Subaru IMPREZA GD 2007 Series Manual page 81

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COOLING
B: INSTALLATION
1) Install a gasket to thermostat.
NOTE:
Use a new gasket.
2) Install the thermostat and thermostat cover.
NOTE:
The thermostat must be installed with the jiggle pin
facing upward.
Tightening torque:
12 N·m (1.2 kgf-m, 8.7 ft-lb)
(D)
T
(A) Thermostat cover
(B) Gasket
(C) Thermostat
(D) Jiggle pin
3) Connect the radiator outlet hose to thermostat
cover.
4) Install the under cover.
5) Lower the vehicle.
6) Fill engine coolant. <Ref. to CO(H4SO)-16,
FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
Thermostat
(C)
(B)
(A)
CO-02221
CO(H4SO)-22
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.
• Inspection method
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. The measured value should
meet the specification.
NOTE:
• Leave the thermostat in the boiling water for
five minutes or more before measuring valve lift.
• Hold the thermostat with a wire or the like to
avoid contacting with container bottom.
Opening start temperature:
80 — 84°C (176 — 183°F)
Full open temperature:
95°C (203°F)
Valve lift:
9.0 mm (0.354 in) or more
(A) Thermometer
(B) Thermostat
( A )
( B )
CO-00033