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Removing and installing safety valve: Audi 1.6 (CHGA)

Step-by-step removing and installing safety valve for the Audi 1.6 (CHGA): 12 steps. What to remove, in what order, and what to check after.

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

12 steps 1 engine code

🧭 Before you start

Fits: platform code 2C0

  • Renewed: seal

Don't miss

  • Always renew the seal on the pressure relief valve.

🔧 Engine codes this applies to

📋 Procedure

  1. Removing the fuel tank (Autogas) .
  2. Draining fuel tank (Autogas)
  3. Removing the upper cover .
  4. Removing the lower cover .
  5. ⚠ There is a danger of injury due to escaping gas.The system is pressurised.Wear suitable protection such as eye protection and protective gloves.Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection. — Remove bolts (arrows).
CHGA? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Pull the pressure relief valve out of the fuel tank.
  2. "“OP▲Top”" must be at top.
  3. Always renew the seal on the pressure relief valve.
  4. Tighten bolts (arrows) in diagonal sequence.
  5. Seal covers .
  6. Carry out leakage test .
  7. Carry out a gas system test (GAP) once installation is complete 39.

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.