belt tensioner going bad

How do I know if my belt tensioner is bad?

The symptoms of a loose serpentine belt include a loud squealing noise when the engine is started or when the steering is turned all the way to one side. A serpentine belt that keeps slipping off the pulley is another symptom of a bad tensioner.Nov 17, 2018

When should I replace my belt tensioner?

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.Sep 21, 2021

Is it safe to drive with a bad belt tensioner?

Driving with a bad belt tensioner is unsafe since the tensioner is meant to guarantee ample tension that powers accessories. Wear on the belt tensioner will eventually cause the belt to slip, generate loud noise, and also create an unsafe level of heat along the accessory pulleys.Jan 15, 2021

What would cause a tensioner to go bad?

Any damage to the automatic tensioner pulley can cause damage to the belt tensioner due to the vibrations caused by the pulley. Physical damage to the pulley is an indication of extreme tension or physical interference.

Why is my belt tensioner shaking?

Causes of Belt Tensioner Wobbling In general, belt tensioners tend to get noisy when they fail. If your belt tensioner is chirping or makes other noises, it is often an indication that the part is old and needs to be replaced. You can even remove the belt, spin each pulley, and listen for rumbling or other noises.Dec 15, 2020

How much does it cost to replace a belt tensioner?

To get the belt tensioner replaced, you will pay anywhere from $140 to almost $400. The price of parts and labor varies from one car to the next, with most labor costs coming in at about $70 or $80.

How long will a bad belt tensioner last?

How Long Does a Timing Belt Tensioner Last? Unlike the timing belt itself, the tensioner doesn’t necessarily have a manufacturer’s recommended change interval. In almost all cases, the timing belt tensioner should be replaced at the same time as the timing belt which is generally between 75,000 and 100,000 miles.

Is belt tensioner supposed to move?

The tensioner arm should move smoothly and freely. Solution: If you notice a binding, sticking or grinding tensioner arm, the tensioner should be replaced.

Can a bad tensioner cause engine vibration?

If you suspect you’re dealing with a failing tensioner or idler, you’ll want to watch for the following symptoms: … Excessive tensioner movement – Worn-out coil springs can also cause drive belt tensioners to loosen their grip on the drive belt, resulting in excessive vibration and rattling.Sep 4, 2020

Can a bad tensioner cause rough idle?

No, not really. Generally a bad timing belt will cause a no idle condition. As in the engine will not run at all. A bad timing belt tensioner might allow a cam to jump a cog and be out of time, but you only get to jump so many cogs before very bad things happen.

Is a tensioner pulley supposed to wobble?

If the tensioner pulley wobbles on its shaft, it means the interior shaft bearings have worn. This will cause a pulley misalignment. Bad bearings cause an audible growling noise. … An excessively wobbling pulley can throw the belt off, causing all the accessories to quit functioning.

Should a tensioner pulley bounce?

Absolutely you’ll see it bouncing slightly. The reason is, the belt will stretch and contract slightly as the engine speeds up/slows down. The tensioner provides two different functions: Provides tension to keep the serpentine belt tight during operation.Feb 14, 2019

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