What Causes Abnormal Noises After Starting the Car?

[MaggieDella]

Due to insufficient lubrication caused by the oil pump not yet circulating oil properly during a cold start, temporary friction noises may occur. Generally, no special treatment is needed; simply allow the car to warm up appropriately during a cold start. Symptoms: When the engine is idling, abnormal noises occur after pressing the clutch pedal, and the noises disappear when the pedal is released. Sometimes, noises may occur both when pressing and releasing the pedal. Diagnosis and Solution: If a "rustling" friction noise is heard from the clutch while the engine is idling, and the noise disappears when the clutch pedal is lifted with the foot, this indicates that the pedal return spring is too weak and requires repair or replacement. If the pedal free play is normal but intermittent impact or friction noises occur when the engine speed or vehicle speed changes, this usually indicates that the clutch sleeve return spring is too weak, broken, or detached.