Inspection [10/2015 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus RC 300, 2023 Lexus RC 300, 2022 Lexus RC 300, 2021 Lexus RC 300, and 2020 Lexus RC 300. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT THERMOSTAT

HINT:

The valve opening temperature is inscribed on the thermostat.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Immerse the thermostat in water, and then gradually heat the water.
Check that the valve of the thermostat opens at the specified temperature.
Standard Valve Opening Temperature

80 to 84°C (176 to 183°F)

If the result is not as specified, replace the thermostat.

Check the valve lift.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Valve Lift

Standard Valve Lift

10 to 12 mm (0.394 to 0.472 in.) at 95°C (203°F)

If the result is not as specified, replace the thermostat.

Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F)).
If it is not fully closed, replace the thermostat.