Removing and installing timing chain cover (top right): Audi A6/A7 C7 (CDTA, CDTB, CDTC, CDUC, …)

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018)

Don't miss

• Disregard (item 2).
• Risk of eye injury.Wear safety goggles. — Remove remaining sealant on timing chain cover (1) and cylinder head using rotating plastic brush or similar.
• Note the use-by date of the sealant.
• Cut off nozzle of tube at front marking (nozzle ∅ approx. 1.5 mm).
• The timing chain covers must be installed within 5 minutes after applying the sealant.

🔧 Engine codes this applies to

📋 Procedure

1. Remove plenum chamber partition panel General body repairs, exterior50Bulkhead; Exploded view - plenum chamber partition panel.
2. Remove cylinder head cover (right-side) .
3. Remove bolts (2 and 3).
4. Release hose clip (1) and detach air pipe.
5. Press air pipe to rear.

6. Remove bolt (1) on intermediate pipe. [Note: Disregard (item 2).]
7. Release clip (3) and detach air hose.
8. Remove bolts (arrows).
9. Pull air pipe off bypass valve at right and guide intermediate pipe (1) out of turbocharger at same time.
10. Press air pipe to the side.
11. Unscrew bolts (arrows) and detach bracket (1).
12. Open clip (1) and detach bypass valve (2).
13. Loosen bolts in the sequence (7 ... 1).
14. Carefully release timing chain cover (top) from bonded joint and remove cover.
15. Remove old sealant from sealing surfaces on timing chain cover.
16. ⚠ Risk of eye injury.Wear safety goggles. — Remove remaining sealant on timing chain cover (1) and cylinder head using rotating plastic brush or similar.
17. Clean surfaces; they must be free of oil and grease. [Note: Note the use-by date of the sealant.]
18. Cut off nozzle of tube at front marking (nozzle ∅ approx. 1.5 mm).
19. Fit gasket (1).
20. Apply sealant at joints between cylinder head and timing chain cover (bottom) (arrow), as shown in illustration.
21. ⚠ Make sure lubrication system is not clogged by excess sealant.The bead of sealant must not be thicker than specified. — Apply sealant beads (1 and 2) onto clean sealing surface of timing chain cover (right-side), as illustrated. [Note: The timing chain covers must be installed within 5 minutes after applying the sealant.]
22. Fit timing chain cover and tighten bolts .
23. Install air pipe .
24. Install coolant pipe (top) .
25. Install exhaust gas temperature sender 4G648.
26. Install cylinder head cover (right-side) .

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