What sound does an engine make when it has cylinder scoring?
2 Answers
If an engine shows slight signs of cylinder scoring, the following conditions may occur when the engine is idling: 1. There is usually a ticking, ticking, ticking abnormal sound. 2. As the temperature rises, the sound becomes duller and is accompanied by engine shaking. 3. In severe cases of cylinder scoring, the engine may stall directly. Additional information: 1. Engine cylinder scoring refers to 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 the engine stalling on its own. 2. The root cause of cylinder scoring is the difficulty in forming an oil film between the inner wall of the cylinder and the piston rings and pistons, resulting in poor lubrication or even dry friction.
I've encountered this situation several times. The sound of engine cylinder scuffing is instantly recognizable—it's usually a distinct metallic knocking noise, especially noticeable during acceleration or idling. It feels like someone underneath the car is randomly hammering on a metal plate. This abnormal noise is mostly caused by insufficient engine oil or worn piston rings leading to metal friction. If not addressed promptly, the engine temperature rises, and the entire cylinder wall can get scratched, eventually resulting in terrifyingly high repair costs. The last time I heard this sound while on a business trip, I immediately pulled over to check the oil level and found it below the minimum line. After topping up the oil, the noise disappeared. Delaying repairs not only makes them more expensive but could also lead to engine stalling and accidents. So, fellow drivers, don’t hesitate—check and get it repaired as soon as you hear any abnormal noise.
