Engine Cooling: Overview

The engine cooling system maintains the engine within an optimum temperature range under changing ambient and engine operating conditions. The system is a pressurized expansion tank system with continuous bleeds to separate air from the coolant and prevent the formation of air locks. The engine cooling system also provides:

• Heating for:
  • The Passenger Compartment
  • The Throttle Body
• Cooling for:
  • The Engine Oil Cooler
  • The Engine
  • The Automatic Transmission Fluid (ATF) Cooler

The primary components of the engine cooling system are the:

• Coolant Pump
• Thermostat
• Radiator
• Electric Cooling Fan
• Coolant Expansion Tank
• Engine Oil Cooler
• Outlet Tube and Heater Manifold
• Connecting Hoses and Pipes

An auxiliary cooler is installed on vehicles in some hot climate markets. The auxiliary cooler is located in front of the radiator.

In vehicle markets subject to very cold climatic conditions, a cylinder block heater can be installed.