THERMOSTAT
6-8
EAS26450
CHECKING THE THERMOSTAT
1. Check:
• Thermostat
Does not open at 71–85 °C (159.8–185.0 °F)
→ Replace.
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a. Suspend the thermostat “1” in a container “2”
filled with water.
b. Slowly heat the water “3”.
c. Place a thermometer “4” in the water.
d. While stirring the water, observe the thermo-
stat and thermometer’s indicated tempera-
ture.
NOTE:
If the accuracy of the thermostat is in doubt, re-
place it. A faulty thermostat could cause serious
overheating or overcooling.
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2. Check:
• Thermostat housing
Cracks/damage → Replace.
3. Check:
• Thermostat hoses
• Thermostat pipes
• Radiator inlet hose
• Thermostat cover/radiator filler pipe
• Plunger control unit hose 1
Cracks/damage/wear → Replace.
EAS26490
INSTALLING THE THERMOSTAT
ASSEMBLY
1. Install:
• Copper washer
• Coolant temperature sensor
CAUTION:
EC3P61019
Use extreme care when handling the coolant
temperature sensor. Replace any part that
was dropped or subjected to a strong im-
pact.
2. Install:
• Thermostat “1”
• Thermostat housing “2”
NOTE:
Install the thermostat with its breather hole “a”
facing up.
3. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Refer to “CHANGING THE COOLANT” on
page 3-19.
4. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
A. Fully closed
B. Fully open
T
R
.
.
Coolant temperature sensor
18 Nm (1.8 m·kg, 13 ft·lb)
New
1
2
a
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