Coolant Under Temperature; Coolant Contaminated - NC HT1.0 Original Instructions Manual

CHART D3—Coolant under temperature
Cause
Air flow across radiator excessive.
Temperature gauge sensor faulty.
Thermostat faulty, open (not sealing)
Coolant not flowing by temperature sensor.
A total coolant loss may result in the gauge
showing a low temperature initially.
CHART D4—Coolant contaminated
Cause
Coolant rusty, operating without the correct
mixture of antifreeze and water.
Lubricating oil leaks from lubricating oil
cooler, head gasket, head and cylinder block.
Fault Finding
Check/repair the mesh grill on the bonnet.
Check/repair the fan shroud, anti recirculation sealing.
Check fan blades replace if necessary.
Verify that the gauge and temperature sensor are correct.
Check/replace thermostat.
Check coolant level.
Check/clean coolant passages.
Drain and flush the cooling system. Fill with the correct mixture of
antifreeze and water.
Review the coolant interval change.
Refer to Chart D1.
Remedy
Remedy
79