2009 Audi A6 (C6) Service & Repair Manual
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00 - TECHNICAL DATA
SAFETY PRECAUTIONS
Safety Precautions
Note the following when working on the fuel system:
Procedures before opening high pressure fuel injection system --> Before Opening High Pressure Fuel
Injection System .
To prevent personal injury and damage to the injection and ignition system, observe the following:
The ignition must be switched off before connecting or disconnecting injection and ignition system
wiring or tester cables.
Only clean engine with ignition switched off.
If electrical connectors were disconnected, faults are saved in ECM:
Connect Vehicle Diagnosis, Testing and Information System VAS 5051B.
Start "Guided Functions" operating mode.
Generate readiness code in ECM.
Disconnect battery --> 27 - STARTER, GENERATOR, CRUISE CONTROL .
Note the following when working on the cooling system:
CAUTION: There is a risk of injury because the fuel is under very high pressure.
Before opening high pressure area of the fuel injection system, fuel
pressure must be relieved to residual pressure.
To reduce remaining residual pressure, lay a clean cloth around the
connector and carefully loosen connector.
CAUTION: Risk of destroying electrical components when battery is disconnected.
Observe measures when disconnecting battery.
Only disconnect battery with ignition switched off.
CAUTION: Risk of scalding due to hot steam and hot coolant.
When the engine is warm the cooling system is under pressure.
To reduce pressure, cover coolant reservoir cap with cloth and
carefully open.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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If it is necessary to use testing and measuring devices on road tests, observe the following:
Before Opening High Pressure Fuel Injection System
Before Opening High Pressure Fuel Injection System
The fuel injection system is separated into a high-pressure section (max. approximately 120 bar) and a
low-pressure section (approximately 6 bar).
Before opening high pressure area, fuel pressure must be reduced to a residual pressure of approximately
6 bar. The procedure for this is as follows.
Special tools, testers and auxiliary items required
Vehicle diagnostic, testing, and information system VAS 5051B
Procedure
Proceed as follows:
CAUTION: Distraction and improperly secured test equipment can lead to accidents.
Risk of passenger airbag deploying in an accident.
Operating testing and measuring equipment while driving creates a
distraction.
There is an increased risk of injury due to unsecured testing and
measuring equipment.
Always secure testers on the rear seat with a strap and have a
second person on the rear seat operate them.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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Fig. 1: Connecting Vehicle Diagnosis, Testing And Information System VAS 5051B
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Connect vehicle diagnosis, testing and information system VAS 5051B while the ignition is switched off.
Fig. 2: Display On VAS 5051B - Vehicle Self - Diagnosis Button
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Display on VAS 5051B :
Press Vehicle Self-Diagnosis button - 1 - in selection.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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Fig. 3: Display On VAS 5051 - "01 - Engine Electronics"
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Display on VAS 5051B :
In selection - 1 - , press "01 - Engine electronics" vehicle system and continue by pressing button.
Fig. 4: Display On VAS 5051 - "006 - Basic Setting"
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Display on VAS 5051B :
In selection - 1 - , press diagnostic function "006 - Basic setting" and continue by pressing the button.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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Fig. 5: Display On VAS 5051 - "Display Group 140"
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Display on VAS 5051B :
In button field - 1 - , press the 1 4 0 buttons for "Display group 140" and confirm the entry by pressing the
Q button.
Fig. 6: Display On VAS 5051 - (Read - Out For Fuel Pressure In Fuel Rail)
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Display on VAS 5051B :
Example:
1. 42%
2. 39.76 bar
3. 40.63 bar
4. Inactive
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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Fig. 7: Diagnostic System VAS 5051: Display - Display Fields
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Press button A to activate basic setting.
Display on VAS 5051B :
Example:
1. 0%
2. 0 bar
3. 5.46 bar
4. Lower
The fuel rail will continue to be filled with fuel, but it will no longer be under high pressure.
Now components or lines can be opened.
Lay clean cloths around connectors and catch escaping fuel.
Final procedures
Start "Guided Functions" operating mode.
Generate readiness code in ECM.
GENERAL REPAIR INFORMATION
General Repair Information
--> Clean Working Conditions
--> Contact Corrosion
--> Lines, Routing and Securing
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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Clean Working Conditions
Clean Working Conditions
Even a little contamination can lead to faults. When working on the fuel supply and on the fuel injection
system, observe the following guidelines for a clean working environment:
Before loosening, connections and surrounding areas must be cleaned thoroughly with engine or brake
cleaner, and then cleaned area must be dried completely.
Plug open lines and connections immediately with appropriate protective caps.
Place parts that have been removed on a clean surface and cover them. Use lint-free cloths.
Only install clean components: Only unpack replacement parts immediately prior to installation. Do not
use parts that have been stored unpacked (e.g. in tool boxes etc.).
When the system is open: Do not work with compressed air. Do not move vehicle unless absolutely
necessary.
Protect disconnected electrical connectors from dirt and moisture and only connect if dry.
Contact Corrosion
Contact Corrosion
Contact corrosion can occur if incorrect fasteners (bolts, nuts, washers, etc.) are used.
For this reason, only install connecting elements that are treated with a special coating.
Also, rubber or plastic parts and adhesive consist of non-conductive materials.
If there are doubts about the suitability of parts, generally use new parts .
Lines, Routing and Securing
Lines, Routing and Securing
To prevent mistakes and ensure the original installation location is kept, mark the hydraulic lines, vacuum lines
or electrical lines before removing them. If necessary, draw sketches or take pictures.
ENGINE DATA
Engine Data
NOTE:
Only original replacement parts are recommended, they are checked and
compatible with aluminum.
Audi accessories are recommended.
Damage due to contact corrosion is not covered by warranty.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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ENGINE NUMBER
Engine Number
Fig. 8: Identifying Front Engine Cover
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Remove front engine cover - arrows -.
Code letters BKH
Displacement Liter 3.123
Output kW at RPM 188/6500
Torque Nm at RPM 330/3250
Bore Diameter mm 84.5
Stroke mm 92.8
Compression ratio 12.5
RON min. 95 1)
Fuel injection and ignition system Simos
Ignition sequence 1-4-3-6-2-5
Exhaust gas recirculation No
Turbocharger, G-Charger No
Knock control Yes
Variable valve timing Yes
Variable intake manifold No
Secondary Air Injection System No
Valves per cylinder 4
1) Unleaded RON 91 is also permitted, but performance is reduced.
2008 Audi A6 Quattro
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Fig. 9: Identifying "Engine Code" And "Serial Number"
Courtesy of VOLKSWAGEN UNITED STATES, INC.
The engine number ("engine code" and "serial number") is located at front on cylinder block, below the
right cylinder head - arrow 1 -.
Additionally, a sticker - arrow 2 - is affixed to the front coolant line with the "engine code" and "serial
number".
The engine code is also located on the vehicle data plate.
2008 Audi A6 Quattro
ENGINE 3.2 V6 4V Engine Mechanical, Engine Code(s): BKH
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What's Included?
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Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$39.99
Get your hands on the 2009 Audi A6 C6 Service and Repair Manual, your go-to resource for fixing vehicle issues. Whether you're a professional mechanic or a DIY enthusiast, these manuals provide comprehensive instructions and procedures to tackle car problems. The manual includes technical data, diagrams, a complete list of car parts, and images, making it easy for even novice mechanics to follow along. It covers maintenance, engine, control system, mechanical, fuel service specifications, and much more. The repair manual is available in both .PDF and .OVA file formats, compatible with Windows and Mac operating systems. With this manual, you can save time and money by learning to repair different parts of your car on your own. It's a valuable resource that keeps your vehicle in top condition.
- Complete step-by-step instructions, diagrams, and illustrations
- Comprehensive details on technical data, diagrams, and car parts
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- Useful for professional mechanics and DIY enthusiasts
