Removing and installing high-pressure pump - vehicles up to 10.2005 — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Renewed: gaskets

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• Loosen central nut (1) for high-pressure pump shaft using counterhold tool3036.
• Loosen central bolt (1) for toothed belt drive sprocket approx. 2 turns using counterhold tool3036.
• Renew gaskets and seals.
• The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. — Install toothed belt for high-pressure pump.

🔧 Engine codes this applies to

📐 20 workshop diagrams for ASB

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

📋 Procedure

1. ⚠ Rules for cleanliness when working on the injection system . — 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.
5. Remove bottom section of intake manifold (left-side): vehicles up to 08.2004 ; vehicles from 08.2004 onwards .

6. Remove bolt (arrow) for tensioning roller and take off tensioning roller.
7. Loosen central nut (1) for high-pressure pump shaft using counterhold tool3036.
8. Remove damper weight.
9. Loosen central bolt (1) for toothed belt drive sprocket approx. 2 turns using counterhold tool3036.
10. Use puller3032 to pull off toothed belt drive sprocket.
11. Take off toothed belt drive sprocket together with toothed belt.
12. Use puller T40064 to pull off belt sprocket for high-pressure pump.
13. Remove bolts (arrows) and detach toothed belt cover (rear).
14. Remove bolts (arrows) and take off connecting pipe for exhaust gas recirculation.
15. Disconnect fuel supply line (2) and fuel return line (1) from high-pressure pump and move lines clear to the side.
16. Unplug electrical connector (1).
17. Remove bolts (arrows).
18. Take off high-pressure pump together with front bracket.
19. Remove bolts (arrows).
20. Detach front bracket from high-pressure pump. [Note: Renew gaskets and seals.]
21. ⚠ The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. — Install toothed belt for high-pressure pump.
22. Install bottom section of intake manifold (left-side).
23. Install intake manifold (top section) .
24. Bleed fuel system and check for leaks .

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