Checking The Thermostat; Installing The Thermostat Assembly - Yamaha 2009 XP500Y TMAX Service Manual

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.
A. Fully closed
B. Fully open
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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6-8
2. Check:
• Thermostat cover
Cracks/damage → Replace.
EAS26480
INSTALLING THE THERMOSTAT
ASSEMBLY
1. Install:
• Thermostat
TIP
Install the thermostat with its breather hole "a"
facing forward.
a
2. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Refer to "CHANGING THE COOLANT" on
page 3-18.
3. Check:
• Cooling system
Leaks → Repair or replace any faulty part.
4. Measure:
• Radiator cap opening pressure
Below the specified pressure → Replace the
radiator cap.
Refer to "CHECKING THE RADIATOR" on
page 6-3.
THERMOSTAT