Inspection After Removal

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Check valve seating condition at ordinary room temperatures. It should seat tightly.
Check valve opening temperature and maximum valve lift.

Fig 1: Thermostat And Standard Values Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Valve Opening Temperature And Maximum Valve Lift
Courtesy of NISSAN MOTOR CO., U.S.A.