What are the effects of removing a car thermostat?
2 Answers
Removing a car thermostat will prevent the car from sensing temperature during cold starts, leading to cold engine starts and accelerated engine wear. Here is some information about car thermostats: 1. Function: Controls the circulation of coolant between the engine and the radiator. When the coolant temperature is low, the thermostat remains closed, allowing only the coolant inside the engine to heat up. This is referred to as the "small circulation." When the coolant inside the engine reaches a certain temperature, the thermostat automatically opens to connect with the radiator, forming what is called the "large circulation." 2. Purpose of installation: To help the engine reach its optimal operating temperature quickly, reduce engine wear, improve fuel atomization, and enhance the speed of cabin heating.
I've driven many cars and know the thermostat controls engine coolant temperature, keeping the engine at its optimal operating temperature. If removed, the coolant circulates too quickly, preventing the temperature from rising, causing the engine to constantly run cold. This increases fuel consumption due to incomplete combustion and accelerates internal engine wear as lower oil temperature reduces lubrication effectiveness. Long-term operation like this may shorten engine lifespan. In winter, the cabin heater takes longer to warm up, leaving occupants uncomfortably cold for extended periods. During summer stop-and-go traffic, abnormal coolant temperature fluctuations may occur, increasing overheating risks. My advice is not to remove it—just perform regular cooling system maintenance. Only with stable coolant temperature can you achieve fuel efficiency and safe long-distance driving.
