Yamaha CS50 - Checking the Thermostat; Installing the Thermostat

COOL
THERMOSTAT
5-6
EAS00462
CHECKING THE THERMOSTAT
1. Check:
• thermostat
Does not open at 70.0°C ~ 82.0°C

Replace.

a. Suspend the thermostat in a container filled
with water.
b. Slowly heat the water.
c. Place a thermometer in the water.
d. While stirring the water, observe the ther-
mostat and thermometer’s indicated tem-
perature.

 Thermostat
 Container
 Thermometer
 Water

A
Fully closed

B
Fully open
NOTE:
If the accuracy of the thermostat is in doubt,
replace it. A faulty thermostat could cause
serious overheating or overcooling.
EAS00466
INSTALLING THE THERMOSTAT
1. Install:
• thermostat
• cylinder head
2. Fill:
• cooling system
(with the specified amount of the recom-
mended coolant)
Refer to “CHANGING THE COOLANT” in
chapter 3.
3. Check:
• cooling system
Leaks

Repair or replace any faulty part.
5 Nm (0.5 m • kg)