Description And Operation: Notes
DESCRIPTION
| 1 - Radiator | 6 - Water pump |
| 2 - Electric Cooling Fan | - Thermostat |
| 3 - Cooling System Pressure Cap | - Engine Coolant Temperature (ECT) Sensor |
| 4 - Pressurized Coolant Bottle | - Engine Block Heater |
| 5 - Powertrain Control Module (PCM) | - 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, coolant recovery bottle is used. When the engine is cold the thermostat is closed 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, transmission oil heater, 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.