Removing and installing camshaft - cylinder head (left-side) — AUDI

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: T40094/2, T40094/1, T40096
• Renewed: camshaft oil seal

Don't miss

• Loosen bolt (1) for toothed belt drive sprocket approx. 2 turns using counterhold tool3036.
• Disregard (arrows).
• Make sure you do not damage roller rocker fingers and compensation elements when removing camshafts.
• Renew sealing cap (front) on cylinder head (right-side).
• Risk of eye injury.Wear safety goggles. — Remove remaining sealant from cylinder head and retaining frame using rotating plastic brush or similar.

🔧 Engine codes this applies to

📋 Procedure

1. Remove timing chain from camshaft on relevant side .
2. Remove intake manifold (top section) 23.
3. Remove toothed belt for high-pressure pump 23.
4. Loosen bolt (1) for toothed belt drive sprocket approx. 2 turns using counterhold tool3036.
5. Remove toothed belt drive sprocket using puller T10320.

6. Remove cylinder head cover (left-side) .
7. Detach change-over valve for exhaust gas recirculation cooler N345(item 1) from bracket.
8. Remove bolt (4) and mounting pin for engine cover panel (2).
9. Move electrical wiring harness (3) clear at coolant pipe (top left). [Note: Disregard (arrows).] [Note: Observe rules for cleanliness .]
10. Remove union nut (1) for high-pressure pipe.
11. Remove bolts (arrows) and remove fuel rail from cylinder head (left-side).
12. Slacken retaining frame bolts and nuts in the sequence (18 ... 1). [Note: Make sure you do not damage roller rocker fingers and compensation elements when removing camshafts.]
13. Carefully detach retaining frame and camshafts. [Note: Renew sealing cap (front) on cylinder head (right-side).]
14. ⚠ Risk of eye injury.Wear safety goggles. — Remove remaining sealant from cylinder head and retaining frame using rotating plastic brush or similar.
15. Clean sealing surfaces; they must be free of oil and grease.
16. Oil running surfaces of both camshafts.
17. Insert support T40094/2 in position (A).
18. Insert support T40094/1 in position (D).
19. Place exhaust camshaft (1) in supports T40094/1 and T40094/2.
20. Turn exhaust camshaft in such a way that it can be locked in "“TDC”" position using locking device (arrow).
21. Place camshaft fitting tool T40096 on teeth of exhaust camshaft in such a way that the two arms of the tool engage on the two halves of the gear (one in each half, as shown in illustration).
22. Tighten the clamping tool using the knurled wheel so that the faces of the gear teeth are in alignment.
23. Place inlet camshaft (2) in camshaft fitting tool T40094.
24. Slide exhaust camshaft (1) towards inlet camshaft (arrows) until gear teeth engage.
25. Check that camshafts are in correct position:
26. Fit retaining frame (1) on both camshafts.
27. Attach camshaft fitting tool T40095 to camshafts (align arms of bracket as required and tighten knurled nuts (2)).
28. Apply tension to camshafts by tightening the knurled nuts (3) upwards.
29. Check if dowel pins (arrows) are fitted in cylinder head. Install missing dowel pins. [Note: Note the use-by date of the sealant.]
30. Cut off nozzle of tube at front marking (nozzle ∅ approx. 1.5 mm). [Note: For illustration purposes, the retaining frame is shown without the camshafts.]
31. Turn retaining frame upside down.
32. ⚠ Make sure lubrication system is not clogged by excess sealant.The sealant beads must not be thicker than specified. — Apply beads of sealant (arrows) onto clean sealing surfaces of retaining frame as shown in illustration. [Note: The retaining frame must be installed within 5 minutes after applying the sealant.]
33. ⚠ Risk of damage to engine.Ensure that all roller rocker fingers contact the valve ends and compensation elements correctly. — Fit retaining frame together with both camshafts and camshaft fitting tool T40095 onto cylinder head.
34. Tighten bolts for retaining frame .
35. Remove camshaft fitting tool T40095 and T40096. [Note: After installing the retaining frame, wait about 30 minutes for the sealant to dry.]
36. Install fuel rail and high-pressure pipes 23.
37. Install cylinder head cover (left-side) .
38. Renew camshaft oil seal .
39. Install toothed belt for high-pressure pump and intake manifold (top section) 23.
40. Install camshaft timing chains .

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