What are the symptoms of a bad engine valve?

[GarrettMarie]

Symptoms of a bad engine valve include: 1. Oil entering the cylinder along the valve guide rod, leading to accelerated carbon buildup and oil contamination on the spark plugs, deteriorating performance or even failure, resulting in reduced engine power; 2. Tilting of the valve causing poor cylinder sealing, leading to decreased cylinder pressure and weakened engine power; 3. Accelerated oil consumption, which can easily cause engine damage due to oil shortage during long-distance driving; 4. Oil entering the cylinder and participating in combustion, with some carbon deposits remaining in the oil, worsening the engine's lubrication conditions and accelerating engine wear. The valve is a controllable mechanism that regulates air intake into the engine. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture, which then burns to generate power.