Nanni 5.280HE Workshop Manual page 110

03-M Series, WSM
Radiator Water Leakage
1. Pour a specified amount of water into the radiator.
2. Set a radiator tester and an adapter and raise the water pressure
to the specified pressure.
3. Check the radiator for water leaks.
4. For water leak from the pinhole, replace the radiator or repair with
the radiator cement. When water leak is excessive, replace the
radiator.
Radiator water leakage
Factory spec.
test pressure
Thermostat Valve Opening Temperature
1. Suspend the thermostat in the water by a string with its end
inserted between the valve and seat.
2. Heating the water gradually, read the temperature when the
valve opens and leaves the string.
3. Continue heating and read the temperature when the valve
opens approx. 6 mm (0.236 in.).
4. If the measurement is not within the factory specifications,
replace the thermostat.
Thermostat's valve
Factory spec.
opening temperature
Temperature at which
thermostat completely Factory spec.
opens
S-93
DIESEL ENGINE
No leak at 137 kPa
2
1.4 kgf/cm
20 psi
W10389070
69.5 to 72.5 °C
157.1 to 162.5 °F
85 °C
185 °F
W1035849
KiSC issued 08, 2012 A