Fuel and Turbocharger Cooling System

Fuel and Turbocharger Cooling System

The fuel and turbocharger cooling system consists of the following components:

- Coolant expansion tank
- Radiator
- Coolant pump
- Fuel cooler
- Turbocharger actuator cooler
- Coolant hoses

The fuel and turbocharger cooling system is a self-contained cooling system. It is designed to remove some of the heat added by the high-pressure common rail fuel-injection system and the turbocharger actuator. The high-pressure common rail fuel-injection system uses fuel for lubrication and cooling, as well as being the working medium to create the high pressure. This adds a significant amount of heat to the fuel. The fuel cooling system is designed to keep the high-pressure pump inlet and fuel tank return below 70°C (158°F).

The coolant expansion tank is located on top of the turbocharger crossover tube. The coolant expansion tank allows for coolant expansion, system pressurization and de-aeration and serves as the location for service fill.

The radiator is located on the driver side of the cooling module.

The electric coolant pump is located on the driver side of the cooling fan lower shroud.

The fuel cooler is located on top of the turbocharger crossover tube.

The turbocharger actuator cooler is attached to the turbocharger actuator.

Coolant hoses connect the various components.

It is important to make sure the fuel cooling system is bled correctly and the coolant level maintained for optimum performance.

Coolant Flow Diagram

NOTE: Black arrows indicate hot, white arrows indicate cold.