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What is Tensioner Idler Pulley?

A tensioner idler pulley is a type of pulley that is used to keep a belt tight. It is typically used in automotive applications, such as in the serpentine belt system. The tensioner idler pulley has a bearing that allows it to rotate freely, and it has a spring that applies tension to the belt. This keeps the belt tight and prevents it from slipping.

The tensioner idler pulley is an important part of the serpentine belt system. It helps to ensure that the belt is always tight, which is essential for proper belt operation. If the belt is not tight, it can slip, damaging the engine.

The tensioner idler pulley is a relatively simple component, but it is an important one. It is a good idea to have it inspected regularly and replaced if it is damaged.