Thermostat; Removal; Inspection - Suzuki LT-A700X 2004 Service Manual

7-10 COOLING AND LUBRICATION SYSTEM

THERMOSTAT

REMOVAL

• Remove the left side cover. ($8-8)
• Drain engine coolant. ($2-16)
• Place a rag under the thermostat cover 1.
• Remove the thermostat cover 1.
• Remove the thermostat 2.

INSPECTION

Inspect the thermostat pellet for signs of cracking.
Test the thermostat 2 at the bench for control action, in the fol-
lowing manner.
Pass a string 1 between flange, as shown in the photograph.
Immerse the thermostat in the water contained in a beaker, as
shown in the illustration. Note that the immersed thermostat is in
suspension. Heat the water 3 by placing the beaker on a stove
4 and observe the rising temperature on a thermometer 5.
Read the thermometer just when opening the thermostat. This
reading, which is the temperature level at which the thermostat
valve begins to open, should satisfy the standard value.
& Thermostat valve opening temperature
Standard: 80.5 – 83.5 °C (177 – 182 °F)
Keep on heating the water to raise its temperature.
Just when the water temperature reaches specified value, the
thermostat valve should have lifted A by at least 8.0 mm
(0.31 in).
& Thermostat valve lift
Standard: Over 8.0 mm at 95 °C (Over 0.31 in at 203 °F)
A thermostat failing to satisfy either of the two requirements
(start-to-open temperature and valve lift) must be replaced.