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Removing and installing hose connection with thermostat: Audi A4 Cabriolet B6/B7 / A4 B6/B7 (ASB, BKN, BMK, BNG, …)

Step-by-step removing and installing hose connection with thermostat for the Audi A4 Cabriolet B6/B7 / A4 B6/B7: 11 steps.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

11 steps 14 engine codes engine codes merged from 6 documented variants

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

  • Opens: coolant
  • Renewed: o-ring

🔧 Engine codes this applies to

📋 Procedure

  1. Drain off coolant .
  2. Move lock carrier to service position .
  3. Carefully pull engine cover panel off four retaining pins one after the other (arrows).
  4. Remove poly V-belt .
  5. Disconnect coolant hose (1).
ASB? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Unscrew bolts (arrows) and take out hose connection with thermostat. [Note: Renew O-ring.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) Electronic parts catalogue.To ensure that the charge air hoses can be properly secured at their connections, spray rust remover onto the worm thread of used hose clips before installing.]
  2. Clean sealing surface.
  3. Install poly V-belt .
  4. Install lock carrier with attachments 50.
  5. Install bumper cover (front) 63.
  6. Fill cooling system .

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

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Workshop data on this page last updated 20 Sep 2026.