Tundra 2WD V6-4.0L (1GR-FE) (2005)
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Thermostat: Specifications
Valve opening temperature .......................................................................................................................................................... 80 to 84°C (176 to 183°F)
Valve lift ............................................................................................................................................................ 8 mm (0.31 inch) or more at 95°C (203°F)
Check that the valve is fully closed when the thermostat is at low temperature ................................................................................. (below 40°C (104°F))