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Diesel Engine Troubleshooting Symptoms
38
Coolant Temperature above Normal
This is symptom tree T-016.
Cause Correction
Coolant level is below specification
Inspect the engine and radiator for external
coolant leaks.
OK
Fan belt is slipping or the fan pulley is worn
Replace the fan belt or pulley.
OK
Water temperature gauge is malfunctioning
Replace the water temperature gauge.
OK
Radiator fin is clogged or crushed
Clean, repair, or replace the radiator.
OK
Radiator core is clogged
Clean and repair the radiator.
OK
Thermostat is defective and does not open
Replace the thermostat.
OK
Water pump is damaged
Replace the water pump.
OK
Cylinder head or head gasket is cracked or
damaged
Replace the cylinder head or graket.