Where is the thermostat installed?
2 Answers
The thermostat is generally installed at the connection between the lower radiator hose and the engine block. There is a circular cover with two screws on top; removing it will reveal the thermostat. Here is more information about the thermostat: 1. The function of the thermostat is to control the coolant's circulation between the large and small loops. When the thermostat opens, the coolant flows through the large loop; when it closes, the coolant flows through the small loop. 2. If the thermostat is stuck in the closed position, only the small loop will function. During hot summers, since the coolant does not circulate through the radiator's large loop, the engine temperature will rise significantly. Some car owners may remove the thermostat to maintain continuous large-loop circulation. A faulty thermostat can cause rapid heat dissipation and incomplete fuel combustion in the car.
I've been working on cars for almost twenty years, and the thermostat is usually installed near the engine's water pump, on that thick hose between the engine cylinder head and the radiator. You'll need to pop the hood, and it's often there, shaped like a round cover. Why is it placed there? Because it can quickly respond to engine temperature changes and control coolant flow. Don't underestimate it—if it gets stuck or wears out, the car can easily overheat or guzzle fuel. I remember one time a customer's car was smoking from the engine, and after a long inspection, it turned out the thermostat wouldn't open. Replacing it fixed the issue. During regular maintenance, I always remind owners to check the water pump and hose connections to avoid breaking down on the road. The location varies by car model, but most modern cars follow this setup. Older cars might have it at the front of the hose—just don't go disassembling things randomly.
