Why Does a Car Generator Make Abnormal Noises?
2 Answers
Causes of abnormal noises in a car generator include motor bearings, belts, and brushes. Below is an analysis of different causes: 1. It is usually the bearing making noise, or the bearing is damaged, causing the rotor and stator to rub against each other; or it could be due to a loose generator fan blade. If the bearing is noisy or damaged, it can be replaced. 2. If the car generator's belt is making noise, it is recommended to inspect it first. The belt noise could be due to being too tight or too loose. If the issue cannot be resolved, the belt should be replaced. Do not wait until the problem worsens before checking, as it may affect the driver's normal operation of the vehicle.
My car's alternator is making strange noises, usually due to bearing wear. As an experienced car enthusiast who frequently tinkers with vehicles, I know the bearings inside the alternator rotate non-stop, and over time they can run low on lubrication or accumulate dust, causing squeaking or screeching sounds. The belt is another common culprit – if it's too loose or worn out, it can slip and produce constant squealing, especially during acceleration or turns. I've also encountered cases where the fan blades were damaged, either from being hit by rocks or caked with grease, resulting in loud whirring noises. If these minor issues are ignored, the alternator may completely burn out, leaving the car unable to start. So whenever I hear unusual noises, I immediately inspect it, starting with the simplest checks like examining the belt condition and feeling for bearing temperature rise. It's not worth saving a little money now only to face bigger problems later.
