What is an AC belt tensioner?
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 happens if the tensioner pulley fails?
When the tensioner or tensioner pulley fails, the loss of tension can cause the belt and pulleys to make high-pitched rattling or chirping noises. If the pulley bearing completely fails, it can also cause a squealing or even a grinding noise. Symptom 2: Knocking or slapping.
What causes a tensioner pulley to go bad?
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 a bad tensioner cause AC not to work?
Car ac compressor output. Serpentine belt problems usually result from one of these causes: a defective belt tensioner, misalignment of a pulley or defective bearings of any component of the drive system. Worn out drive system belts lead to poor hvac compressor output performance.
What happens if tensioner pulley breaks?
When the tensioner or tensioner pulley fails, the loss of tension can cause the belt and pulleys to make high-pitched rattling or chirping noises. If the pulley bearing completely fails, it can also cause a squealing or even a grinding noise.
Can I drive with a broken pulley?
So, how long can you drive with a bad idler pulley? The safety recommendation is not to drive the car at all and take it to a mechanic immediately. You should be concerned if the vehicle makes squeaking or rattling noises. The car can still run for months or break after a few days.
How do I tighten my AC belt?
To correct the problem, tighten your belt.
- Open the hood and locate the adjustment screw that controls tension on the serpentine belt.
- Place the socket end of the socket wrench over the wing-nut and turn clockwise to apply tension.
- Check the tension of the belt periodically.
- Do a secondary check of the belt tension.
How tight should AC belt?
The belt should have about a half an inch of play when at the appropriate tightness. If there is less than a half an inch, the belt will need to be loosened, if there is more, it will need to be tightened.