Subaru 2002 IMPREZA Service Manual page 348

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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. The measurement should be to

the specification.

Starts to open:

76 — 80 ° ° ° ° C (169 — 176 ° ° ° ° F)

Fully opens:

91 ° ° ° ° C (196 ° ° ° ° F)

(A) Thermometer

(B) Thermostat

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2001 impreza