Thermostat - Subaru Legacy 2003 Service Manual

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6. Thermostat

1) Lift-up the vehicle.

2) Remove under cover.

3) Drain engine coolant completely. <Ref. to

CO(H4SO)-14, DRAINING OF ENGINE COOL-

ANT, REPLACEMENT, Engine Coolant.>

4) Disconnect radiator outlet hose from thermostat

5) Remove thermostat cover and gasket, and pull

out the thermostat.

B: INSTALLATION

1) Install the thermostat in the water pump, and in-

stall the thermostat cover together with a gasket.

• Replace gasket with a new one.

• Thermostat must be installed with jiggle pin (A)

facing the front side.

Tightening torque:

2) Fill coolant. <Ref. to CO(H4SO)-14, FILLING OF

ENGINE COOLANT, REPLACEMENT, Engine

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.

6.5 N·m (0.66 kgf-m, 4.8 ft-lb)

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