At what temperature does the Toyota Vios thermostat open?

[MaciRose]

Toyota Vios thermostat opens at 70 degrees. The thermostat is a valve that controls the flow path of coolant, serving as an automatic temperature-regulating device. It typically contains a temperature-sensing component that uses thermal expansion or contraction to open or close the flow of air, gas, or liquid. The steps for replacing the thermostat are as follows: 1. Turn off the engine and open the front hood. Disconnect the negative terminal of the battery to prevent the electric fan from suddenly operating during work, which could cause personal injury. 2. Remove the plastic cover outside the timing belt. 3. The position of the generator may affect the replacement of the thermostat, so the generator assembly needs to be removed. 4. Place a water tray under the car, then prepare to remove the water pipe and wait for the antifreeze to drain completely. 5. Remove the faulty thermostat and install the new one. After installing the thermostat, apply a layer of sealant to the water pipe area. Reinstall the removed water pipe, generator, and timing plastic cover to their original positions. Reconnect the negative terminal of the battery, add new antifreeze, and then start the car for testing.