What Causes the VVT Variable Timing Wheel to Make Abnormal Noises?

[DiKevin]

VVT variable timing wheel produces abnormal noises during car idling or low-speed operation due to the following reasons: 1. Excessive clearance between the piston and cylinder wall, 2. Over-tight assembly of the piston pin or connecting rod bearing, 3. Wear of the camshaft profile, etc. These faults can lead to unstable engine idling, poor acceleration, increased fuel consumption, and abnormal engine noises, typically metallic screeching or whistling sounds. Below is more information about VVT variable valve timing technology: 1. VVT variable valve timing technology is a technique used in automotive piston engines. 2. VVT variable valve timing technology refers to adjusting the intake valve timing under specific conditions by advancing or delaying the intake valve angle, thereby regulating the intake and exhaust volume and the valve overlap angle. This increases intake volume and efficiency, resulting in improvements in engine power, torque, and other aspects.