Removing and installing high-pressure pump - vehicles with engine codes BUG and BUN — AUDI

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

• Renewed: seals

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• Loosen central nut (1) for high-pressure pump shaft using counterhold tool3036.
• 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) Parts catalogue.
• 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 high-pressure pipes .
• Bleed fuel system after installing high-pressure pump .

🔧 Engine codes this applies to

📋 Procedure

1. Remove engine cover panel .
2. ⚠ Observe rules for cleanliness when working on the injection system . — 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 clear to one 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) 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. — Install high-pressure pipes .
14. Install toothed belt for high-pressure pump .
15. Install intake manifold (top section) .
16. Bleed fuel system after installing high-pressure pump .

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