Timing chain replacement: Audi A6_4F_2.4 05.2005 (BDW)

🧭 Before you start

Fits: platform codes 2.4, V6

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

Don't miss

• The cover must be fitted within 5 minutes of applying the sealant
• Ensure the balance shaft gearwheel can rotate freely
• When tightening, always use the tool to counterhold

🔧 Engine codes this applies to

📐 22 workshop diagrams for BDW

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

📋 Procedure

Preparation and removal

1. When tightening, always use the tool to counterhold
2. Vehicles with automatic transmission
3. Remove the gearbox
4. Remove the engine upper cover
5. Disconnect the electrical connector from the coolant expansion tank

6. Remove the ignition coils
7. Remove the valve cover
8. Remove the combination valve
9. Left-hand bank:
10. Remove the upper left timing chain cover
11. Remove the air inlet hose
12. Disconnect the ignition coils
13. Remove the ignition coils
14. Remove the valve cover
15. Right-hand side:
16. Remove the upper right timing chain cover
17. Remove the oil filter housing
18. Remove the plug
19. Remove the camshaft gearwheels
20. Remove the chain tensioner
21. Check that the camshaft locking tool can be fitted
22. Check that the crankshaft locking tool can be fitted
23. Fit the tensioner locking pin
24. Remove the balance shaft gearwheel
25. Compress the tensioner
26. Fit the tensioner locking pin
27. Remove the timing chain and gearwheels together

Installation and checks

28. Tensioner locking pin:
29. Check that the crankshaft locking tool is in position
30. Camshaft locking tool:
31. Refit the chain tensioner
32. Spark plug removal tool:
33. Clean off the old sealant
34. Note: The cover must be fitted within 5 minutes of applying the sealant
35. Note: Release the tensioner slowly
36. Ensure the balance shaft gearwheel can rotate freely
37. Note: The cover must be fitted within 5 minutes of applying the sealant
38. Note: Apply sealant before fitting
39. Remove the tensioner locking pin
40. Use a new bolt
41. Before fitting a tensioner:
42. Fit the tensioner locking pin
43. Refit the camshaft gearwheels and chain
44. Note: Use new bolts
45. Stage 2:
46. Left-hand bank:
47. Tighten the inlet camshaft gearwheel
48. Keep tension on the inlet camshaft gearwheel
49. Tighten the inlet camshaft gearwheel
50. Tighten the exhaust camshaft gearwheel
51. Repeat for right-hand bank
52. Remove all the locking tools
53. Refit all parts in the reverse order of removal

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