Removing and renewing valve stem oil seals with cylinder head installed — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017)

• Special tools named: VAS 5161/23, VAS 5161/12, VAS 5161/3, VAS 5161/10, VAS 5161/11, VAS 5161/6, VAS 5161/5, VAS 5161/8

Don't miss

• Mark original positions of roller rocker fingers and hydraulic compensation elements for reinstallation.
• Make sure valve stem oil seals are not damaged when installing.New valve stem oil seals (B) are supplied with plastic sleeve; fit plastic sleeve (A) onto valve stem. — Lightly oil sealing lip of valve stem oil seal.

🔧 Engine codes this applies to

📋 Procedure

1. Remove all glow plugs .
2. Remove camshafts: cylinder head (left-side) , cylinder head (right-side) .
3. Mark original positions of roller rocker fingers and hydraulic compensation elements for reinstallation.
4. Remove roller rocker fingers together with hydraulic compensation elements and put down on a clean surface.
5. Set piston of appropriate cylinder to "“bottom dead centre”".

6. Fit guide plate VAS 5161/23 onto cylinder head.
7. Secure guide plate with knurled screws VAS 5161/12.
8. Apply drift VAS 5161/3 to guide plate and use plastic-headed hammer to release sticking valve cotters.
9. Screw sealing pin VAS 5161/10 into guide plate.
10. Screw adapter VAS 5161/11 hand-tight into corresponding glow plug thread.
11. Screw snap-in device VAS 5161/6 with engaging fork VAS 5161/5 into guide plate.
12. Slide knurled spacer ring VAS 5161/23-1 onto assembly cartridge VAS 5161/8.
13. Connect adapter to compressed air line using a commercially available connection piece, and apply constant air pressure.
14. Attach pressure fork VAS 5161/2 to snap-in device and push assembly cartridge down.
15. At the same time, turn knurled screw of assembly cartridge clockwise until tips engage in valve cotters.
16. Move knurled screw back and forth slightly; the valve cotters are thus forced apart and taken up by the assembly cartridge.
17. Release pressure fork.
18. Take off assembly cartridge with knurled spacer ring.
19. Detach valve spring with valve spring plate.
20. Pull off valve stem oil seal with valve stem seal puller3364.
21. Knock out pin (arrow) of puller using a drift and remove impact extractor attachment.
22. Apply bottom section of puller 3364 to valve stem oil seal.
23. Secure puller with a punch or roll-pin drift (1), as shown in illustration.
24. Apply assembly lever to puller and pull out valve stem oil seal (arrow).
25. ⚠ Make sure valve stem oil seals are not damaged when installing.New valve stem oil seals (B) are supplied with plastic sleeve; fit plastic sleeve (A) onto valve stem. — Lightly oil sealing lip of valve stem oil seal.
26. Slide valve stem oil seal onto plastic sleeve.
27. Carefully press valve stem oil seal onto valve guide using valve stem seal fitting tool3365.
28. Take off plastic sleeve.
29. Insert valve spring and valve spring plate.
30. Press assembly cartridge onto insertion device from above and take up valve cotters.
31. Insert assembly cartridge in guide plate VAS 5161/23 again.
32. Press down pressure fork and pull knurled screw upwards while turning screw in both directions - this will insert the valve cotters.
33. Release pressure fork with knurled screw still in pulled position.
34. Repeat procedure for each valve.
35. Install camshafts: cylinder head (left-side) , cylinder head (right-side) .
36. Install glow plugs .

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