Manual audi

Service Training

Audi 4.2-liter V8 FSI Engine
S elf-Study Program 921603

Audi of America, Inc.
Service Training
Printed in U.S.A.
Printed 07/2006
Course Number 921603
©2006 Audi of America, Inc.
All rights reserved. All information contained in this manual is
based on the latest information available at the time of printing
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Always check Technical Bulletins and the latest electronic
repair information for information that may supersede any
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Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Engine Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Oil Circulation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Air Circulation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Fuel System . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Engine Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Knowledge Assessment . . . . . . . . . . . . . . . . . .. . . . . . . . . 43

The Self-Study Program provides introductory information regarding the design
and function of new models, automotive components or technologies.

Reference

Note

The Self-Study Program is not a Repair Manual!
All values given are intended as a guideline only and refer
to the software version valid at the time of publication of the SSP.
For maintenanceand repair work, always refer to the current technical literature.

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Introduction
The first member of the current Audi V family of engines was the 3.2-liter V6 FSI engine.
Special features of the Audi V-engine family are the 90-degree angle between the cylinder banks and the 90 mm spacing
between the cylinders.
The 4.2-liter V8 FSI engine is also a member of this family.
It isavailable in two versions – a comfort-oriented version (used for the first time in the Audi Q7) and a sporty high-revving
version for the new RS4. A 5.2L V10 FSI will also be available in the near future.

RS4 4.2L V8 FSI High-revving Engine

377_045

1

Introduction
The 4.2-liter V8 FSI engine is supplied in the new Audi Q7
and RS4. In the future, the engine will be used in the Audi
A6and A8.

The following main objectives were set for the
development of the Audi Q7 engine:
– High specific engine power:
● 350 bhp out of 4.2 liters (15 bhp more than MPI

engines)

– High torque: 325 lb. ft. out of 4.2 liters
– Reduction of fuel consumption by approximately 5 %
(at 2000 rpm and 2 bar)
– Short and compact design
Note:
The technical descriptions of this engine...