COOLING SYSTEM 6-9
INSPECTION
Inspect the thermostat pellet for signs of cracking.
Test the thermostat at the bench for control action, in the follow-
ing manner.
• Pass a string between flange, as shown in the illustration.
• Immerse the thermostat in the water contained in a beaker, as
shown in the illustration. Note that the immersed thermostat is
in suspensio . Heat the water by placing the beaker on a stove
and observe the rising temperature on a thermometer.
• Read the thermometer just when opening the thermostat. This
reading, which is the temperature level at which the thermostat
valve begins to open, should be within the standard value.
$ Thermostat valve opening temperature
Standard: Approx. 75°C (167°F)
THERMOSTAT
REMOVAL
• Drain engine coolant. (#2-13)
• Remove the secondary gear case cover.
• Remove the reserve tank 1 and water hose 2.
• Remove the water pump case.
• Remove the thermostat case.
• Remove the thermostat.
1 Thermostat 2 String
3 Stove 4 Thermometer
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