Symptom Table: Notes
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TABLE
| Condition |
Possible Sources |
Action |
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- Coolant hoses or tubes
- Hose clamps
- Coolant pump O-ring seal or gasket
- Thermostat O-ring seal or gasket
- Thermostat housing
- Radiator
- Transmission fluid cooler (in radiator) (if equipped) (may leak internally or externally)
- Degas bottle (if equipped)
- Coolant expansion tank (if equipped)
- Pressure relief cap
- Coolant pump leaking from weep hole
- Auxiliary coolant pump (if equipped)
- Heater core
- Heater control valve (if equipped)
- Coolant crossover manifold assembly (if equipped)
- Engine gaskets (may leak internally or externally)
- Oil cooler (if equipped) (may leak internally or externally)
- Heated throttle body or heated throttle body adapter (if equipped)
- Heated positive crankcase ventilation (PCV) (if equipped)
- Fuel pressure regulator coolant bowl (if equipped)
- Cylinder block core plugs (if equipped)
- Cylinder head core plugs (if equipped)
- Block heater (if equipped)
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- 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 (if equipped)
- Mechanical cooling fan (if equipped)
- Mechanical cooling fan clutch (if equipped)
- Radiator
- Thermostat
- Engine coolant temperature indicator system (gauge)
- Engine coolant temperature (ECT) sensor (if equipped)
- Cylinder head temperature (CHT) sensor (if equipped)
- Heater core
- Coolant pump
- Coolant flow restriction
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- The engine does not reach normal operating temperature
|
- Low coolant level
- Thermostat
- Mechanical fan clutch always engaged
- Electric cooling fan always on
- Engine coolant temperature indicator system (gauge)
- ECT sensor (if equipped)
- CHT sensor (if equipped)
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- The block heater does not operate correctly
|
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- CHECK continuity in all 3 power cable circuits. If any circuit measures greater than 5 ohms, INSTALL a new power cable.
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- 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.
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- The electric cooling fan(s) or electronically controlled fan clutch is inoperative in one or more speeds or does not operate correctly (if equipped)
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- Wiring
- Relays
- Fuses
- Fan control module
- Cooling fan motor(s)
- Cooling fan resistor(s)
- Electric fan clutch
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- The electric cooling fan(s) stay(s) on all the time (if equipped)
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- Noisy electric cooling fan operation (if equipped)
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- 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.
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- Fan blade detached from fan motor
|
- INSTALL a new cooling fan assembly.
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- Noisy mechanical fan operation (if equipped)
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- CARRY OUT the Fan Clutch Test - Minimum Speed Requirement component test.
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