Engine Cooling System: Description: Description: Overview
| 1 - RETURN TUBE | 9 - SECONDARY THERMOSTAT |
| 2 - UPPER PLENUM | 10 - CYLINDER BLOCK |
| 3 - HEATER CORE | 11 -TRANSMISSION OIL COOLER |
| 4 - LOWER PLENUM | 12 - UPPER RADIATOR HOSE |
| 5 - PRIMARY THERMOSTAT | 13 - WATER PUMP |
| 6 - LOWER RADIATOR HOSE | 14 - CYLINDER HEAD |
| 7 - ENGINE OIL COOLER | 15 - COOLING FANS |
| 8 - PRIMARY THERMOSTAT BYPASS | 16 - RADIATOR |
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.
| 1 - RETURN TUBE - GAS ENGINES | 10 - AFTER RUN PUMP |
| 2 - THERMOSTAT | 11 - CYLINDER BLOCK |
| 3 - HEATER CORE | 12 - OIL COOLER |
| 4 - UPPER PLENUM | 13 - COOLING FANS |
| 5 - LOWER PLENUM | 14 - RADIATOR |
| 6 - THERMOSTAT HOUSING | 15 - UPPER RADIATOR |
| 7 - LOWER RADIATOR HOSE | 16 - COOLING FANS |
| 8 - TURBOCHARGER | 17 - CYLINDER HEAD |
| 9 - ORIFICE PLATE |
The cooling system also provides a means of heating the passenger compartment. The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system. Gas engines use a separate and remotely mounted, ambient pressure coolant recovery bottle using a pressure/vent cap. Diesel engine use a separate and remotely mounted, pressurized coolant tank using a pressure/vent cap.
The cooling system consists:
- Radiator
- Coolant
- Electric Cooling Fan
- Water pump
- Dual Thermostat (Gas Engines)
- Charge air cooler (Turbocharged vehicles only)
- Hoses and clamps
- Transmission oil cooler
- Coolant Recovery system