- Excessive Play: When the flywheel is not properly secured, it may have excessive play or movement within the bell housing. As the engine runs, the flywheel's movement can create a knocking or rattling noise.
- Contact with Other Components: If the flywheel is loose enough, it can come into contact with other components inside the bell housing, such as the starter or the transmission housing. This contact can produce a knocking sound as the flywheel vibrates against these components.
- Resonance: The loose flywheel can create vibrations that resonate and amplify throughout the engine compartment. These vibrations can cause various components, such as heat shields or loose parts, to vibrate and produce a knocking sound.
It's important to note that a knocking sound can also be caused by several other issues in an engine, such as worn bearings, connecting rod issues, or piston slap. Therefore, it's crucial to have a qualified mechanic inspect and diagnose the source of the knocking sound to ensure accurate and timely repairs.
