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Removing and installing non-return valve (cylinder bank 2) — AUDI

Removing and installing non-return valve (cylinder bank 2) on Audi: 10 steps, engines CDUC, CDUD, CGQB, CKVB.

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

10 steps 17 engine codes engine codes merged from 2 documented variants

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017)

  • Opens: coolant

Don't miss

  • Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.

📋 Procedure

  1. Drain coolant .
  2. Remove engine mounting (left-side) .
  3. Unscrew bolts (arrows) and remove engine support (left-side).
  4. Remove bolt (arrow).
  5. Detach non-return valve (1).
CDUC? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove bolts (arrows).
  2. Release hose clip (2) and detach coolant hose.
  3. Detach non-return valve (1). [Note: Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
  4. Install engine support and engine mounting .
  5. Fill up with coolant .

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.