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Symptom Chart

WARNING: This page is about a different car, the 2005 Lincoln Navigator and 2005 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLE SYMPTOM REFERENCE

Condition Possible Sources Action
  • Loss of coolant
  • Radiator.
  • Coolant pump seal.
  • Radiator hoses.
  • Heater hoses/tubes.
  • Heater core.
  • Engine gaskets.
  • Positive crankcase ventilation (PCV) hose joint.
  • Degas bottle.
 GO to PINPOINT TEST A .
  • The engine overheats
  • Thermostat.
  • Coolant pump.
  • Internal engine coolant leak.
  • Radiator.
  • Cooling fan.
  • Pressure relief cap.
  • The engine does not reach normal operating temperature
  • Thermostat.
  • Cooling fan.
  • The block heater does not operate correctly
  • Block heater power cable.
  • CHECK continuity in all three power cable circuits. If any circuit measures greater than 5 ohms, INSTALL a new power cable.
  • Block heater.
  • INSTALL a new block heater.
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