What are the symptoms after a car engine cylinder scuffing?

[VonBrady]

The symptoms after a car engine cylinder scuffing include: 1. Abnormal engine noise; 2. Lack of power; 3. Exhaust emissions; 4. Increased fuel consumption; 5. Difficulty starting or stalling. Engine cylinder scuffing refers to the appearance of obvious longitudinal mechanical scratches and abrasions on the inner wall of the cylinder within the movement range of the piston rings. In severe cases, adhesive wear occurs, causing difficulties in starting the engine or spontaneous stalling. The root cause of cylinder scuffing is the inability to form an oil film between the cylinder wall and the piston rings or pistons, leading to poor lubrication. Cylinder scuffing is one of the common faults in car engines. It refers to deep grooves being formed on the inner wall of the cylinder, resulting in the loss of sealing between the piston, piston rings, and cylinder wall during friction. This leads to a reduction in cylinder compression pressure and loss of power.

[JoelFitz]

That time my old car suddenly started making loud knocking noises on the highway, it felt like someone was hammering inside the engine. When I pressed the accelerator, the speed wouldn't increase no matter how hard I stepped on it - totally powerless. Fuel consumption also skyrocketed - normally one tank would last 500km, but now the warning light came on at just 350km. I also smelled a pungent burning odor, and when I got out I saw blue smoke coming from the exhaust pipe with the entire engine hood scalding hot. Later the mechanic said it was cylinder scoring - piston wear damaged the cylinder walls, causing oil leakage and combustion. That incident terrified me - I immediately pulled over and called a tow truck, otherwise it could have caused a fire or breakdown accident. Now I've developed the habit of checking the oil dipstick monthly to ensure proper oil levels, and changing to fresh oil annually to avoid similar troubles.

[StAriel]

The symptoms of cylinder scoring in a car are quite noticeable. When the engine is running, there will be a continuous metal grinding or rattling sound, as the movement of the pistons is hindered by the scratched cylinder walls. There is a significant drop in power output, and acceleration becomes sluggish and weak. For example, when I drove a faulty car, it struggled even to climb a slope. Fuel consumption also skyrockets because the engine needs more energy to overcome the friction. The most dangerous sign is blue or black smoke coming from the exhaust pipe, indicating that engine oil is being burned, and the engine temperature is excessively high, which could damage other components. Everyone should pay attention to unusual engine noises and regularly check the cooling and lubrication systems to avoid most issues and reduce repair costs.

[VonZane]

If the engine experiences cylinder scoring, common symptoms include: increased noise during startup or driving, such as knocking sounds; sluggish acceleration and slow throttle response; abnormal smoke emissions from the exhaust pipe; and a sudden increase in fuel consumption. I once experienced this on the highway and was quite frightened, so I immediately found a safe spot to pull over and inspect. Cylinder scoring significantly increases driving risks. It is recommended to slow down and stop immediately upon hearing any unusual noises to avoid further damage from continued driving, and then have it diagnosed and repaired at a professional shop.