Justy Wagon 4WD L3-1.2L SOHC (MPFI) (1992)
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Thermostat: Testing and Inspection
INSPECTION:
Replace the thermostat if the valve does not close completely at an ambient temperature or if the following test shows unsatisfactory results.
Thermostat Testing
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Immerse the thermostat and a thermometer in water.
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Raise water temperature gradually, and measure the temperature and valve lift when the valve begins to open and when the valve is fully opened.
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During the test, agitate the water for even temperature distribution.
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The measurement should be to the specification:
Starts to open:
MPFI model: 74.5-78.5°C (166-173°F)
Fully open:
MPFI model: 91°C (196°F)