Symptom Chart
WARNING: This page is about a different car, the 2012 Lincoln Navigator, 2012 Ford Expedition EL, and 2012 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART
| Condition |
Possible Sources |
Action |
|
|
- Coolant hoses or tubes
- Hose clamps
- Coolant pump O-ring seal
- Thermostat O-ring seal
- Thermostat housing
- Radiator
- Transmission fluid cooler (in radiator) (may leak internally or externally)
- Coolant expansion tank
- Pressure relief cap
- Coolant pump leaking from weep hole
- Heater core
- Coolant crossover manifold assembly
- Engine gaskets (may leak internally or externally)
- Oil filter adapter (may leak internally or externally)
- Cylinder block core plugs
- Cylinder head core plugs
- Block heater (if equipped)
|
|
|
|
- Low coolant level
- External engine coolant leak
- Airlock in system
- Pressure relief cap installation
- Restricted airflow through the A/C condenser/radiator
- Internal engine coolant leak
- Coolant condition/concentration
- Accessory drive components
- Non-OEM engine enhancement components
- Electric cooling fan
- Radiator
- Thermostat
- Engine Coolant Temperature (ECT) gauge
- Cylinder Head Temperature (CHT) sensor
- Coolant pump
- Coolant flow restriction
|
|
- The engine does not reach normal operating temperature
|
- Low coolant level
- Thermostat
- Electric cooling fan always on
- ECT gauge
- CHT sensor
|
|
- The block heater does not operate correctly
|
|
- CHECK continuity in all 3 power cable circuits. If any circuit measures more than 5 ohms, INSTALL a new power cable.
|
|
|
- CHECK the resistance of the block heater. If the resistance does not measure between 12.5 and 17.0 ohms, INSTALL a new block heater.
|
- The electric cooling fan is inoperative in one or more speeds or does not operate correctly
|
- Wiring
- Relays
- Fuses
- Cooling fan motor
|
|
- The electric cooling fan stays on all the time
|
|
|
- Noisy electric cooling fan
|
- Foreign material contamination
- Fan motor
|
- REMOVE the foreign material from the cooling fan and shroud. TEST the system for normal operation. If still noisy, INSTALL a new cooling fan assembly.
|
- Fan blade detached from fan motor
|
- INSTALL a new cooling fan assembly.
|