Yamaha 2016 Grizzly yf700gg, Service Manual

Page: 301 / 474

THERMOSTAT
6-8
EBS30215
CHECKING THE THERMOSTAT
1. Check:
• Thermostat
Does not open at 69–73 °C (156.2–163.4 °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 the temperature indicated on the
thermometer.
TIP
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 cover
• Thermostat housing (cylinder head)
Cracks/damage
→
Replace.
EBS30216
INSTALLING THE THERMOSTAT
1. Install:
• Copper washer
• Coolant temperature sensor
NOTICE
ECB01910
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”
• Gasket “2”
• Thermostat cover “3”
TIP
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 3-29.
4. Check:
• Cooling system
Leaks
→
Repair or replace any faulty part.
A. Fully closed
B. Fully open
71±2 ° C 84 ° C
(159±3 ° F) (183 ° F)
8 mm
(0.31
in )
T
R
.
.
Coolant temperature sensor
20 Nm (2.0 m·kgf, 14 ft·lbf)
T
R
.
.
Thermostat cover bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
New
New
2
1
a
3
New
LS