75
Fault Finding
CHART D3—Coolant under temperature
CHART D4—Coolant contaminated
Cause
Remedy
Air flow across radiator excessive.
Check/repair the mesh grill on the bonnet.
Check/repair the fan shroud, anti recirculation sealing.
Check fan blades replace if necessary.
Temperature gauge sensor faulty.
Verify that the gauge and temperature sensor are correct.
Thermostat faulty, open (not sealing)
Check/replace thermostat.
Coolant not flowing by temperature sensor.
A total coolant loss may result in the gauge
showing a low temperature initially.
Check coolant level.
Check/clean coolant passages.
Cause
Remedy
Coolant rusty, operating without the correct
mixture of antifreeze and water.
Drain and flush the cooling system. Fill with the correct mixture of
antifreeze and water.
Review the coolant interval change.
Lubricating oil leaks from lubricating oil
cooler, head gasket, head and cylinder block.
Refer to
Chart D1.