Checking and modifying adapter for checking residual pressure in natural gas tank — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020)

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• Use a suitable tool to counterhold at connection (2).
• At the same time, counterhold using a suitable tool.

🔧 Engine codes this applies to

🔩 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. ⚠ Before using the adapter for checking residual pressure in natural gas tank, it is important to check that you have the correct version of this tool.Older versions of the adapter for checking residual pressure in natural gas tank must not be used and must be modified.Only the adapterV.A.G 1274B/12 A may be used. All other adapters must be modified.Adapters with pressure relief valve must be modified .Identifying different versions .Modifying adapter for checking residual pressure in natural gas tank. — Observe safety precautions .
2. Observe rules for cleanliness .
3. Observe safety precautions when working on the natural gas system .
4. Carefully loosen and remove union nut (2).
5. Use a suitable tool to counterhold at connection (2).

6. Detach spacer ring from connection (1).
7. Fit filter strainer (2) in adapter (1).
8. Fit supplied seal (3) in adapter (1).
9. Attach spacer ring (4) to threaded section of adapter (5).
10. Screw adapterV.A.G 1274B/12 A-1(1) onto adapter (5) and tighten to 20 Nm. — 20 Nm (15 lb-ft)
11. At the same time, counterhold using a suitable tool.
12. Connect modified adapter to fuel tank shut-off valve and perform a leak test .

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