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What are idler pulleys?

In: American Cars, European Cars, Serpentine Belts, Pulleys [Edit categories]

Answer:

An idler pulley is not only a tensioner it is also a guide pulley on long stretches of belts and chains that helps them from coming off the main pulleys it also helps with vibration

it is a free pulley that works as a tensioner on any belt bolted to hold or spring loaded

An idler pulley usually tensions a belt.. eg supercharger belt is kept taut by its respective idler pulley

First answer by Pjay. Last edit by Chewd. Contributor trust: 242 [recommend contributor ]. Question popularity: 53 [recommend question].

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Where is pulley is the idler pulley?
it's an alone pulley mostly found bulted to engine block. the belt can run under or over it
How do you dislodge a stuck idler pulley?
well I pulled and pulled and it snapped today
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Idler pulley broke off?
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What are the symptoms of a defective idler pulley?
Lots of noise or the belt jumping off.