Subaru Legacy 2003 Service Manual page 1777

COOLING
C: INSPECTION
Replace the thermostat if the valve does not close
completely at an ambient temperature or if the fol-
lowing test shows unsatisfactory results.
Immerse the thermostat and a thermometer in wa-
ter. Raise water temperature gradually, and mea-
sure the temperature and valve lift when the valve
begins to open and when the valve is fully opened.
During the test, agitate the water for even temper-
ature distribution. If the measured temperature is
within the specified range, the condition of thermo-
stat is normal.
Specified value:
Starts to open:
76.0 — 80.0 ° ° ° ° C (169 — 176 ° ° ° ° F)
Fully opens:
91 ° ° ° ° C (196 ° ° ° ° F)
(A) Thermometer
(B) Thermostat
THERMOSTAT
( A )
( B )
CO-00033
CO(H4DOSTC)-22