How do you know if your serpentine belt tensioner is bad? (video)
How do you know if your belt tensioner needs to be replaced?
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. via
Can you tighten a belt tensioner? (video)
How long does it take to replace a 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. via
What happens when belt tensioner goes bad?
A seized or loose drive belt tensioner can cause the belt to snap, which will disables those accessories and can cause problems such as overheating, a dead electrical system and battery, or a disabled AC system. via
What does it sound like when a belt tensioner is bad?
If any tensioner pulley begins to wear out with time, it'll create more of a chirping noise. You'll also hear the chirping noise if the pulley grooves are damaged. This happens over the years due to friction, leading to cracks in the belt. via
Should I replace the tensioner when I replace the serpentine belt?
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. via
How long does it take to replace a tensioner pulley?
If you are doing the job at home, give yourself about four hours to change all the parts. You will need the following tools and parts: Replacement idler pulley. Tensioner pulley. via
How do you tighten a tensioner pulley?
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. via
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. via
How many tensioners does a car have?
There are three main types of belt tensioners found in the replacement auto parts market. Each one works a little differently, but all ensure that your alternator and auxiliary pumps receive the power needed to keep your car or truck moving. via
How do you change a tensioner pulley on a belt?
Turn the pulley bolt counterclockwise with a ratchet and a socket. Remove the bolt, the retaining washer and the pulley. Replace the pulley, washer and bolt and tighten to specified torque illustrated in the repair manual. Replace the tensioner in the engine and replace the bolt. via
What are the symptoms of a bad idler pulley?
Signs and Symptoms of a Bad Idler Pulley
What does a loose tensioner sound like?
You would hear a knocking sound if the timing belt goes loose due to a bad tensioner since the connected parts would start hitting the belt cover. If you can hear a chirping sound, the tensioner's pulley is bad. via
Can a bad belt tensioner cause power steering problems?
It is highly unlikely that a loose serpentine belt would destroy your power steering system. It is possible that the power steering would stop working, make odd noises, or steer jerkily because of a slipping belt, but in that event, replacing the belt should fix the problem. via
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. via
What causes tensioner to fail?
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. via
Why does my serpentine belt keep slipping off?
Slipping can be the result of a loss of belt tension (or a weak automatic tensioner) or pulley misalignment. When the belt slips off the track, the friction between the belt and accessory drive pulleys causes the belt to overheat. If you hear a high pitched squealing noise, it's probably time for a switch. via
How do I know if my serpentine belt is loose?
The serpentine belt should not be able to wander from side to side while in operation, but if its loose, it may do so, rubbing up against the lip of pulleys and creating a shiny or polished edge to the belt. If the edges of your serpentine belt are shiny, the belt is too loose and needs to be tightened. via
What is proper belt tension?
At center of the span length apply a force F (using a belt tension gauge) perpendicular to the belt span, large enough to deflect the belt 1/64” for each 1“ of belt span, q. So, for a 32” span, the deflection amount would be 32/64” or 1/2”. 3. via
What can I use instead of a belt tensioner tool?
One then simply needs a long enough open end wrench (or spanner, if you prefer) and a jack. Simply jack the tensioner up until you can remove the belt. via
Does serpentine belt affect timing?
Loosing the serpentine belt should not affect the engine timing. via
Is the tensioner pulley supposed to 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. via
What happens if idler pulley breaks?
Damaged bearing or pulley
A broken or seized pulley can quickly lead to a torn belt, or in less serious cases, the belt falling off of the engine. An engine without a belt can quickly run into issues such as overheating and stalling, as it's the drive belt that allows the engine accessories to function. via
How much does it cost to get an idler pulley replaced?
Idler Pulley Replacement Cost
The cost to replace the idler pulley of your driver belt will usually be somewhere between $80 and $200. The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. via
Is a serpentine belt the same as a tension belt?
In newer vehicles, one long belt runs every accessory. These belts are called serpentine drive belts. Instead of keeping tension on the belt by adjusting the tensioning screw in a bracket, the serpentine belt uses a spring-loaded tensioner. via