What Causes Low Engine Coolant Temperature in Cars?
2 Answers
Low engine coolant temperature is generally caused by a faulty thermostat or a constantly running cooling fan. The hazards of low engine coolant temperature are as follows: 1. When the engine temperature is low, the viscosity of the lubricating oil increases, leading to poor local lubrication, which accelerates wear on components and also increases engine power consumption. 2. Water vapor in the combustion byproducts condenses into water and combines with acidic gases to form acids, intensifying corrosion on the engine block and parts. 3. Unvaporized fuel due to low temperature washes away the oil film on friction surfaces (cylinder walls, pistons, piston rings, etc.) and dilutes the engine oil, increasing component wear and accelerating the degradation of oil performance.
I've been driving for nearly ten years and have seen many cases of low engine temperature, mostly due to a faulty thermostat stuck in the open position. The coolant circulates too quickly, preventing the engine from warming up properly, especially noticeable in cold winter weather. Last time, my car's temperature remained low, making cold starts difficult and fuel consumption skyrocketing. A check at the repair shop confirmed it was a thermostat issue, and replacing it fixed the problem. Another common reason is coolant leakage or insufficient levels, preventing the system from maintaining proper temperature. I recommend regularly checking the coolant level to ensure it's within the middle range of the reservoir. If it's low, top it up. Prolonged low engine temperature accelerates engine wear and increases exhaust pollution, so don't delay repairs—simple issues shouldn't become complicated. If the dashboard temperature gauge shows abnormally low readings, visit a professional repair shop as soon as possible to avoid accidents on the road.
