Tracker Off-Road 800SX Service Manual page 108

THERMOSTAT
Removing
1. Drain some coolant from the cooling system.
2. Remove the coolant hose from the thermostat hous-
ing
MOD551A
3. Located below the coils. Remove the two cap screws
securing the thermostat housing.
MOD551C
4. Gently remove the thermostat housing away from the
engine. Remove the thermostat. Account for the ther-
mostat housing gasket.
MOD587
106
MOD586
Inspecting
1. Inspect the thermostat for corrosion, wear, or spring
damage.
2. Using the following procedure, inspect the thermo-
stat for proper operation.
A. Suspend the thermostat in a container filled with
water.
B. Heat the water and monitor the temperature with
a thermometer.
C. The thermostat should start to open at 83-87° C
(181-189° F).
D. If the thermostat does not open, it must be
replaced.
3. Inspect all coolant hoses, connections, and clamps
for deterioration, cracks, and wear.
NOTE: All coolant hoses and clamps should be

inspected per the maintenance schedule.
Installing
1. Using a new thermostat housing gasket. Place the
thermostat into the thermostat housing.
MOD586