Removing and installing drive chain for oil pump and balance shaft — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: locking pin

Don't miss

• Mark running direction of chain for oil pump and balance shaft with paint.
• Screw in bolts (arrows) for chain sprocket, but do not tighten.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📐 20 workshop diagrams for ASB

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Release quick-release fasteners (1) and (2) and take off front and rear noise insulation.
2. Place used oil collection and extraction unitV.A.G 1782 under engine.
3. Drain off engine oil.
4. Remove engine .
5. Separate engine from gearbox .

6. Secure engine to engine and gearbox support , or leave engine on scissor-type assembly platformVAS 6131 A.
7. Remove drive plate .
8. Remove timing chain covers .
9. Attach special wrench T40049 at rear end of crankshaft using two old securing bolts for drive plate.
10. Lay a cloth beneath sump (top section) to catch engine oil.
11. Unscrew plug from sump (top section).
12. ⚠ To avoid any risk of injury, do not rotate the crankshaft while feeling for the TDC hole with your finger. — Screw locking pin3242 into bore (20 Nm); if necessary, turn crankshaft (1) backwards and forwards slightly to fully centralise locking pin. — 20 Nm (15 lb-ft)
13. Mark running direction of chain for oil pump and balance shaft with paint.
14. Lock balance shaft with diesel injection pump locking pin3359 and loosen bolts (arrows) for balance shaft sprocket.
15. Wrap insulating tape around tip and shaft of 3.3 mm ∅ drill bit to avoid cuts.
16. Press guide rail of chain tensioner in direction of (arrow) and lock chain tensioner by inserting 3.3 mm ∅ drill bit (item 1).
17. Remove bolts (2), (4) and (5) and take out chain tensioner, balance shaft sprocket (3) and chain.
18. Lock balance shaft (arrow) with diesel injection pump locking pin3359
19. Install chain tensioner with chain and balance shaft sprocket.
20. Tighten bolts (2), (4) and (5) for chain tensioner.
21. Screw in bolts (arrows) for chain sprocket, but do not tighten.
22. Pull drill bit out of locating hole to release chain tensioner.
23. Press against guide rail of chain tensioner using a screwdriver, and at the same time tighten bolts securing chain sprocket.
24. Pull diesel injection pump locking pin3359 out of balance shaft.
25. Install timing chain covers .
26. Install drive plate .
27. Bolt gearbox to engine and install engine/gearbox assembly .
28. Fill up with engine oil and check oil level .

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