OEM 2001 Toyota Tundra Thermostat

2001 Toyota Tundra Thermostat Parts Q&A

• Q: How Should You Service and Repair Your Thermostat on 2001 Toyota Tundra?

  A: As a first step when servicing the thermostat, the engine coolant needs to be drained. You need to take out the three nuts and wire clamp followed by removing the water inlet and thermostat from the water pump before you retrieve the thermostat gasket. Use water to test the thermostat through temperature changes until the valve opening reaches 80 - 84 degrees Celsius (176 - 183 degrees Fahrenheit); a non-conforming thermostat must be replaced. The spring-operated valve lift of the thermostat must reach at least 8.5 mm (0.335 inch) when subjected to 95 degrees Celsius (203 degrees Fahrenheit). If this check shows any issue, replace the thermostat. A thermostat must have a complete closure at low temperature conditions under 40°C (104°F); failure to close the valve requires replacement of the thermostat. After applying a new gasket to the thermostat you should install it with the downward-facing jiggle valve before secure the water inlet using three bolts at 20 Nm (200 kgf-cm, 14 ft. lbs. torque. The procedure requires attachment of the lower radiator hose, adds engine coolant before starting the engine to inspect for leaks then reviewing the engine coolant quantity.