseller #bestoffersindia #ontimeservice #RoadSafetyFirst #specialoffers #savewater #planttreessavelives #DrugFreeIndia #Tensioner bearing (Idler bearing at tight side) There are various styles according to engine types. Functions · To provide belt with tension · To transfer driving force from crankshaft · To prevent belt slippage · To prevent noise caused by off-line belt · To minimize space of belt layout Tensioners apply the correct amount of tension to the timing belt to ensure a synchronous drive. They play a vital role in the engine: if the tensioners fail, the engine can fail too. Tensioners allow the timing belt to move smoothly through the engine, powering various components. That is the big long belt in the front of your engine. The tensioner rides on the outside surface of the belt to put pressure, or tension, on the belt and against the pulleys that drive things like the alternator, power steering, air conditioner, etc If you have a bad spring or hydraulic drive belt tensioner, it is not repairable. It will need to be replaced with a new one If any tensioner pulley begins to wear out with time, it'll create more of a chirping noise. You'll also hear the chirping noise if the pulley grooves are damaged. This happens over the years due to friction, leading to cracks in the belt. The Average Cost to Replace your Car's Drive Belt Tensioner is Between $235 and $267, Depending on Whether You Go to the Mechanic or DIY. This price range is based on national averages for all vehicles and does not factor in taxes, fees, or your particular make and model.