Why does the clutch not make noise when cold but does when hot?
2 Answers
Clutch not making noise when cold but making noise when hot is because the engine lacks oil. The following is an introduction to engine-related content: 1. Energy conversion: An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, an internal combustion engine usually converts chemical energy into mechanical energy. 2. Device: An engine can refer to both a power-generating device and the entire machine including the power device (e.g., gasoline engine, aircraft engine). The engine was first developed in the UK, so the concept of the engine also originates from English, and its original meaning refers to "a mechanical device that generates power."
I've noticed many people encounter the issue where the clutch doesn't make noise when the car is cold but starts squeaking when hot. This is quite common. The main cause is usually a problem with the clutch release bearing. When starting a cold engine, the lower temperature means thicker oil film and better lubrication, allowing the bearing to operate smoothly with minimal noise. However, once the engine warms up, the metal components of the bearing expand due to heat, increasing clearances. The oil thins out and drains away, leading to friction and that characteristic squeaking sound. Sometimes, the pressure plate or screws may also develop issues, but the release bearing is the most vulnerable part. To minimize wear, it's advisable to avoid riding the clutch (partially depressing it) during normal driving. If you notice any noise, don't delay—get it checked and the bearing replaced promptly at a repair shop to prevent further damage. During maintenance, don’t forget to inspect the clutch system to extend its lifespan and avoid future headaches.
