Self Study Program 920493 – The Audi 4.0l V8 TFSI engine from the EA825 series

AVG SSP 920493. This eSelf-Study Program describes the function of the 4.0l V8 TFSI engine of the EA825 engine series. Once you have completed this eSelf-Study Program, you will be able to answer the following:

  • What are the technical characteristics of the engine?
  • How do the oil supply and engine cooling systems work?
  • What are the special features of the air supply system?
  • What effect does the improved injection system have?
  • What has changed for after-sales service and maintenance?

The new Audi V8 engine from the EA825 series is a joint development of Porsche and AUDI AG. The engine construction is based on the V6 engine from the EA839 series. This has advantages not only for the manufacturing process; the close relationship has benefits for after sales service as well. For example, many of the special tools can be used for both engines.

The new V8 engines were first introduced by two other Group brands: Bentley and Porsche. At Audi, the new V8 will be installed first in the A8.

The engines are manufactured in the new Porsche engine production facility in Zuffenhausen.


  • Introduction
  • Engine description and special features
  • Technical data
  • Engine mechanics
  • Cylinder block
  • Crankshaft
  • Cylinder head
  • Camshaft drive configuration
  • Crankcase ventilation system
  • Positive Crankcase Ventilation (PCV)
  • Fuel tank ventilation
  • Vacuum system
  • Oil supply
  • Oil circuit overview
  • Oil pump
  • Piston cooling
  • Sensors and actuators
  • Oil filter and oil-coolant heat exchanger
  • Oil filter module
  • Oil supply in the cylinder head cover
  • Drive for ancillaries
  • Cooling system
  • System overview
  • Coolant circuit in cylinder block
  • Cooling concept for the cylinder head
  • Transmission coolant circuit
  • Air supply
  • Overview of air ducts
  • Intake manifolds
  • Throttle Valve Control Modules GX3 and GX4
  • Turbocharging
  • Twin scroll exhaust manifold
  • Twin scroll turbochargers
  • Turbocharger mounting
  • Turbocharger oil and coolant connections
  • Heat shield in inner V of engine
  • Exhaust system
  • Fuel system
  • High-pressure injector
  • Engine management
  • System overview
  • Engine Control Module
  • Inspection and maintenance
  • Service information and operations
  • Special tools and workshop equipment

Language: English
Format: PDF
Pages: 88

Self Study Program 920493 – The Audi 4.0l V8 TFSI engine from the EA825 series