Removing and installing intake manifold (bottom section) - vehicles up to 08.2004 — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Special tools named: 3150
• Renewed: seals

Don't miss

• Disregard (item 1).
• Disregard items (1) and (4).
• Block off intake ports in cylinder head with clean rags.
• Hand-tighten union nuts on high-pressure pipes. Make sure that connections are not under tension.

🔧 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. Remove engine cover panel .
2. ⚠ Observe rules for cleanliness when working on the injection system . — Unscrew union nuts (arrows) and detach high-pressure pipes.
3. Remove intake manifold (top section) .
4. Unscrew retaining pin (2) for engine cover panel at intake manifold (bottom section). [Note: Disregard (item 1).]
5. If fitted, remove exhaust gas recirculation cooler change-over valve N345(item 1).

6. Take electrical connector (3) for exhaust gas temperature sender 1G235 out of bracket.
7. Remove bolt (2). [Note: Disregard items (1) and (4).]
8. Unplug electrical connectors at glow plugs on cylinder bank (right-side).
9. Detach electrical connector (1) at intake manifold flap motor.
10. Remove bolts (arrows) and detach intake manifold (bottom section) with intake manifold flap motor. [Note: Block off intake ports in cylinder head with clean rags.] [Note: Renew seals and gaskets. Fit all cable ties in the original positions when installing.]
11. Install intake manifold (top section) .
12. Hand-tighten union nuts on high-pressure pipes. Make sure that connections are not under tension.
13. To tighten union of high-pressure pipe at high-pressure pump, use torque wrenchV.A.G 1331 with socket insert AF 14, flared ring spannerV.A.G 1331/8.
14. To tighten unions of high-pressure pipes to fuel rail, use torque wrenchV.A.G 1331 with ratchetV.A.G 1331/1 and socket (14 mm)3150.
15. Check fuel system for leaks .

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