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October 28, 2019

What does the tension pulley do?
A travel belt tensioner is a pulley mounted on a spring system or adjustable pivot point that is utilized to keep tension on the engine belts. … Both are being used to keeptension on the engine serpentine belts in order that they can drive the many engine accessories.

How do you adjust a tensioner pulley?
Change the adjustment bolt on the side, top or bottom level of the pulley counterclockwise with the ratchet and socket until the equipment belt is loose enough to eliminate. Tighten the tensioner pulley by turning the adjustment bolt clockwise with the ratchet and socket until the belt is tight.
How do you know

A tensioner pulley tutorials the belt around the tensioner and allows the belt to spin while the tensioner maintains pressure against it. A failing tensioner pulley could cause power loss and harm to your belt-driven devices. You might have a failing tensioner pulley if you hear any squeaking or squealing under the hood. Bearings on the pulley can degrade, causing noise and warmth. Pulleys are usually made of either plastic or steel, so check the pulley itself for just about any damage as well. At O’Reilly Car Parts, we’ve tensioner pulleys designed for many vehicle models.

The automatic pulley tensioner comes with an internal spring-loaded mechanism that keeps the serpentine belt under continuous tension. Its design enables it to keep the serpentine belt taut, in order that the other item pulleys rotate at the same rpm (revolutions each and every minute) while under the same secure pressure. Tensioner pulleys may also absorb gentle shock loads that happen when the air conditioner cuts on and off. As a continuously rotating element, the pulley tensioner can give off some warning signs before failure.

Rust and Corrosion
The pulley tensioner sits subjected to the elements at the front of the engine. Subjected to puddled water “splash-up,” as time passes the tensioner arm and pulley mechanism can rust. Corrosion can freeze the automated tensioner device or corrode the shaft bearings, that may cause a frozen placement in the adjustment pressure. Without the correct tension, the belt can slide.
Debris Contamination
Rocks, gravel and other street debris can be thrown up into the tensioner pulley grooves and jam the device. This can allow the serpentine belt to slip on the tensioner pulley and lose. Overheated pulley temp results, and eventually the serpentine belt will melt and snap off.
Pulley Tensioner Spring
The pulley tensioner spring within the housing may become weak from age and repeated contact with heat. This causes the belt to flutter and skip rather than maintaining a constant strain on the pulley. Symptoms of a poor spring present as glazing on the underside of the serpentine belt, with an intermittent flickering of the dashboard’s charging light indicator. Squealing or squeaking will end up being noticed at the belt area.
Pulley Wobble
If the tensioner pulley wobbles on its shaft, it means the inside shaft bearings have worn. This will cause a pulley misalignment. Terrible bearings cause an audible growling sound. The external ends of the serpentine belt will fray and stretch out the belt. Finally the rubber belt grooves flatten out and trigger key slippage. An excessively wobbling pulley can toss the belt off, triggering all the components to quit functioning.
Lever Arm Freeplay
Some tensioner pulleys have markings on the casing that indicate the utmost range that the pulley can travel. If the lever arm of the tensioner rides under or higher the designated mark, this implies a stretched belt or a lever arm that has jammed in a single position.
Pulley Misaligment
The tensioner pulley face must match to the other accessory pulleys with a parallel alignment. Placing a long, straightedge ruler against the face of the tensioner pulley, and then flushing it against another item pulley, can gauge the angle. Any off-angle measurement indicates put on shaft bearings in the pulley casing.
Serpentine Belt Noise
A moderately worn serpentine belt gives off a constant squeaking sound during engine idle. Belts which have worn severely task a loud chirping or squealing sound. The cause things to a glazed, put on or cracked belt. Dried out or partially frozen tensioner pulley bearings could cause such sounds by wearing out the belt prematurely.
Lever Arm Oscillation
A lever arm that repeatedly oscillates backwards and forwards during idle or more speeds means the the inside damper mechanism in the tensioner pulley has weakened or broken. This triggers sporadic tension strain on the belt and can manifest itself with intermittent chirping sounds.