Section 3 (Engine Cooling System (H4DO)): Thermostat: Inspection
WARNING: This page is about a different variant/trim than selected.
- Check that the thermostat does not have deformation, cracks or damage.
- Check that the thermostat valve closes completely at an ambient temperature.
- Immerse the thermostat and a thermometer in water. Raise water temperature gradually, and check the temperature and valve lift when the valve begins to open and when the valve is fully opened. Replace the thermostat if faulty.
NOTE:
- During the test, agitate the water for even temperature distribution.
- Leave the thermostat in the boiling water for five minutes or more before measuring the valve lift.
- Hold the thermostat with a wire or the like to avoid contacting with container bottom. Starting temperature to open:
Engine side
86 - 90°C (187 - 194°F)
CVTF cooler (with warmer feature) side
48 - 52°C (118 - 126°F)
Full open temperature:
Engine side
95°C (203°F)
CVTF cooler (with warmer feature) side
63°C (145°F)
Total valve lift:
Engine side
8.0 mm (0.315 in) or more
CVTF cooler (with warmer feature) side
6.0 mm (0.236 in) or more