13. Check Thermostat

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Remove thermostat.
Check valve seating condition at normal room temperatures.
It should seat tightly.
Check valve opening temperature and valve lift.

Fig 1: Testing Thermostat
Courtesy of NISSAN MOTOR CO., U.S.A.

Valve opening temperature: 95°C (203°F) [standard]

valve lift: More than 8.0 mm/108°C (0.315 in/226°F)
Check if valve is closed at 5°C (41°F) below valve opening temperature. For details, refer to THERMOSTAT AND WATER CONTROL VALVE .

OK or NG

OK: GO TO 14.
NG: Replace thermostat.