Disassembling, Inspecting And Reassembling Thermostat; Inspecting Thermostat - Mitsubishi S3Q2 Service Manual

COOLING SYSTEM

2.2 Disassembling, inspecting and reassembling thermostat

Disassembling sequence
1 Thermostat cover
2 Gasket
2.2.1

Inspecting thermostat

Be careful of burns or a fire when measuring tempera-
ture, as it involves a high-temperature and open flame.
To test the thermostat operation, immerse the thermostat in a
container filled with water. Heat the water, while measuring
the water temperature. Record the temperature at the
conditions shown in the table below. If the temperatures are
not within the standard range, replace the thermostat.
Note: (a) Stir the water in the container with a stick to
ensure uniform temperature distribution.
(b) Before installing the thermostat, be sure to check
the valve opening temperature stamped on the
thermostat valve side face.
Item
Temperature at which valve starts opening
Temperature at which valve lift becomes 8
mm [0.31 in.] or more.
10-4
Disassembling, inspecting and reassembling thermostat
Standard
75 to 78°C
[167 to 172°F]
90°C
[194°F]
18 ± 2 N·m
{1.8 ± 0.2 kgf·m}
[13.0 ± 1.4 lbf·ft]
1
2
Replace
3
4
3 Thermostat
4 Thermostat case
Inspecting thermostat
8
[0.32]
0 75 to 78°C 90°C
[167 to 172°F] [194°F]
Temperature