A car thermostat valve regulates the temperature of coolant flowing between the engine block and the radiator. It remains closed when starting a cold engine to accelerate warm-up, and opens when the engine reaches optimum operating temperature (usually 85°C - 95°C).
Why Thermostats Are Essential
Ensures rapid engine warm-up, reducing cold-start engine wear and emissions.
Maintains consistent engine operating temperature for maximum fuel efficiency.
Prevents engine overheating caused by restricted coolant circulation.