Should I replace the tensioner or just the pulley?
If the pulley is damaged, replace the tensioner assembly not just the pulley. If an idler pulley is damaged, inspect the tensioner also because vibrations caused by a bad idler pulley may damage the tensioner.
When should I replace my tensioner pulley?
When to Replace Your Belt Tensioner You should expect to replace your belt tensioner in the 40,000-70,000 mile range. It is also customary to swap more than one part simultaneously, usually a worn-out pulley from other systems and even the serpentine belt itself.
Is an idler pulley the same as a tensioner?
The primary distinction between tensioners and idler pulleys is the presence of an adjustable bolt. Tensioners are positioned on the bolt through mounting. Idler pulleys are not mounted to an adjustable bolt. However, if bearings fail, tensioner and idler pulleys both require replacement.
What happens when the idler pulley goes out?
This wear reduces tension which can lead to belt slippage. Even more noticeable is a cracked or damaged pulley or bearing. This damage interferes with the rotation of the belt causing torn belts, or the belt falling off of the engine. Without a belt, stalling and overheating of the engine become commonplace.
How do you test an idler pulley?
https://www.youtube.com/watch?v=ppb9eQTGKdY
What does an idler pulley sound like when it's going out?
Excessively Loose Idler Pulley The loose pulley can make chattering noises as it spins and the vibration can knock the serpentine belt off. A loose pulley can also mean its bearings are bad. A normal pulley in good condition will only move slightly.Jan 6, 2021
How do I know if my idler tensioner is bad?
One of the most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.
What happens when an idler pulley goes bad?
Visual Clues of a Worn Idler Pulley Such wear decreases tension that can cause significant belt slippage. If the pulley or bearing is noticeably damaged, cracking, breaking, seizing, or otherwise coming apart, it is an indication that it requires prompt replacement.