Symptoms and Causes of Engine Cylinder Detonation?

[MacRiley]

Precursors to engine cylinder detonation include elevated engine block temperature; reduced vehicle acceleration power; abnormal noises from piston-cylinder friction that increase in volume and frequency with rising RPM. Below is an introduction to engines: 1. Overview: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy. The first external combustion engine was invented in 1816 by R. Stirling in the UK (Scotland), later improved by Watt into the steam engine. 2. Applicability: Engines can refer to both power generation devices and entire machines including power units (e.g., gasoline engines, aircraft engines). Types include internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), gas turbines (racing cars), and electric motors. 3. Historical Development: The history of engine creation and development has gone through three stages: steam engines, external combustion engines, and internal combustion engines.

[LeEloise]

My neighbor Lao Wang heard a loud banging noise from the engine while driving the other day, like firecrackers going off, and the car immediately started shaking like a sieve. This is commonly known as engine knocking, which basically means that internal engine components suddenly fail. The most common causes are a broken piston connecting rod or worn crankshaft bearings, which can puncture the cylinder wall directly. Why does this happen? Either the engine oil wasn't changed on time, leading to lubrication failure and metal-on-metal friction, or the cooling system failed, causing the temperature to exceed limits and warp the metal. Once, when I was driving my old Jetta up a mountain, I smelled a burning odor after prolonged high-RPM climbing and immediately pulled over to check—almost had an engine knock. This kind of failure usually requires an engine overhaul, costing at least five or six thousand yuan, so it's important to keep an eye on the oil dipstick and coolant temperature gauge regularly.

[GriffinDella]

Over the years of repairing cars, I've seen numerous engine seizure cases, which usually follow a progression. First, abnormal engine vibrations occur, followed by noticeable power loss, until finally there's a sudden loud clunk and complete breakdown. The core causes of engine seizure are either lubrication system failure—like oil pump blockage or oil pan leaks—or overheating-induced cylinder melting, most commonly due to coolant leakage or thermostat malfunction. Last week, a modified car with a seized engine was brought to the shop. Inspection revealed the owner had aggressively reprogrammed the ECU to boost power, resulting in excessively lean air-fuel mixture that caused detonation, melting a hole straight through the piston. A reminder to all: When operating an engine under prolonged high load, it's best to shut it off and let it rest for ten minutes every two hours.

[MacCaroline]

The most dreaded issue for fleets on long hauls is engine seizure, often starting with abnormal vibrations. Once, after driving a heavy truck non-stop for eight hours, I suddenly heard a metallic tearing sound, and the dashboard showed the coolant temperature skyrocketing. I immediately pulled over, popped the hood, and saw coolant spraying everywhere. The mechanic said it was caused by broken piston rings scraping the cylinder walls, leading to pressure leaks, and the high-temperature steam burst the coolant hoses. The root cause was long-term overloading, with the engine's cooling system unable to keep up. To prevent engine seizure, cultivate three habits: avoid stomping the throttle during cold starts, change the oil as specified in the manual, and stop to inspect immediately if the coolant temperature runs high.