Assessing wear on chain, pulley sets "“I”" and "“II”", bearing "“C”" and suction-jet pump — AUDI

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E), Audi A6 C5 (4B), Audi A8 D3 (4E, 2002–2010), Audi A6 C6 (4F, 2004–2011)

Don't miss

• (Items 1 and 2) can be disregarded.
• (Arrow) can be disregarded.
• If edges of chain pins have become abraded or sharp, or if burrs have formed (due to wear or a slipping chain) (arrow B), chain must be renewed.

📋 Procedure

1. Check that tapered pulleys (arrow) for pulley set "“II”" are smooth with no traces of scoring.
2. Run your finger nail from inside to outside over entire surface of tapered pulley to assess damage on running surface.
3. Perform an additional visual inspection.
4. Run your finger nail from inside to outside over entire surface to assess damage on running surface.
5. Check that tapered pulleys (arrow) for pulley set "“I”" are smooth with no traces of scoring. [Note: (Items 1 and 2) can be disregarded.]

6. Run your finger nail from inside to outside over entire surface of tapered pulley to assess damage on running surface.
7. Perform an additional visual inspection. [Note: (Arrow) can be disregarded.]
8. Run your finger nail from inside to outside over entire surface to assess damage on running surface.
9. Check bearing "“C”"(item 1) for damage:
10. Run your finger nail over the entire running surface to assess the damage on the roller bearings.
11. Also check running surface on pulley set "“I”".
12. Check contact surface (arrow) of oil pipe in suction-jet pump through opening in gearbox housing for scoring, scratches or damage.
13. Check the oil pipe in addition .
14. Check that end faces of chain pins are still convex in shape with round edges (arrow A).
15. If edges of chain pins have become abraded or sharp, or if burrs have formed (due to wear or a slipping chain) (arrow B), chain must be renewed.
16. Also check running surface on pulley set "“I”" and pulley set "“II”".

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