Removing and installing hydraulic fluid cooler: Audi A6 C6
Step-by-step removing and installing hydraulic fluid cooler for the Audi A6 C6: 24 steps, 2 torque figures.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A6 C6 (4F, 2004–2011)
- Opens: power steering fluid
- Renewed: o-rings
Don't miss
- (Top arrows) can be disregarded.
- Disregard item (2).
- (Arrow) can be disregarded.
- Disregard item (1).
- Renew O-rings.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 4.5 Nm (3.3 lb-ft) | Clamp hydraulic fluid cooler underneath bracket for refrigerant line (2) and tighten bolt… |
| 5 Nm (3.7 lb-ft) | ⚠ Counterhold at hydraulic fluid cooler when attaching hydraulic hoses (3 |
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
- Remove front bumper cover 63.
- Unscrew bolts (arrows) and detach air duct (1) at the bottom.
- Unscrew bolts (bottom arrows) for air ducts (left and right). [Note: (Top arrows) can be disregarded.]
- Unscrew nut (1). [Note: Disregard item (2).]
- Remove bolts (1) and (3).
- Detach air duct (2).
- Slacken off nuts (arrows).
- Unplug electrical connector (1) at ambient temperature sensor G17(item 2). [Note: (Arrow) can be disregarded.]
- Unscrew nuts (3).
- Lay aside circulation pump 2V403 with hoses (arrows) and electrical connector (2) connected. [Note: Disregard item (1).]
- Detach electrical connector (2) for left radiator fan V402 from bracket.
- Unscrew bolts (arrows) and detach air duct.
- Place used oil collection and extraction unitV.A.G 1782 under connection.
- Pinch off hydraulic fluid hoses (arrows) using hose clamps3094 and detach.
- Slacken off nuts (arrows).
- Unscrew nut (arrow) and swivel engine oil cooler on left side slightly to the front.
- Detach hydraulic fluid cooler.
- Secure engine oil cooler again with nut. [Note: Renew O-rings.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
- Install engine oil cooler 17.
- Install front bumper cover 63.
- Fit air duct at the bottom 19.
- Fit left and right air ducts 50.
- Bleeding steering system after repairs
- Checking power steering fluid level (10-cylinder TFSI engine).
Other AUDI procedures
- 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
- Checking Lambda control
- Checking Lambda probe -G39 and Lambda control
- Checking throttle valve positioner -V60
- Checking output stage for ignition coil
- Testing wiring between white diagnostic connector and engine control unit
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.