The Audi 4.0l V8 TFSI Engine from the EA825 Series - eSelf Study Program 920493

Oct 2, 2026

Uploaded by Aria

eSelf-Study Program 920493 explains the design and operating principles of the 4.0l V8 TFSI engine from the EA825 series. It covers engine description and special features, including V8 layout, valve timing technology, turbocharging and emission systems, as well as oil supply, cylinder cooling and thermal management. The program also addresses fuel and air supply systems, engine management and control, inspection and maintenance, and knowledge assessment, supporting improved understanding for service and after-sales work.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages88

Reading Time3 h 42 min

AccessFree to download

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

Sensors and actuators

Oil circuit overview

Oil pump

Piston cooling

Oil filter and oil-coolant heat exchanger

Drive for ancillaries

Cooling system

Transmission coolant circuit

Air supply

Intake manifolds

Throttle Valve Control Modules GX3 and GX4

Turbocharging

Twin scroll exhaust manifold

Turbocharger oil and coolant connections

Exhaust system

Fuel system

High-pressure injector

Engine management

Inspection and maintenance

Knowledge assessment

The Audi 4.0l V8 TFSI engine from the EA825 series eSelf Study Program 920493 Audi of America, LLC Service Training Created in the U.S.A. Created 2/2020 Course Number 920493 ©2020 Audi of America, LLC All rights reserved. Information contained in this manual is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of America, LLC., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, nor may these materials be modified or reposted to other sites without the prior expressed written permission of the publisher. All requests for permission to copy and redistribute information should be referred to Audi of America, LLC. Always check Technical Bulletins and the latest electronic service repair literature for information that may supersede any information included in this booklet. | The eSelf-Study Program (eSSP) teaches a basic understanding of the design and mode of operation of new models, new automotive components or new technologies. | | | --- | --- | | It is not a repair manual! Figures are given for explanatory purposes only and refer to the data valid at the time of preparation of the SSP. | | | | | | For further information about maintenance and repair work, always refer to the current technical literature. | | Release Date: February 2020 Introduction 5 Engine description and special features 6 Technical data 7 Engine mechanics 8 Cylinder block 8 Crankshaft 12 Cylinder head 18 Camshaft drive configuration 31 Crankcase ventilation system 36 Positive Crankcase Ventilation (PCV) 41 Fuel tank ventilation 42 Vacuum system 44 Oil supply 46 Oil circuit overview 46 Oil pump 48 Piston cooling 50 Sensors and actuators 51 Oil filter and oil-coolant heat exchanger 53 Oil filter module 54 Oil supply in the cylinder head cover 55 Drive for ancillaries 56 Cooling system 58 System overview 58 Coolant circuit in cylinder block 60 Cooling concept for the cylinder head 62 Transmission coolant circuit 67 Air supply 69 Overview of air ducts 69 Intake manifolds 71 Throttle Valve Control Modules GX3 and GX4 72 Turbocharging 73 Twin scroll exhaust manifold 73 Twin scroll turbochargers 74 Turbocharger mounting 76 Turbocharger oil and coolant connections 77 Heat shield in inner V of engine 78 Exhaust system 79 Fuel system 80 High-pressure injector 81 Engine management 82 System overview 82 Engine Control Module 84 Inspection and maintenance 85 Service information and operations 85 Special tools and workshop equipment 86 Knowledge assessment 87 4 Introduction 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. 676_153 Learning objectives of this eSelf-Study Program: 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 inject

FAQs

What is the purpose of eSelf-Study Program 920493?

It teaches a basic understanding of the design and mode of operation of the EA825 4.0l V8 TFSI engine, including key subsystems relevant to service understanding.

Is this program a repair manual?

No. It is not a repair manual, and figures are provided for explanatory purposes only.

Which systems are covered in the program besides engine description?

The program covers oil supply and engine cooling systems, air supply, turbocharging, fuel system, engine management, inspection and maintenance, and special tools/workshop equipment.

Oct 2, 2026

Uploaded by Aria