If an engine has a light metallic knocking noise that diminishes when a cylinder is disabled, which technician's explanation is correct?

In this scenario, the light metallic knocking noise that decreases when a cylinder is disabled suggests that the issue is related to the specific cylinder that is disabled. Technician A's reasoning is likely based on the understanding that a knocking noise can be associated with various issues such as pre-ignition, detonation, or a mechanical problem in the affected cylinder, indicating that the noise is a result of the combustion process or mechanical characteristics of that cylinder.

The diminishing noise when the cylinder is disabled supports the idea that the knocking originates from that cylinder. This could involve issues like inadequate lubrication, excessive carbon buildup, or worn components that are only active when that particular cylinder is functioning. When the cylinder is disabled, the noise diminishes because that specific combustion event is no longer occurring.

Furthermore, the behavior exhibited suggests a direct relationship between the knocking noise and the operation of the cylinder, which aligns with diagnostic techniques that involve observing how changes in cylinder operation affect engine noise. Thus, the explanation provided by Technician A illustrates a sound understanding of engine dynamics and the significance of specific cylinder operation in diagnosing noise issues.