Thermostat; Removal; Inspection - Suzuki GW250 Service Manual

THERMOSTAT

REMOVAL

• Remove the right fuel tank cover. (8-5)
• Drain a small amount of engine coolant. (2-15)
• Place a rag under the connector cap 1.
• Move the connector cap 1 by removing the connector cap
bolts.
• Remove the thermostat 2.

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 1 between flange 2 of thermostat, as shown.
• Immerse the thermostat 3 in the water contained in a pan
and note that the immersed thermostat is in suspension. Heat
the water 4 by placing the pan on a electric stove 5 and
observe the rising temperature on a thermometer 6.
• Read the thermometer just when opening the thermostat. If
this reading, which is the temperature level at which the ther-
mostat valve begins to open, is out of the standard value,
replace the thermostat with a new one.
 Thermostat valve opening temperature:
Standard: Approx. 88 °C (190 °F)
NOTE:
* Do not contact the thermostat 3 and column thermometer 6
with a pan.
* As the thermostat operating response to water temperature
change is gradual, do not raise water temperature too quickly.
* The thermostat 3 with its valve open even slightly under nor-
mal temperature must be replaced.
COOLING AND LUBRICATION SYSTEM 7-11