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COOLING SYSTEM COOLING SYSTEM DIAGNOSIS - DIESEL ENGINE CONDITION POSSIBLE CAUSES CORRECTION TEMPERATUREGAUGE READS 1. Vehicle is equipped with a 1. None. System operating norma- 2. Temperature gauge not connect- 2. Connect gauge. 3. Temperature gauge connected 3. Check gauge. Refer (Refer to 8 4. Coolant level low. 4. Fill cooling system. (Refer to 7 - TEMPERATURE GAUGE READS 1. Vehicle overloaded, high ambi- 1. Temporary condition, repair not 2. Temperature gauge not function- 2. Check gauge. (Refer to 8 - 3. Air traped in cooling 3. Drain cooling system (Refer to 7 4. Radiator cap faulty. 4. Replace radiator cap. 5. Plugged A/C or radiator cooling 5. Clean all debre away from A/C 6. Coolant mixture incorrect. 6. Drain cooling system (Refer to 7 7. Thermostat stuck shut. 7. Replace thermostat. 8. Bug screen or winter front being 8. Remove bug screen or winter 9. Viscous fan drive not operating 9. Check viscous fan (Refer to 7 - 10. Cylinder head gasket leaking. 10. Check for leaking head gaskets 11. Heater core leaking. 11. Replace heater core. 12. cooling system hoses leaking. 12. Tighten clamps or Replace 7 - 2 COOLING VA |