COOLING SYSTEM TROUBLESHOOTING
ENGINE MECHANICAL
| NOTE: | This is GENERAL information. This article is not intended to be specific to any unique situation or individual vehicle configuration. The purpose of this Troubleshooting information is to provide a list of common causes to problem symptoms. For model-specific Troubleshooting, refer to SUBJECT, DIAGNOSTIC, or TESTING articles available in the section(s) you are accessing. |
COOLING SYSTEM TROUBLESHOOTING
| CONDITION & POSSIBLE CAUSE | CORRECTION | |
|---|---|---|
| Overheating | ||
| Coolant Leak | Fill/Pressure Test System | |
| A/C Condenser Fins Clogged | Remove/Clean Condenser | |
| Radiator Fins Clogged | Remove/Clean Radiator | |
| Thermostat Stuck Closed | Replace Thermostat | |
| Clogged Cooling System Passages | Clean/Flush Cooling System | |
| Water Pump Malfunction | Replace Water Pump | |
| Fan Clutch Malfunction | Replace Fan Clutch | |
| Retarded Ignition Timing | Reset Ignition Timing | |
| Cooling Fan Malfunction | Test Cooling Fan/Circuit | |
| Cooling Fan Motor Malfunction | Test Fan Motor | |
| Cooling Fan Relay Malfunction | Test Fan Relay | |
| Faulty Radiator Cap | Replace Radiator Cap | |
| Broken/Slipping Fan Belt | Replace Fan Belt | |
| Restricted Exhaust | Repair Exhaust System | |
| Corrosion | ||
| Impurities In Coolant | Clean/Flush System | |
| Coolant Leakage | ||
| Damaged hose | Replace Hose | |
| Leaky Water Pump | Replace Water Pump | |
| Damaged Radiator Seam | Replace/Repair Radiator | |
| Leaky Thermostat Cover | Replace Thermostat Cover | |
| Cylinder Head Problem | Check Head/Head Gasket | |
| Leaky Freeze Plugs | Replace Freeze Plugs | |
| Recovery System Inoperative | ||
| Loose and/or Defective Radiator Cap | Replace Radiator Cap | |
| Overflow Tube Clogged and/or Leaking | Repair Tube | |
| Recovery Bottle Vent Restricted | Clean Vent | |
| No Heater Core Flow | ||
| Collapsed Heater Hose | Replace Heater Hose | |
| Plugged Heater Core | Clean/Replace Heater Core | |
| Faulty Heater Valve | Replace Heater Valve | |
