|
|
- Coolant hoses or tubes
- Hose clamps
- Coolant pump O-ring seal or gasket
- Thermostat O-ring seal or gasket
- Thermostat housing
- Radiator
- Degas bottle
- Pressure relief cap
- Water pump leaking from weep hole
- Heater core
- Engine gaskets (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) sensor (if equipped)
- Cylinder head temperature (CHT) sensor (if equipped)
- Heater core
- Water pump
- Coolant flow restriction
|
|
- The engine does not reach normal operating temperature
|
- Low coolant level
- Thermostat
- Electric cooling fan always on
- Engine coolant temperature indicator system (gauge)
- ECT sensor (if equipped)
- CHT sensor (if equipped)
|
|
- The block heater does not operate correctly
|
|
- CHECK continuity in all 3 power cable circuits. If any circuit measures greater 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. See BLOCK HEATER REMOVAL/INSTALLATION - 2.5L
or BLOCK HEATER REMOVAL/INSTALLATION - 3.0L01-12B-18.
|
- The electric cooling fan(s) is inoperative in one or more speeds or does not operate correctly (if equipped)
|
- Wiring
- Relays
- Fuses
- Fan Control (FC) module
- Cooling fan motor(s)
- Cooling fan resistor(s)
|
|
- The electric cooling fan(s) stay(s) on all the time (if equipped)
|
|
|
| Noisy electric cooling fan operation |
- Foreign material contamination
- Fan motor
- Fan blade detached from 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.
- INSTALL a new cooling fan assembly.
|
- Fan motor
- Fan blade detached from fan motor
|
- INSTALL a new cooling fan assembly.
|