Inspection After Removal

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

Check valve seating condition at room temperature. It should seat tightly.

Check valve operation.

Courtesy of NISSAN NORTH AMERICA, INC.

Place a thread so that it is caught in the valve of the thermostat. Immerse fully in a container filled with water. Heat while stirring.
The valve opening temperature is the temperature at which the valve opens and falls from the thread.
Continue heating. Check the full-open lift amount.
After checking the full-open lift amount, lower the water temperature and check the valve closing temperature.

Thermostat	Standard
Valve opening temperature	Refer to Standard and Limit
Full-open lift amount	Refer to Standard and Limit
Valve closing temperature	Refer to Standard and Limit

Replace water inlet and thermostat assembly if valve opening and closing values are out of specifications.