Cooling System Flow

DESCRIPTION
The diesel engine cooling system consists of:
^ Cross-flow radiator
^ Belt driven water pump
^ Belt driven mechanical cooling fan
^ Thermal viscous fan drive
^ Fan shroud
^ Radiator pressure cap
^ Vertically mounted thermostat
^ Coolant reserve/recovery system
^ Transmission oil cooler
^ Coolant

OPERATION
The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible. It also maintains normal operating temperature and prevents overheating.
The cooling system also provides a means of heating the passenger compartment and cooling the automatic transmission fluid (if equipped). The cooling system is pressurized and uses a centrifugal water pump on all engines to circulate coolant throughout the system.







Coolant flow circuits for the 5.9L diesel engine are shown.