What are the consequences of valve tappet noise?

[DeAvery]

Valve tappet noise can cause the following consequences: 1. Difficulty in starting the vehicle; 2. Weak acceleration when overtaking during driving; 3. Decreased engine power. The reason for valve tappet noise is: increased valve clearance, which affects the closing timing and sealing of the intake and exhaust valves, thereby impacting the engine's performance. Causes of engine valve noise include: 1. Too high or too low crankcase oil level, affecting the engine's oil pressure; 2. Severe wear of the valve guide; 3. Dirty valve lifter; 4. Increased clearance between the valve lifter, camshaft, or valve seat; 5. Damaged hydraulic lifter, causing internal oil pressure to drop too quickly, leading to abnormal valve opening and closing.