Audi A4 - GUIDE 2008 Manuale Utente

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HOW TO – REPLACE CAM FOLLOWER ON 2005.5-2008 AUDI A4 (B7)
ACKNOWLEDGEMENT: I would like to thank BJ McGee for posting the original photos and providing the
step-by-step instructions on how to replace the cam follower. I used photos posted by him quite
extensively in this document and the process as a general guide with some notations. You can find the
source following this link, http://picasaweb.google.com/BJ.McGee/AudiA4FSICamFollowerInstall#
. I also
used Bentley repair manual for some information, specifically for component locations, torque
specifications and general precautions. Particularly, I pulled the procedure on relieving the pressure in the
fuel pump from that repair manual.
DISCLAIMER: Please use this document as a general guide for replacing the cam follower. I take no
responsibility for any damage that this procedure may cause to you or your vehicle and its components.
Should you have any questions, you can reach me by email, illegititmus@yahoo.com
or by PM on
http://www.audizine.com to “illegitimus”.
Before proceeding, the pressure has to be reduced in the high pressure fuel lines. To do so,
follow the below steps:
- open the fuse box located on the driver’s side of the dash, at the door hinge: price the fuse box
cover with a flathead screwdriver;
- fuse - 28 - from the Fuel Pump (FP) Control Module J538 must be removed before opening fuel
system. Otherwise, the fuel pump will be activated by the drivers door contact switch;
By removing fuse - 28 - , the voltage supply to "terminal 30" for the Fuel Pump (FP) Control
Module J538 is interrupted.
CAUTION!
The fuel injection system is divided into a high pressure section (maximum approximately
110 bar) and a low pressure system (approximately 6 bar).
Before opening high pressure parts, e.g. removing high pressure pump, fuel rail, fuel
injectors, fuel pipes or Fuel Pressure Sensor G247, fuel pressure in high pressure area
must be reduced to a residual pressure of approximately 6 bar. The procedure for this is
as follows.
- High fuel pressure, reducing:
Remove electrical connector - 2 - from Fuel Pressure Regulator Valve N276
Allow engine to idle approximately 10 seconds.
By removing the electrical connector from the Fuel Pressure Regulator Valve N276 in idle,
the fuel pressure is reduced from approximately 50 bar to approximately 6 bar.
The decreasing fuel pressure can be decreased if a Vehicle Diagnosis and Service Syst. VAS
5052 is connected and engine control module is selected. And select display group 140 under
"Read measured value block" function.
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Sommario

Pagina 1

HOW TO – REPLACE CAM FOLLOWER ON 2005.5-2008 AUDI A4 (B7) ACKNOWLEDGEMENT: I would like to thank BJ McGee for posting the original photos and providi

Pagina 2 - PROCEDURE:

To remove the banjo bolt you need to reach from the bottom like in the photo below: Here’s a setup used on the ratchet to reach the banjo bolt by th

Pagina 3

In the setup pictured above the person used a 10" 1/2" drive extension with a 3/8" to 1/2" adapter and a 1/2" to 3/8" a

Pagina 4

12. After all of the bolts removed the pump is still sitting snugly on the valve cover. That’s because of the banjo fitting. Hold the pump and pull on

Pagina 5

15. Cover the valve cover opening with a clean cloth or paper towel to prevent any dirt from getting inside. New and old cam followers side by side

Pagina 6

Here’re my awkward twins: Shall I say that the original cam follower was nearly shot!? I am glad I did replace it. My car has 58k miles on the clock

Pagina 7

Here is a snapshot of the fuel pump. 16. Per Bentley manual it is recommended that you replace the round fuel pump seal. The following photo shows t

Pagina 8

17. Time to put a new cam follower in place. Audi part number for the cam follower (sleeve) is 06D 109 309 C. It cost me $43.20 from dealer. Carefull

Pagina 9

19. Tighten the 12pt banjo bolt to 17Nm or 12.5lb-ft. 20. Tighten the compression fitting on the fuel pump outlet to 25Nm or 18.4lb-ft. Since you wil

Pagina 10

Here’s a picture of the tools I ended up using NOTES:

Pagina 11

Following is the picture of the fuel pump assembly from the Bentley manual. I only noted the important components that you really care about in the pr

Pagina 12

2. Remove the plastic clip holding the flexible low pressure fuel line from the mount on the engine. Then open the clip and slide it along the hose

Pagina 13

3. Using a 10mm wrench carefully remove the bolt holding the bracket. Be careful not to drop the bolt and the washer as they come undone. I suggest

Pagina 14

4. Remove the PCV return plastic hose. The round clips on the end of the hose require you to squeeze the ridged portion at each end, and then caref

Pagina 15

6. Now, to the coolant expansion tank. Disconnect the electric connector from the bottom of the tank. The connector is the same type as those you ju

Pagina 16

8. Remove the fuel relief valve from the side of the pump. To do it, simply twist off the plastic cap and use a 17mm open or closed wrench to undo th

Pagina 17

This shows the input banjo bolt fitting on the left, and the output compression fitting of the line to the fuel rail on the right. Note the complete

Pagina 18

The fitting is off and the line is out of the pump fitting: 10. Now, using 12-point 8mm torx bit remove the banjo bolt from the pump

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