Where is the pulley tensioner?
The tensioner pulley is on the end of a spring-loaded tensioner. The accessory drive belt rides on the pulley while the spring-loaded portion of the assembly puts tension on the accessory drive belt to keep it tight enough so that it doesn’t slip on the rest of the pulleys.
What does it sound like when a tensioner pulley is bad?
When the tensioner or tensioner pulley fails, the loss of tension can cause the belt and pulleys to make high-pitched rattling or chirping noises. If the pulley bearing completely fails, it can also cause a squealing or even a grinding noise. Symptom 2: Knocking or slapping. This can cause a slapping or knocking noise.
What happens when your tensioner pulley goes out?
If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started. It is also possible for the tensioner pulley or bearing to wear out, in which case the vehicle will produce a grinding noise from the pulley.
Is an idler pulley and tensioner pulley the same?
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.
Should tensioner be replaced with serpentine belt?
Tensioners add pressure from an adjustable pivot point or spring mechanism to keep your serpentine belt taut as it circulates around the engine. There is no recommended timeframe in which to replace your tensioner, especially as the belt itself usually needs replacing before the tensioner does.
What does a bad idler pulley look like?
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.