How to Check the Condition of an Alternator One-Way Clutch?

[SanRuby]

Methods for checking the condition of an alternator one-way clutch: 1. Use a multimeter to measure the alternator voltage, with normal values ranging between 12.5V and 14.8V. If the voltage is abnormal, it indicates alternator damage; 2. Inspect the alternator's condition by examining its appearance and clearance. Hold the alternator and swing it back and forth, left and right, to determine if the axial direction and clearance of the front bearing have increased. If the axial direction and clearance have changed, it indicates alternator malfunction. The function of the alternator one-way clutch is to mitigate the impact generated by the engine during sudden acceleration or deceleration and to regulate the power generation. When the alternator one-way clutch is damaged, the car lacks cushioning during sudden acceleration or deceleration, resulting in abnormal noises during startup and even when lightly pressing the accelerator. Timely repair is necessary if the alternator one-way clutch is damaged; otherwise, it may lead to the car battery not charging properly. Insufficient battery power can cause the car to lack driving force or stall.