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• Check thermostatic movement of wax pellet as follows :
a) Immerse thermostat (1) in water, and heat water gradually.
b) Check that valve starts to open at specific temperature.
Temperature at which valve begins to open
: 80 – 84°C (176 – 183°F)
Temperature at which valve become fully open
: 95 – 97°C (203°F)
Valve lift
: More than 8 mm at 95°C (203°F)
If valve starts to open at a temperature substantially below or
above specific temperature, thermostat unit should be replaced
with a new one. Such a unit, if reused, will bring about overcool-
ing or overheating tendency.
2. Thermometer
3. Heater
INSTALLATION
Reverse removal procedure for installation noting the following
points.
• When positioning thermostat (1) on thermostat case (2), be
sure to position it so that air bleed valve (3) comes at posi-
tion as shown in figure.
• Use new O-rings when installing.
• Adjust water pump belt tension referring to WATER PUMP/
GENERATOR DRIVE BELT TENSION INSPECTION AND
ADJUSTMENT in this section.
• Adjust A/C compressor belt tension (if equipped) referring to
Section 1B.
• Refill cooling system with proper coolant referring to "COOL-
ING SYSTEM REFILL".
• Verify that there is no coolant leakage at each connection.
ENGINE COOLING 6B-13
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