Engine Cooling - Vehicles With: PHEV (G2856524): 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 coolant expansion tank system with continuous bleeds to separate air from the engine coolant and prevent the formation of air locks. The engine cooling system also provides:

The engine cooling system also provides cooling for the following:

• The oil cooler
  • For additional information, refer to: ENGINE .
• The engine
  • For additional information, refer to: ENGINE .
• The ATF  cooler
  • For additional information, Refer to: TRANSMISSION COOLING - VEHICLES WITH: 8HP45 8-SPEED AUTOMATIC TRANSMISSION AWD .
• The charge air cooler
  • For additional information, refer to: INTAKE AIR DISTRIBUTION AND FILTERING .
• The turbocharger.
  • For additional information, Refer to: TURBOCHARGER .

The engine cooling system also provides heating for the following:

• The passenger compartment.
  • For additional information,

    Refer to: HEATING AND VENTILATION .

    Refer to: ELECTRIC BOOSTER HEATER .

The primary components of the engine cooling system are the:

• Variable coolant pump
• Electric thermostat
• Radiator
• Electric cooling fan
• Coolant expansion tank
• Engine oil cooler
• Auxiliary coolant pump (quantity 5)
• Engine coolant degas separator
• Connecting hoses and pipes
• Charge air cooler
• Charge air coolant pump
• Charge air radiator
• ATF  cooler
• HV  interior heater

In cold climate markets, an optional block heater is available as a Retailer/Authorized Repairer fit accessory. The block heater is located in the cylinder block and is connected to a power supply though an external plug.