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Disassembly
1. Thermostat cover
2. Packing
3. Snap ring
4. Thermostat
5. Thermostat seal
6. Thermostat case
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Thermostats
Look for:
A. Deteriorated, worn, cracked
B. Replace packing
C. Worn, cracked
Inspection
Heat the thermostat in the water. Measure the temper-
ature when the valve opens. Measure it again when
the valve lift is 11 mm [0.43 in.]. Replace if not within
standard.
Opening temp., °C [°F]
Assembly standard ... 71±2 [159.8±3.6]
Valve lift 11 mm [0.43 in.] temp., °C [°F]
Assembly standard ... 85 [185]
NOTE! Stir the water to maintain even temperatures
during the test.
NOTE! Confirm the valve opening temperature
(stamped on its mounting flange).
Group 26 Cooling System
193
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