12-cylinder engine (6.0 ltr. 4-valve), mechanics — Checking compression — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

Don't miss

• Using the compression tester Operating instructions.

🔧 Engine codes this applies to

📋 Procedure

1. Switch off ignition.
2. Use screwdriver to pry off cover (right-side) at dash panel (arrow).
3. Remove injector fuseSC29 at relay and fuse holder (right-side of dash panel, position (29)).
4. Remove side sections of intake manifold: vehicles in rest-of-world Removing and installing left section of intake manifold or Removing and installing right section of intake manifold; USA vehicles Removing and installing left section of intake manifold or Removing and installing right section of intake manifold.
5. Unplug electrical connectors (1) on ignition coils (2).

6. Disconnect the ignition coils from the spark plugs using puller T10166.
7. Remove spark plugs with spark plug socket 3122 B.
8. Test the compression pressure with the compression tester V.A.G 1763. [Note: Using the compression tester Operating instructions.]
9. Have a 2nd mechanic press down the accelerator pedal completely and simultaneously operate the starter until the pressure no longer increases on the tester display.
10. Install spark plugs and ignition coils (repair group 28).
11. Install side sections of intake manifold: vehicles in rest-of-world Removing and installing left section of intake manifold or Removing and installing right section of intake manifold; USA vehicles Removing and installing left section of intake manifold or Removing and installing right section of intake manifold.
12. Finally, interrogate and erase event memory of engine control unit as entries are stored when fuse is removed and connectors are unplugged (see the separate procedure).

Other AUDI procedures

• Removing and installing camshaft timing chains – Audi A6 C6 · 24 torque figures
• Removing and installing camshafts – Audi · 18 torque figures
• Removing and installing timing chain covers – Audi A8 D3 · 11 torque figures
• Removing and installing camshaft adjuster – Audi · 1 torque figures
• Removing and installing oil filter housing – Audi A8 D3
• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures