How can flywheel knock be diagnosed according to the technicians' claims?

Diagnosing flywheel knock often involves listening for specific symptoms that indicate an issue with the flywheel or related components. Turning the ignition off and on just as the engine stops allows the technician to observe the engine's behavior immediately after it has been turned off. If there is a persistent knocking noise that continues after the ignition has been switched off, it can indicate a problem with the flywheel or its mounting points.

This method effectively isolates the noise in a controlled environment, as it helps determine if the knocking is a result of engine operation or if it continues due to mechanical issues related to the flywheel itself. By listening for any unusual sounds in response to this action, technicians can gather critical data about the state of the flywheel and surrounding components, aiding the diagnosis.

In contrast, other methods, while useful for assessing different types of engine issues, do not specifically target the identification of flywheel knock. For example, shorting out the spark plugs affects engine operation and may produce other symptoms that could confuse the diagnosis. Listening for changes in engine RPM could indicate a variety of issues beyond just the flywheel, while inspecting the clutch pedal operation is more relevant to the functioning of the clutch assembly rather than diagnosing a knock related specifically to the flywheel.