What is a tensioner used for?
A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. It also helps protect other components such as the alternator and water pump from undue stress and premature failure. In addition, a tensioner is a relatively inexpensive part to replace.
What is an advantage of an automatic belt tensioner?
Both chain and belt drives, if allowed to run loose, will show an increased rate of wear. The Universal Drive Tensioner was designed to operate in all directions and adjusts easily as tension requirements change. A properly tensioned drive runs smoother and quieter, delivers maximum horsepower, and wears longer.
When should I replace my tensioner?
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.
What is bolt tensioner?
A hydraulic bolt tensioner is an annular jack that fits over the bolt and nut to be tightened. The jack pushes against the bolted joint and pulls on the end of the bolt, which needs to be at least one diameter longer to accommodate the bolt tensioning tool.
What causes a tensioner to fail?
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 causes a belt 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.
Can I drive with a bad tensioner?
Driving with a bad belt tensioner is unsafe since the tensioner is meant to guarantee ample tension that powers accessories. Wear on the belt tensioner will eventually cause the belt to slip, generate loud noise, and also create an unsafe level of heat along the accessory pulleys.
How long does a drive belt tensioner last?
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 much does it cost to replace a tensioner pulley?
How much does it cost to replace a tensioner pulley? You will pay somewhere between $125 and $380 to have your tensioner pulley replaced. The labor should run between $45 and $155, while parts can cost as little as $85 or as much as $225. Symptom 1: Squealing, rattling, or chirping.
What are the signs of a bad belt tensioner?
Squeaking or Grinding Noise.
How to tell if a timing belt tensioner is bad?
Grinding or squeaking noise from the belts or tensioner The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner.
How much does a belt tensioner cost?
The average cost for drive belt tensioner replacement is between $236 and $264. Labor costs are estimated between $80 and $100 while parts are priced between $156 and $164. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.