CO(H4SO)-18
COOLING
Thermostat
6. Thermostat
A: REMOVAL
1) Set the vehicle on a lift.
2) Lift-up the vehicle.
3) Remove the under cover.
4) Drain the engine coolant completely. <Ref. to
CO(H4SO)-13, DRAINING OF ENGINE COOL-
ANT, REPLACEMENT, Engine Coolant.>
5) Disconnect the radiator outlet hose from thermo-
stat cover.
6) Remove the thermostat cover and gasket, and
then pull out the thermostat.
B: INSTALLATION
1) Install the thermostat in water pump, and then in-
stall the thermostat cover together with a gasket.
NOTE:
• When reinstalling the thermostat, use a new gas-
ket.
• The thermostat must be installed with the jiggle
pin (A) facing to front side.
Tightening torque:
6.5 N·m (0.65 kgf-m, 4.7 ft-lb)
2) Fill engine coolant. <Ref. to CO(H4SO)-13,
FILLING OF ENGINE COOLANT, REPLACE-
MENT, Engine Coolant.>
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 thermometer in water.
Raise water temperature gradually, and measure
the temperature and valve lift when the valve be-
gins 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:
Model with OBD:
80 — 84
°
°°
°
C (176 — 183
°
°°
°
F)
Model without OBD:
76 — 80
°
°°
°
C (169 — 176
°
°°
°
F)
Fully opens:
Model with OBD:
95
°
°°
°
C (203
°
°°
°
F)
Model without OBD:
91
°
°°
°
C (196
°
°°
°
F)
CO-00009
CO-00076
CO-00031
(A) Thermometer
(B) Thermostat
CO-00032
(A)
CO-00033
(A)
(B)
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