Montero SR 4WD V6-3.5L SOHC (1997)
Thermostat: Testing and Inspection
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Check that valve closes tightly at room temperature.
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Check for defects or damage.
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Check for rust or encrustation on valve. Remove if any. Immerse thermostat in container of water. Stir to raise water temperature and check that
thermostat valve opening temperature and the temperature with valve fully open [valve lift-over 9 mm (0.35 inch)] are at the standard value.
Standard value:
Valve opening temperature 82° C (180° F)
Fully open 95° C (203° F)
NOTE: Measure valve height when fully closed. Calculate lift by measuring the height when fully open.