FX45 AWD V8-4.5L (VK45DE) (2006)
Thermostat: Testing and Inspection
INSPECTION AFTER REMOVAL
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Make sure that valves both in thermostat and water control valve are completely closing at normal temperature.
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Place a thread so that it is caught in the valves of the thermostat and water control valve. Immerse fully in a container filled with water. Heat while
stirring. (The example in the figure shows thermostat.)
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The valve opening temperature is the temperature at which the valve opens and falls from the thread.
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Continue heating. Check the maximum valve lift.
NOTE: The maximum valve lifts standard temperature for water control valve is the reference value.
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After checking the maximum valve lift, lower the water temperature and check the valve closing temperature.
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If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of the standard, replace thermostat and/or
water control valve.
INSPECTION AFTER INSTALLATION
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Check for leaks of engine coolant using radiator cap tester adapter [SST: EG17650301 (J33984-A)] and radiator cap tester (commercial service
tool).
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Start and warm up engine. Visually check if there is no leaks of engine coolant.