Cooling System: Notes
DESCRIPTION
The cooling system consists of the following components:
| 1. | Refer to RADIATOR . |
| 2. | Refer to ELECTRIC COOLING FAN . |
| 3. | Refer to WATER PUMP . |
| 4. | Refer to ENGINE COOLANT TEMPERATURE (ECT) SENSOR . |
| 5. | Refer to THERMOSTAT AND HOUSING ASSEMBLY . |
| 6. | Refer to PRESSURIZED COOLANT BOTTLE . |
| 7. | Refer to COOLING SYSTEM PRESSURE CAP . |
| 8. | Refer to POWERTRAIN CONTROL MODULE (PCM) . |
| - | Refer to COOLANT . |
OPERATION
The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible, maintains normal operating temperature and prevents overheating.
The cooling system also provides a means of heating the passenger compartment, cooling the exhaust gases entering the Exhaust Gas Recirculation (EGR) Cooler, and cooling the engine oil. The cooling system also helps heat up the transmission oil by flowing through the transmission oil heater.
The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system. A separate and remotely mounted, pressurized coolant bottle is used. When the engine is cold the thermostat is closed and the cooling system has no flow through the radiator or the transmission oil heater. The coolant flows through the engine, engine oil cooler, water pump, EGR Cooler, and passenger compartment heater core while the thermostat is closed. When the engine is warm the thermostat is full open and coolant will then flow through the radiator and transmission oil heater.