OEM 2001 Toyota Tacoma Thermostat

2001 Toyota Tacoma Parts Questions & Experts Answers

• Q: How to Service and Repair a Thermostat on 2001 Toyota Tacoma?

  A: Draining engine coolant and disconnecting the lower radiator hose should be the first steps in servicing or repairing a thermostat. Begin servicing the thermostat by unscrewing its 3 nuts before extracting both the water inlet assembly along with its gasket from the water pump unit. Afterward remove the gasket attached to the thermostat. Check the thermostat valve opening temperature by heating water while immersing the device because it should rest between 80 - 84 degrees Celsius (176 - 183 degrees Fahrenheit); if the measurement does not match these criteria then replace the thermostat. Check the valve lift since it must be at least 8.5 mm (0.335 inch) when the temperature reaches 95 degrees Celsius (203 degrees Fahrenheit). If the valve lift measurement is inadequate, the thermostat should be replaced. A thermostat failure exists when the valve remains open at temperatures below 40 degrees Celsius (104 degrees Fahrenheit); therefore you must replace the thermostat. To install the new thermostat begin by placing a gasket over it before setting the unit in position with the jiggle valve below and tightening the water inlet nuts to 20 Nm (200 kgf-cm, 14 ft. lbs.). After attaching the lower radiator hose you must fill the engine with coolant then start the engine to inspect for any leakage points.