OEM 2007 Toyota Corolla Thermostat

2007 Toyota Corolla Thermostat Parts Q&A

• Q: How to service and repair the thermostat on 2007 Toyota Corolla?

  A: The repair and servicing process starts with engine under cover RH removal then draining engine coolant subsequently unfastening the generator V belt and generator assembly followed by the thermostat removal. The first step involves removing the water inlet by unfastening its 2 nuts then it becomes ready for thermostat detachment. You should inspect the thermostat valve opening temperature which is marked on the device by submerging it in water while gradually heating it until the temperature falls within 80 to 84 degrees Celsius (176 to 183 degrees Fahrenheit). Replace the thermostat whenever its valves do not open to a suitable temperature range between 80 to 84 degrees Celsius (176 to 183 degrees Fahrenheit). A proper replacement of the thermostat should be considered if the valve lift reveals less than 10 mm (0.39 inch) during the 95 degrees Celsius (203 degrees Fahrenheit) inspection. Use replacement thermostats whenever the valve remains open at temperatures below 77 degrees Celsius (171 degrees Fahrenheit). The installation procedure starts with applying a new gasket on top of the thermostat before installation where you should position the jiggle valve vertically upwards while keeping in mind it can be placed between 10 degrees angles on either side of its correct orientation. After placing the generator assembly the water inlet should be installed with 2 nuts which need to be torqued to 11 Nm (112 kgf-cm, 8 ft. lbs.). Place engine coolant into the system while searching for coolant leaks before installing the right-hand engine under cover.