5 Causes of Pulley Noises
V-belts rely on idler pulleys to slide smoothly without interference. But over time, they can wear out and make noises that are a sign of impending idler pulley problems.
Address minor noises now before they lead to costly repairs. We look at the most common causes of pulley noises, how to identify them, and the expected replacement costs.
What is a pulley? Idler pulleys are small wheels used to guide the drive belt of your car’s engine. They don’t drive anything directly, they just change the direction of the belt. They’re simple little parts, but they’re very important to keep the belt moving smoothly.
Common Causes of Pulley Noises
If you hear a noise coming from an idler pulley, it’s usually one of three things. The reel could be worn out, slipping, or completely damaged. Below we will explain each cause in the order in which they occur.
It is important to pay attention because the noise can get worse over time. Even if the noise you hear due to the first cause gets quieter, it is reason enough to have a mechanic check your vehicle.
If you don’t, the noise will get worse and you will have a more serious problem that will cost you a lot to repair.
1) Pulleys are old and worn
The idler pulley rotates constantly with the drive belt. This causes the pulley to wear out over the years of repeated use. The pulley surface will become scratched or scratched. Then it will start to make noise, but it won’t be very noticeable at this point.
2) Bearing Issues
If you hear a rattle, whine, or squeal in your car, it may be due to a bearing issue in the idler pulley. Over time, the bearings will wear out and become loose, seize, or overheat.
3) Slipping Pulley
If the tension pulley becomes too worn, it is prone to slippage. This causes the pulley to stick and rub against the engine belt. The result is a squealing noise from around the engine that will only get worse until the pulley is replaced. In addition, this can cause wear and damage to other belts and components in the engine.
4) Pulley Damage
In extreme situations where the first two causes of idler pulley noise are ignored, the idler pulley will become damaged and eventually break completely. The rolls will crack and fall apart piece by piece. This will cause a chain reaction where the V-belt will start to snap or break completely.
When this happens, it will cause a number of engine problems, including: B. Stalling and overheating. Additionally, a louder, continuous squealing noise will occur, causing discomfort to the car and those around you.
5) V-Belt Trouble
Your engine relies on belts to power vital components like the alternator, water pump, and power steering pump. However, if the belt becomes worn or damaged, it can slip and cause squealing noises. This may be due to the idler pulley that helps maintain proper tension on the belt.
To avoid further issues, regularly check your belt for signs of wear like cracks or uneven wear. If you notice any issues with the belt, you should take your car to an independent repair shop or dealership service center to have it replaced.
