Removing and installing oil retention valve and spray nozzle valve — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Renewed: gaskets

Don't miss

• Unscrew high-pressure pipes (3 and 8) from connections at fuel rail. To do so, counterhold at hexagon flats with an open-end spanner and slacken union nut.
• Renew gaskets, seals and O-rings.

🔧 Engine codes this applies to

📋 Procedure

1. Remove intake manifold (repair group 24).
2. Remove bolts (1, 4, 5, 6, 7) at retaining clips for high-pressure lines.
3. Unplug electrical connectors at injectors.
4. Unscrew high-pressure pipes (2 and 9) from connections at fuel rail.
5. Unscrew high-pressure pipes (3 and 8) from connections at fuel rail. To do so, counterhold at hexagon flats with an open-end spanner and slacken union nut.

6. Detach high-pressure pipes.
7. Remove bolts (arrows).
8. Detach cover (2) with hose (1) for crankcase breather system.
9. Remove gasket.
10. Pull out oil retention valve (1) and spray nozzle valve (2). [Note: Renew gaskets, seals and O-rings.]
11. Install high-pressure lines 24; procedure described in "“Removing and installing injectors”".
12. Install intake manifold (repair group 24).

Other AUDI procedures

• Checking fuel system for leaks – VW Golf V / Jetta
• Removing and installing coolant pipe (rear right) – Audi A3
• Removing and installing timing chain covers (left and right)
• Removing and installing spur gear drive – VW Touareg I 4.2
• Renewing crankshaft oil seal - belt pulley end – VW Polo 6R · 2 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