What are the symptoms of a bad belt tensioner?

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.

Should my belt tensioner bounce?

It is important to note that any abnormal chattering or bouncing of the tensioner arm under normal operation indicates the tensioner has already failed and should be replaced.

How much play should a belt tensioner 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.

Should timing belt tensioner move?

It is supposed to move. You should check tension under load so as you turn the belt.

How do you test a belt tensioner?

Should belt tensioner bounce at idle?

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.

How do you adjust a timing belt tensioner?

To even out the tension in the belt, use a spanner or socket wrench on the crankshaft-pulley bolt and turn the crankshaft two full turns clockwise . Tighten the locking bolt first to hold the tensioner in its new position. Tighten the pivot-spring bolt, which has a precise torque setting.

Does an idler pulley rotate?

The idler pulley is a common part that’s found on the majority of the vehicles on the road. Its primary function is to provide tension and guide the engine drive belt. … Like many automotive parts, the idler pulley becomes worn over time. The pulley spins against the belt wearing down both parts.

Can a bad belt 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.

Can a belt tensioner be adjusted?

Cars equipped with an automatic belt tensioner adjust themselves over time and do not require adjustment. This article shows you the process to adjust drive belts on a pivot-style belt adjuster.

How do I know if my timing belt is loose?

Symptoms of a Bad or Failing Timing Belt
  1. You Hear A Ticking Noise Coming From The Engine. …
  2. Your Car’s Engine Won’t Turn Over. …
  3. You Notice An Oil Leak Near The Motor. …
  4. You Experience Exhaust Issues. …
  5. Your Revs Start Acting Up.

How do I know if my timing belt is aligned?

Can you tighten a tensioner?

Turn the adjustment bolt on the side, top or bottom of the pulley counterclockwise with the ratchet and socket until the accessory belt is loose enough to remove. Tighten the tensioner pulley by turning the adjustment bolt clockwise with the ratchet and socket until the belt is tight.

How do you align a tensioner pulley?

How to align the pulley?
  1. Remove the belt (see How to replace a belt).
  2. Loosen the driven pulley (shaft pulley), and adjust up and down to obtain level.
  3. Firmly re-tighten the pulley.
  4. Re-install and re-adjust the belt.

Can you over tighten a tensioner pulley?

If you can turn it more than a 1/2 turn, you do not have enough tension on the belt. … Over-tightened belts can cause internal damage to the bearings inside the pulleys. It can also cause overheating of the belts and premature wear.

Can you over tighten an alternator belt?

Dear Anthony: A belt should never be over-tightened. … An over-tightened belt can burn out any bearing that the belt rotates on, including alternator, power steering pump, A/C compressor, idler pulleys, etc. An over-tightened timing belt can ruin any pulley bearing it is connected with.

How do I know if my serpentine belt is misaligned?

Noises that indicate your drive belt may be misaligned

As the speed of the serpentine belt or drive belt increases, it will probably become nearly inaudible. A squeal, on the other hand, is a chirp that gets louder and increases in volume along with engine speed.

What is pulley alignment?

Belt alignment or, more precisely, pulley alignment, is a principal maintenance activity. … The aim of belt alignment is to align the grooves of the drive and driven pulleys so that the belts run with minimal wear.

Why is my serpentine belt misaligned?

Serpentine belt misalignment can be caused by any of the accessory pulleys. Or, it may be the result of improper belt installation. There are two types of misalignment, each caused by the relationship of the pulleys to one another.

What does a misaligned belt sound like?

A chirping noise that increases in frequency as the engine is revved up can be the result of belt vibration caused by misaligned pulleys. In fact most cases of belt noise are caused by misaligned pulleys and belts.

How do you align a belt and pulley system?

How do you check a groove pulley?