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.
Should I replace the tensioner when I replace the serpentine belt?
Chances are, you'll replace the serpentine belt at least once before you have to replace a tensioner. In most cases, you'll replace the belt several times before the tensioner. But every time you replace the belt, you should check the tensioner. A bad tensioner could ruin a brand new belt.
Should I replace the tensioner or just the pulley?
If the pulley is damaged, replace the tensioner assembly not just the pulley.
Do I need a tensioner or belt?
Usually a belt that has failed because of the tensioner will have to be replaced, along with the tensioner, in order to restore full functionality to the vehicle. A drive belt tensioner is an important component as it is what keeps the belt properly tensioned so that it can properly drive the vehicle's accessories.
Should I replace idler pulley and tensioner?
Alternatively, idlers spin with the overarching aim of moving belts to specific positions. However, if bearings fail, tensioner and idler pulleys both require replacement. If there is any odd noise such as a grinding or squealing sound or if either piece wobbles, it is a sign that replacement will be necessary.
17 related questions foundHow long does a 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.
Why does belt tensioner go bad?
The most common causes of timing belt tensioner failure include: Wear and tear: On a new mechanical timing belt tensioner system, the timing belt tensioner spring is wound tightly by two tension rods. Over time, the spring stretches out and loses its tension. As a result, the entire tensioner becomes too weak.
How much tension should a serpentine belt have?
The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more, the belt is loose, and if twisted less, the belt is too tight. Either of the positions does not work for the vehicle.
How much does it cost to replace a serpentine belt and tensioner?
The average cost for a drive belt tensioner replacement is between $211 and $239. Labor costs are between $73 and $93, while parts are priced between $138 and $146. Taxes and fees are not included in the estimate.
Why is my belt tensioner shaking?
Why Is My Belt Tensioner Shaking? Wobbling of Belt Tensioners When belt tensioners fail, they tend to get noisy. It is often an indication that the belt tensioner is worn out and needs to be replaced if it chirps or makes other noises.
Can I just replace the pulley on a belt tensioner?
More often than not, just the pulley goes bad on the tensioner, not the whole tensioner, and for most vehicles, you can purchase and replace the pulley instead of the tensioner itself. The pulley should be replaced if it has a lot of resistance when you spin it.
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.
How long does it take to replace belt tensioner?
Introduction. Automatic belt tensioners, standard in most cars now, make changing a serpentine belt a simple DIY repair. Follow the clear photos and step-by-step instructions and you'll be done in 15 minutes.
At what mileage should I replace my serpentine belt?
How often does a serpentine belt need to be replaced? Serpentine belts are built to last—much longer than before because of advancements in rubber technology. Under ideal conditions, a belt should stick with you for an average of 60,000 to 100,000 miles. Pretty impressive.
Can a belt tensioner leak?
Signs of a Camshaft Tensioner Leak
Unusual sounds: You might hear loud ticking and grinding noises. This is often due to a loose timing belt, which arises due to leaking from the tensioner. Premature belt wear: The timing belt can wear from old age. However, if the camshaft tensioner leaks, the belt will begin fraying.
What does a tensioner do in a car?
A drive belt tensioner is a pulley mounted on a spring mechanism or adjustable pivot point that is used to keep tension on the engine belts. Spring tensioners are designed to tension automatically while the pivot design types can be adjusted manually.
Can you over tighten a tensioner pulley?
A belt shouldn't be over-tightened. Any bearing that the belt rotates on can be burned out by an over-tightened belt. A pulley bearing can be ruined by an over-tightened timing belt.
How tight should tensioner pulley be?
When twisted either way from the middle, the tension in the belt must not be more than 12 inch. The belt is too tight if it is twisted more. The positions do not work for the vehicle.
What causes a tensioner to fail?
A seized tensioner cannot maintain proper belt tension. Dirt or mud can also jam the tensioner housing. A loose or worn pivot arm can allow unwanted movement; that results in belt noise and misalignment. Over time, this will increase belt wear and lead to premature belt failure.
How do you check a serpentine belt tensioner?
How to Tell If a Tensioner Is Bad?
- Listen for squealing noises within the engine when it is running. ...
- Watch the belt and belt tensioner while the engine is running. ...
- Turn off the engine. ...
- Push down on the middle of the belt while the engine is off and the components are cool enough to touch.
Can a bad belt tensioner cause vibration?
Grinding noises – Grinding and rumbling noises are another common sign of tensioner or idler pulley failure, usually due to failing bearings. 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.
How does a serpentine belt tensioner work?
The base holds the other parts, and the spring keeps the belt pulled tight. The pulley is what facilitates movement of the belt. The tensioner arm is found on the bottom of the tensioner, and if you press on it, it will work against the spring, delivering enough slack so that you can adjust or remove the belt.
Should the tensioner pulley 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.
Why is my idler pulley vibrating?
Grinding and rumbling noises are also common signs of tensioner or idler pulley failure, which are usually caused by bearings failing. A worn-out coil spring can also cause excessive tensioner movement, which can result in excessive vibration and rattling on the drive belt.
