What Causes the Idling Noise That Disappears When the Clutch is Depressed?
2 Answers
There are several main reasons why the idling noise disappears when the clutch is depressed: 1. Issues with the release bearing: The clutch release bearing is a crucial component in a vehicle. If it malfunctions due to poor maintenance, it can lead to financial losses and significant inconvenience, as replacing it requires considerable labor. Therefore, understanding the causes of release bearing failure and performing proper maintenance can extend its lifespan, improve productivity, and enhance economic efficiency. 2. Problems with the clutch disc, brake disc, or mechanical components inside the transmission, or resonance issues: It is recommended to contact a local 4S dealership for inspection and repair.
I've encountered the same issue before, which was caused by a faulty clutch release bearing. At idle, the engine is running but not in gear, so the clutch bearing is under constant pressure. In older cars, the bearing grease can dry out or the steel balls wear down, causing a rattling noise. When you press the clutch pedal, the bearing separates from the clutch pressure plate, removing the load and thus eliminating the noise. Additionally, it's worth checking the engine mount bushings - worn bushings can transmit engine vibrations into the cabin. This problem shouldn't be delayed as a shattered bearing could lock up the clutch, making gear engagement difficult. I recommend having a mechanic first identify the noise location - replacing the bearing and applying high-temperature grease should solve it.