Removing and installing high-pressure pump - vehicles from 10.2005 onwards — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Renewed: seals

Don't miss

• Loosen central nut (1) for high-pressure pump shaft using counterhold tool3036.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ Observe rules for cleanliness when working on the injection system . — Remove engine cover panel .
2. Unscrew union nuts (1 ... 4) and detach high-pressure pipes.
3. Remove intake manifold (top section) .
4. Remove toothed belt for high-pressure pump .
5. Loosen central nut (1) for high-pressure pump shaft using counterhold tool3036.

6. Remove damper weight.
7. Use puller T40064 to pull off belt sprocket for high-pressure pump.
8. Disconnect fuel supply line (2) and fuel return line (1) from high-pressure pump and move lines clear to the side.
9. Remove bolts (1 ... 4).
10. Remove bolts (1) and (3).
11. Unplug electrical connector (2).
12. Carefully pull toothed belt cover in direction of (arrow) and lift out high-pressure pump. [Note: Renew seals and gaskets.Hose connections and hoses for charge air system must be free of oil and grease before assembly.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
13. ⚠ 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. — Hand-tighten union nuts on high-pressure pipes. Make sure that connections are not under tension.
14. To tighten unions of high-pressure pipes to fuel rail, use torque wrenchV.A.G 1331 and open end spanner insert, AF 19V.A.G 1331/5.
15. To tighten union of high-pressure pipe at high-pressure pump, use torque wrenchV.A.G 1331 with ratchetV.A.G 1331/1 and socket T40055, 17 mm.
16. Install toothed belt for high-pressure pump .
17. Install intake manifold (top section) .
18. Bleed high-pressure pump .
19. Bleed fuel system and check for leaks .

Other AUDI procedures

• Removing and installing tandem pump – Audi A6 C5 · 2 torque figures
• Renewing valve stem oil seals with cylinder head removed
• Separating engine and automatic gearbox · 1 torque figures
• Removing and installing fuel delivery unit (left-side) with fuel system pressurisation pump G6
• Removing and installing fuel delivery unit (right-side) with fuel pump G23
• 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