6.7L Cummins Diesel Engine Cooling Description
Cooling / OperationOPERATION
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 source of hot coolant for heating
the passenger compartment and cooling the automatic transmission fluid (if
equipped). The cooling system is pressurized and uses a centrifugal water pump
to circulate coolant throughout the system. When engine is cold the thermostat is closed. The cooling system has no flow
through the radiator. The coolant flows through the engine, water pump, and
When engine is warm the thermostat is full open. One the gas engine coolant
flows through the engine, radiator, heater, and water pump.
All engines utilize an ambient overflow bottle for coolant
An optional factory installed maximum duty cooling pack…