What are the symptoms of a faulty alternator one-way clutch?
2 Answers
Symptoms of a faulty alternator one-way clutch: 1. The car lacks buffering during sudden acceleration or deceleration, causing significant noise when starting. Even with light throttle input after starting, the engine will produce noise; 2. The car fails to start, with insufficient battery power and noticeably dim headlights; 3. The car experiences weak driving performance and stalls. The primary function of the alternator one-way clutch is to mitigate engine impact during sudden acceleration or deceleration and regulate power generation. If the alternator one-way clutch is damaged, immediate repair is necessary; otherwise, it will affect the car battery's ability to charge. Applications of the alternator one-way clutch: diesel engines, V-cylinder engines with cylinder deactivation function, dual-mass flywheels, automatic transmissions with high shift shock, and alternators with high inertial torque.
A few days ago, I noticed the alternator one-way pulley was faulty while driving, and the symptoms were quite obvious. First, there was a continuous squeaking noise, especially loud right after starting the engine—it felt like the belt was rubbing against metal, sometimes becoming more noticeable during acceleration or deceleration. If the one-way pulley fails to engage, the alternator might stop spinning, causing the charging system to fail. The battery warning light came on, but no charge was going in. I once experienced a sudden battery drain, and the car almost stalled on the highway. It’s crucial to check immediately if the belt is slipping or has aging cracks. Delaying repairs could even burn out the alternator, leading to costly repairs. Make it a habit to inspect the engine bay monthly and address any unusual noises promptly—don’t procrastinate.
