Do you know just how many parts and accessories in your vehicle depend on the power provided by the serpentine belt or accessory belt? Well, you have your battery, your steering pump, A/C compressor, water pump, and many others. In reality, there are many parts in your car that rely on the belt for their operation. So, it is a must that you keep the belt in good shape. But, don't forget the tensioner assembly as well, especially the accessory belt tension pulley.
If you're familiar with your car's timing belt, it would be easy to understand the principles behind the operation of the accessory belt. It drives different parts in your car, and it is kept properly tensioned by the tensioner assembly. Tension is the main component that makes the belt's operation efficient, and this tension must be maintained at the correct level. It shouldn't be too much, or overloading may occur, causing damage on the components that the belt drives. Meanwhile, too little tension could lead to belt slacking and slipping, in which case the driven parts will not receive their needed power. To maintain the proper amount of tension on the belt, a tensioner assembly works with it, and one important component of that assembly is the tensioner pulley.
In many instances, the pulley remains strong and able to keep the tensioner properly working, maintaining proper tension on the accessory belt. However, problems may occur sometimes and compromise the accessory belt. Check out for these problems to prevent further damage. One is getting stuck. There are instances when the pulley refuses to budge, and this requires thorough inspection to determine the cause. If you notice that the pulley is moving excessively while the engine is on, check the bushing, the spring, or bearings in the tensioner. When these parts are damaged, excessive pulley movement results.
Sometimes, you will notice crack or any other visible damage on the tensioner pulley. Other than replacing the said part, you need to investigate on the cause of the problem. You need to address this to ensure that the new pulley will not end up cracked as well. Another common indication of problem is a weird noise coming from the area. Check the source at once before any noticeable problem occurs.
In case you find that the accessory belt tension pulley is already beyond repair, get a replacement pulley immediately. And when you do, check to see that your chosen pulley is of good quality, matching the tensioner assembly correctly and able to handle the proper tension that the accessory belt needs to keep it efficient at driving the different parts of your car. For your needed replacement, Parts Train is one resource that you can turn to.