Symptom | Possible Sources | Action |
Loss of coolant | * Radiator. | * INSPECT the radiator for leaks. CARRY OUT the Pressure Test Component Tests in this section. INSTALL a new radiator as necessary. REFER to: Radiator (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Water Pump. | * INSPECT the water pump for leaks. CARRY OUT the Pressure Test Component Tests in this section. INSTALL a new water pump or water pump gasket as necessary. REFER to: Water Pump - 2.0L/2.3L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation) / Water Pump - 2.8L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Coolant expansion tank cap or seal. | * CARRY OUT the Coolant Expansion Tank Cap Pressure Test Component Tests in this section. |
* Coolant expansion tank. | * INSPECT the coolant expansion tank for damage. INSTALL a new coolant expansion tank as necessary. REFER to: Coolant Expansion Tank (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Engine oil cooler (if equipped). | * INSPECT the engine oil cooler for leaks. CARRY OUT the Pressure Test Component Tests in this section. INSTALL a new engine oil cooler as necessary. |
* Hose(s) and hose joint(s). | * INSPECT the hose(s) and hose joint(s) for leaks. INSTALL or REPAIR hose(s) and hose joint(s) as necessary. |
* Heater core. | * CHECK the heater core for leaks. |
* Engine. | * CHECK the engine. * CHECK the cylinder head. * CHECK the cylinder block. * CHECK the cylinder head gasket. REFER to: Cylinder Head (303-01A Engine - 2.0L, In-vehicle Repair). |
The engine overheats (signs of coolant boiling) | * Air in system. | * BLEED the cooling system. REFER to: Cooling System Draining, Filling and Bleeding (303-03A Engine Cooling - 2.8L/2.0L/2.3L, General Procedures). |
* Coolant expansion tank cap or seal. | * CARRY OUT the Coolant Expansion Tank Cap Pressure Tests in this section. |
* Coolant expansion tank. | * INSPECT the coolant expansion tank for damage. INSTALL a new coolant expansion tank as necessary. REFER to: Coolant Expansion Tank (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Coolant level and condition. | * CHECK the coolant level and condition. REFILL the cooling system. REFER to: Cooling System Draining, Filling and Bleeding (303-03A Engine Cooling - 2.8L/2.0L/2.3L, General Procedures). CHECK the system for leaks. |
* Coolant concentration. | * REFER to: Specifications (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Specifications). |
* Radiator grille. | * INSPECT the radiator grille for air restrictions and damage. REPAIR as necessary. |
* Water pump. | * CHECK the water pump for leaks. INSTALL a new water pump or water pump O-ring seal as necessary. REFER to: Water Pump - 2.0L/2.3L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation) / Water Pump - 2.8L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Thermostat. | * CARRY OUT the Thermostat Test Component Tests in this section. REFER to: Thermostat - 2.0L/2.3L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation) / Thermostat - 2.8L (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Accessory drive belt. | * CHECK the accessory drive belt for correct operation. REFER to: Accessory Drive (303-05 Accessory Drive, Diagnosis and Testing). |
* Cooling fan motor(s). | * CHECK the operation of the Cooling fan motor(s). INSTALL a new cooling fan as necessary. REFER to: Cooling Fan Motor (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Radiator. | * CHECK the radiator is not blocked. INSTALL a new radiator as necessary. REFER to: Radiator (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Engine. | * CHECK the engine. * CHECK the cylinder head. * CHECK the cylinder block. * CHECK the cylinder head gasket. REFER to: Cylinder Head (303-01A Engine - 2.0L, In-vehicle Repair). |
The engine does not reach normal operating temperature (poor heater output or low temperature gauge indication) | * Engine coolant temperature (ECT) sensor. | * CHECK the ECT sensor for correct operation. REFER to WDS. |
* Thermostat. | * CARRY OUT the Thermostat Test Component Tests in this section. |
* Cooling fan motor(s). | * CHECK the operation of the Cooling fan motor(s). INSTALL a new Cooling fan motor(s) as necessary. REFER to: Cooling Fan Motor (303-03A Engine Cooling - 2.8L/2.0L/2.3L, Removal and Installation). |
* Circuit(s). | * CHECK the circuit(s). REFER to WDS. |