Removing and installing balance shaft assembly with oil pump — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Timing position: the crankshaft or camshaft is set and locked during this job
• Renewed: all bolts, seal

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• Turn over the engine at the central bolt on the crankshaft.
• Loosen bolt on oil pump chain sprocket. Counterhold on central bolt of vibration damper.
• Note different bolt lengths .
• Rotate engine to TDC of No. 1 cylinder by turning central bolt of crankshaft sprocket in normal direction of rotation. Marking on camshaft sprocket and marking on crankshaft must be aligned to TDC of cylinder No. 1 (arrows).
• Marking on chain sprocket of balance shaft (arrow) must be positioned opposite the locating hole. Use locking pin T10027 to lock chain sprocket in this position. Place chain on chain sprocket of balance shaft.

🔧 Engine codes this applies to

📐 67 workshop diagrams for AXX

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

📋 Procedure

1. Remove sump . [Note: Turn over the engine at the central bolt on the crankshaft.]
2. ⚠ The engine must only be turned at the crankshaft, in the direction of normal engine rotation (clockwise). — Set camshaft sprocket to TDC marking by turning crankshaft. Marking on camshaft sprocket must align with arrow on toothed belt cover.
3. Pull off chain guard. Retaining tabs can be released with a small screwdriver (insert in openings (arrows)).
4. Loosen bolt on oil pump chain sprocket. Counterhold on central bolt of vibration damper.
5. Use locking pin T10027 to lock chain sprocket of balance shaft.

6. Use screwdriver to slacken chain rail (arrow) and lock it in position using a 3 mm Allen key (1).
7. Detach oil pump chain sprocket and disengage chain at balance shaft drive.
8. Unscrew bolts and (1 and 2) and remove baffle plate.
9. Loosen bolts (arrows) on balance shaft assembly, working from outside inwards, and then remove balance shaft assembly.
10. Renew all bolts on balance shaft assembly; note different bolt lengths .
11. Renew seal on bolt for balance shaft assembly .
12. Fit intermediate plate onto dowel sleeves on balance shaft assembly as shown (arrows).
13. Install balance shaft assembly with oil pump and intermediate plate. Tighten securing bolts . [Note: Note different bolt lengths .]
14. Install baffle plate. To do so, insert pins in balance shaft assembly (arrows) and tighten bolt (1) and bolts (2) to specified torque , . [Note: Turn over the engine at the central bolt on the crankshaft.]
15. Rotate engine to TDC of No. 1 cylinder by turning central bolt of crankshaft sprocket in normal direction of rotation. Marking on camshaft sprocket and marking on crankshaft must be aligned to TDC of cylinder No. 1 (arrows).
16. Marking on chain sprocket of balance shaft (arrow) must be positioned opposite the locating hole. Use locking pin T10027 to lock chain sprocket in this position. Place chain on chain sprocket of balance shaft.
17. Install oil pump chain sprocket with new bolt and hand-tighten the bolt. [Note: The oil pump chain sprocket can only be installed correctly in one position. When installing, you may ONLY turn the oil pump.]
18. Remove locking pin T10027 and Allen key (1). Secure oil pump chain sprocket. Counterhold on central bolt of vibration damper.
19. Install sump .

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