Removing and installing circulation pump V55: Audi A6 C6

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Special tools named: 3094

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• Secure all hose connections with standard clamps Electronic parts catalogue.
• Following installation, check the exhaust pipe, coolant hoses, fuel pipe and wiring to the auxiliary heater (must not make contact with other components).

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Switch off ignition and auxiliary heater.
2. Remove the front bumper cover General body repairs, exterior63.
3. If fitted, remove the auxiliary radiator Engine, mechanics19.
4. ⚠ Wear safety goggles. — Drill out the shear bolts (arrows) with a ∅ 3 mm bit.
5. Screw a commercially available size 3 left-hand removal tool for example into the hole of the shear bolt.

6. Use the left-hand removal tool to screw out the shear bolt.
7. Detach the front protective cover (A).
8. Screw out the bolts (arrows).
9. Detach the rear protective cover (A) from the auxiliary heater.
10. Pinch off the coolant hoses (C) and (D) with hose clamps 3094.
11. Detach the coolant hoses at the circulation pump V55.
12. Unplug the connector (A) at the auxiliary heater.
13. Screw out the bolt (arrow) and detach the clip and the circulation pump V55(Item B). [Note: Secure all hose connections with standard clamps Electronic parts catalogue.]
14. Following installation, check the exhaust pipe, coolant hoses, fuel pipe and wiring to the auxiliary heater (must not make contact with other components).
15. After installing the noise insulation, check the position of the exhaust pipe (A). There must be a gasket (B) fitted between the exhaust pipe and the noise insulation. The exhaust pipe must project downwards out of the gasket and the emergence of exhaust gas from the exhaust pipe (A) must not be impeded.
16. Top up coolant Engine, mechanics19.
17. Bleed the coolant circuit and Engine, mechanics19.
18. Install the front bumper cover General body repairs, exterior63.
19. Briefly switch on the auxiliary heater.

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