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Service Manual Mitsubishi SL-Series diesel engines
Version 08/2004
ENGLISH
INSPECTION COOLING SYSTEM
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35.1 Water pump
Check the impeller and shaft for rotation. If they do not
rotate freely or have noise, replace the water pump
assembly.
35.2 Thermostat (standard)
Hang the thermostat in the pan of water as shown in
the illustration. The thermostat must be below the
surface of the water and its must be away from the
sides of the pan. Heat the water uniformly in the pan
and measure a temperature at which the valve starts
opening and a temperature at which the valve lift
(distance) is 8 mm (0.3 in.). Replace the thermostat if
defective.
Figure 206 Checking water pump
Figure 207 Testing thermostat
Temperature at which
valve starts opening
85 ± 1.5°C
(180 ± 2.7°F)
Temperature at which
valve lift is 8 mm (0.3 in.)
95°C (203°F)
WARNING
Water in the pan is hot. Any contact can cause
severe burns.
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