1. Starter Motor: The starter motor engages with the flywheel to crank the engine. If the starter motor is damaged, it can make a loud clicking noise.
2. Bendix Gear: The starter motor uses a Bendix gear to engage with the flywheel. If the Bendix gear is damaged or worn out, it can produce a clicking sound when starting the car.
3. Solenoid: The solenoid is an electrical component that engages the Bendix gear with the flywheel. If the solenoid is faulty, it may not be able to properly engage the gear, resulting in a clicking sound.
4. Low Battery: A weak or low battery may not provide enough power to the starter motor, causing it to click but not engage properly.
5. Loose or Damaged Wiring: Loose or damaged electrical wiring can also lead to clicking sounds when starting the car.
6. Flywheel Ring Gear: The flywheel ring gear is what the Bendix gear engages with to crank the engine. If the ring gear is damaged, it can cause a loud clicking noise.
If you are experiencing a loud fast clicking noise when starting your car, it's important to have it checked by a qualified mechanic to determine the exact cause and get it repaired.
