What are the effects of engine temperature being too high or too low?

[OPeyton]

Engine temperature being too high or too low has the following effects: 1. If the engine temperature is too high, it leads to reduced cylinder air intake and abnormal combustion, resulting in decreased engine power or poor fuel economy; 2. High engine temperature can cause pre-ignition and knocking in gasoline engines; 3. High engine temperature accelerates wear of engine components due to poor lubrication, leading to seizure or damage of parts; 4. Low engine temperature makes ignition difficult or combustion delayed, increasing fuel consumption; 5. Engine oil viscosity increases, causing poor lubrication and exacerbating component wear, while also increasing power consumption; 6. Unvaporized fuel at low temperatures washes the cylinder surface, damaging the lubricating oil film and accelerating component wear; 7. Low engine temperature makes engine starting difficult.