What are the symptoms before engine cylinder scoring?

[KarterMarie]

Possible symptoms include reduced cylinder compression pressure, loss of power, and increased crankcase pressure due to downward leakage of combustible mixture. The following are relevant introductions about preventing cylinder scoring: 1. For new engines and overhauled engines: They must undergo a break-in period first, which means operating according to the break-in procedures under good lubrication conditions, following the principle of gradually increasing speed from low to high and load from small to large, before being put into formal load operation. 2. According to the instruction manual: Correctly select the clearance between the piston skirt and cylinder liner, as well as the opening clearance and side clearance of piston rings. Additionally, during repairs, it is necessary to control piston offset and ensure the dimensional accuracy of the cylinder liner. 3. Maintain water temperature: Keep the cooling water at normal temperature between 70°C and 95°C to avoid engine overheating. Preheating measures should be taken before starting in winter.

[CamilaAnn]

Last time my car almost seized up, the body was shaking like a massage chair, especially noticeable during acceleration. The engine also had a temper, with unstable idling and the tachometer dancing around. Blue smoke came out of the exhaust, with a distinct burning oil smell. The temperature gauge was creeping up, even though there was no traffic. The worst part was the knocking metal noise, especially during cold starts, reminding me to hurry to the repair shop. Ignoring these small signals could lead directly to a major repair bill, with cylinder replacement costing a fortune.

[CeciliaFitz]

Listening to the engine is a fundamental skill. Before cylinder scoring occurs, it will whine and make a metallic scraping sound, which becomes more piercing during acceleration. The power weakens, the car feels sluggish when you press the throttle, and fuel consumption secretly increases. If the oil consumption is too fast and the exhaust emits smoke like burning wood, pay attention to the radiator fan if the water temperature is unusually high. These minor issues accumulate over time, and if ignored, the car may suddenly break down one day. Remember to check cylinder pressure and oil condition early.

[McBraxton]

If the car has significant idle shaking, a buzzing noise when accelerating that feels muffled, frequently high coolant temperature warnings, blue smoke from the exhaust indicating oil burning, rapid oil consumption without leaks, noticeably weak power like a snail going uphill, and rattling noises especially when cold, check for spark plug carbon buildup immediately. Ignoring these signals could lead to cylinder scoring.