Table of Contents
How do you loosen a tensioner?
If equipped with a tensioner screw, back off the tensioner screw. Then, push the alternator toward the other pulleys, loosening the belt. To loosen an NAI tensioner, loosen the locking nut or bolt, then back off the tensioner screw. Push the pulley toward the other pulleys or accessories, loosening the belt.
How do you loosen a belt tensioner pulley?
Turn the bolt head in the center of the spring-loaded arm of the belt tensioner counterclockwise with a ratchet and socket to loosen the bolt. The tensioner will rotate freely before it comes to a stop. When the spring-loaded arm comes to a stop, continue to turn the bolt until the bolt loosens.
What tool do I need to loosen a belt tensioner?
Using a serpentine belt tool to loosen the tensioner and a belt placement tool to position the belt, we completed the entire job in less than 15 minutes, without breaking a sweat (or a knuckle). The serpentine belt tool comes with an assortment of sockets, making it the perfect choice for all the cars in your family.
Can you adjust the tension on a belt tensioner?
Locate the adjuster bolt on the belt tensioner used to secure the serpentine belt, and adjust the tension by loosening or tightening the adjuster bolt with a racthet and socket while you simultaneously move the belt back and forth gently to find the proper tension.
Are tensioner pulley reverse thread?
The PULLEY bolt on the tensioner is left hand thread (turn clockwise to loosen) but the bolt that retains the tensioner to the alternator bracket is standard right hand thread (turn counter-clockwise to loosen). If you are trying to remove the tensioner from the bracket it just takes a little muscle.
Is a tensioner pulley supposed to move?
Appearance: Cycle the tensioner (mounted on the engine) through the entire range of motion (from stop to stop) by applying torque to the arm with a wrench. The tensioner arm should move smoothly and freely. Solution: If you notice a binding, sticking or grinding tensioner arm, the tensioner should be replaced.
What causes a belt tensioner to bounce?
Excessive arm movement or bounce due to a worn damper: The damper moderates the action of the tensioner spring in much the same way that a shock absorber dampens a vehicle’s suspension. As the damper wears, the tensioner arm can bounce away from the belt, causing excessive belt slippage.
What is a belt tensioner tool?
Best Serpentine Belt Tools: Remove Your Belt Safely Responsible for removing your serpentine belt’s tensioner pulley, the tool works to position idler pulleys and reset belts to the correct amount of tension. Serpentine belt tools play a major role in maintaining and repairing a serpentine belt.
What size socket do I need for tensioner pulley?
Inspect the belt tensioner pulley to see what size gap it has for a tool to fit in. If the gap is 1/2 wide and square, as is the case in many vehicles, a standard 1/2 inch ratchet will be sufficient.
Can a tensioner pulley be adjusted?
There are two types of tensioner pulleys that provide the tension on an engine’s accessory belt or belts. The other requires adjustment with a bolt that is located on the side, top or bottom of the pulley. Only the latter type of tensioner pulley may be altered.
How tight should a belt tensioner be?
A general rule of thumb for the correct tightness is being able to twist a belt with a thumb and finger a 1/2 turn and feel resistance. If you can turn it more than a 1/2 turn, you do not have enough tension on the belt. If you cannot turn it a 1/2 turn, you have too much tension on the belt.
Are idler pulleys reverse threads?
If it’s just an idler pulley it’s standard. If it’s a tensioner pulley it may be reverse thread depending on the way you need to move the pulley to unload it.
What tool do you need to change a serpentine belt?
Tools/Supplies Needed: ratchet and socket set. torque wrench. new replacement belt. new tensioner. new pulley. wrench set. jack and axle stands or ramps.
Do you need a torque wrench for serpentine belt?
You need a digital ft-lb torque wrench.
Can a bad belt tensioner cause misfire?
The belt may oscillate between too little tension and too much tension. The belt will slip and catch, causing noise and vibration. This can cause a change in crankshaft speed that can be severe enough to cause the engine management system to think that a misfire just occurred.
Is idler pulley same as 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.
How do I know if my belt 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.
