THERMOSTAT
6-7
EAS26450
CHECKING THE THERMOSTAT
1. Check:
• Thermostat “1”
Does not open at 71–85°C (160–185°F) →
Replace.
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a. Suspend the thermostat “3” in a container
“4” filled with water.
b. Slowly heat the water “2”.
c. Place a thermometer “1” in the water.
d. While stirring the water, observe the ther-
mostat and thermometer’s indicated tem-
perature.
NOTE:
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause seri-
ous overheating or overcooling.
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2. Check:
• Thermostat housing cover “1”
• Cracks/damage → Replace.
EAS26490
INSTALLING THE THERMOSTAT ASSEM-
BLY
1. Install:
•Thermostat
NOTE:
Install the thermostat with its breather hole “a”
facing up.
2. Install:
• Thermostat cover
NOTE:
Before installing the thermostat cover to the
cylinder head, lubricate the O-rings with a thin
coat of lithium-soap-based grease.
3. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-20.
4. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
5. Measure:
• Radiator cap opening pressure
Below the specified pressure → Replace
the radiator cap.
A. Fully closed
B. Fully open
C. Opening (mm)
D. Temperature
Water jacket outlet joint bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
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