What is the normal temperature of car coolant?
3 Answers
Car coolant's normal temperature is indicated by the center of the gauge at 90 degrees. Normally, after turning on the ignition switch, the coolant temperature gauge's pointer should deflect from 100°C towards 40°C, then gradually indicate the correct coolant temperature. Here's some information about coolant: 1. The full name of coolant is antifreeze coolant. It prevents the engine from freezing in winter and cools the engine when it generates high temperatures during operation, ensuring the vehicle can function properly in various environments. 2. Car coolant is composed of water, antifreeze, and additives. Based on its composition, it can be classified into alcohol-based, glycerol-based, and ethylene glycol-based types.
I've been driving for fifteen years, and the most accurate way to check coolant temperature is by looking at the gauge with the thermometer symbol in the middle of the dashboard. It's normal for the needle to point around the middle at 90°C, and it's common for it to rise to 95°C with the fan buzzing when stuck in traffic. If the needle approaches the red zone while climbing a hill in summer, be sure to pull over and turn on the heater to cool down. Remember to check the auxiliary tank level every month and top it up with the same color-specific antifreeze if it's low—never just pour in tap water. Older cars especially need attention to rubber hoses, as hardening and leaks can cause sudden temperature spikes.
After disassembling over a dozen engines, it was found that the cooling system is designed to maintain temperatures between 87-103°C. This temperature range ensures optimal combustion efficiency while keeping engine oil at its ideal lubricating viscosity. During operation, the radiator fan typically activates at 95°C and switches to full-speed operation at 105°C. A blue low-temperature warning light on the dashboard may indicate a stuck thermostat, while a red light demands immediate engine shutdown – continuing to drive for just half an hour can warp the cylinder head, with repair costs equivalent to three cases of coolant. It's crucial to check if the radiator cap seal has hardened, as pressure leaks can lower the boiling point.
