Replace the thermostat if the valve does not close completely at an ambient temperature or if the following test shows unsatisfactory results.
• Inspection method
Immerse the thermostat and a thermometer in water. Raise water temperature gradually, and measure 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 temperature 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.
Starting temperature to open:
Engine side
SOHC MODEL
80 — 84°C (176 — 183°F)
DOHC MODEL
76 — 80°C (169 — 176°F)
ATF warmer side
69 — 73°C (156 — 163°F)
Fully opens:
Engine side
SOHC MODEL
95°C (203°F)
DOHC MODEL
91°C (196°F)
ATF warmer side
84°C (183°F)
Valve lift:
Engine side
9.0 mm (0.354 in) or more
ATF warmer side
8.0 mm (0.31 in) or more
|
(A) |
Thermometer |
|
(B) |
Thermostat |