Removing and installing toothed belt for high-pressure pump - vehicles from 12.2005 onwards — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Special tools named: T40058

Don't miss

• Before removing, mark rotation direction of toothed belt with chalk or felt-tip pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.
• Before installing toothed belt, make sure high-pressure pump with toothed belt sprocket and toothed belt drive sprocket are firmly secured.
• Do NOT turn tensioning roller up to or beyond "“12 o'clock”" position. — Now release toothed belt tensioning roller (arrow) to such an extent that hexagon socket moves into "3 o'clock" position.
• Do not rotate crankshaft in opposite direction of engine rotation. — Turn crankshaft at least one complete revolution in normal running direction (arrow).

🔧 Engine codes this applies to

📋 Procedure

1. Remove intake manifold (top section) .
2. Loosen clamps (arrows).
3. Pivot toothed belt cover forward and disengage retaining pegs on bottom side of toothed belt cover.
4. Remove toothed belt cover. [Note: Before removing, mark rotation direction of toothed belt with chalk or felt-tip pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.]
5. Unscrew bolt (arrow) and detach tensioning roller.

6. Take off toothed belt first from toothed belt drive sprocket and then from toothed belt sprocket at high-pressure pump. [Note: Before installing toothed belt, make sure high-pressure pump with toothed belt sprocket and toothed belt drive sprocket are firmly secured.]
7. Check installation position of toothed belt tensioning roller:
8. Fit toothed belt.
9. Install toothed belt tensioning roller; to do so, screw in bolt for toothed belt tensioning roller without applying force until eccentric adjuster of toothed belt tensioning roller can just still be turned without axial movement.
10. Tension toothed belt tensioning roller slightly by turning further in direction of (arrow) using hexagon key until hexagon socket is in "1 o'clock" position.
11. ⚠ Do NOT turn tensioning roller up to or beyond "“12 o'clock”" position. — Now release toothed belt tensioning roller (arrow) to such an extent that hexagon socket moves into "3 o'clock" position.
12. Tension tensioning roller slightly from "3 o'clock" position (arrow) until lug (1) and notch (2) are exactly in line.
13. Hold toothed belt tensioning roller in this position and tighten bolt (arrow).
14. Release quick-release fasteners (1) and (2) and take off front and rear noise insulation.
15. Insert guide pin of adapter T40058 with the larger-diameter section (arrow 1) pointing towards the engine. The smaller-diameter section (arrow 2) faces the adapter.
16. ⚠ Do not rotate crankshaft in opposite direction of engine rotation. — Turn crankshaft at least one complete revolution in normal running direction (arrow).
17. Check toothed belt tension.
18. Adjust the toothed belt tension again.
19. Install intake manifold (top section) .

Other AUDI procedures

• Removing and installing fuel gauge sender 3 G237 (tubular sender, left-side)
• Camshaft timing chain - exploded view
• Checking delivery rate of supplementary fuel pump V393
• Exhaust system - exploded view · 4 torque figures
• Moving lock carrier into service position · 1 torque figures
• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures