Removing and installing natural gas tanks 1 and 2 — AUDI
Removing and installing natural gas tanks 1 and 2 on Audi: 11 steps, engines BCA, BGU, BSE, BSF. 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.
🧭 Before you start
Fits: VW Caddy III (2K, 2004–2015); platform code 2C0
Don't miss
- Due to limited space, the handwheels for mechanical shut-off valves have been discontinued.Close the mechanical shut-off valves using a commercially available spanner.
- When loosening the high-pressure lines, counterhold on unions with a suitable tool (arrows).
- When the fuel tanks have to be stored temporarily, use bracket T10351 for this purpose.
📐 57 workshop diagrams for BCA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- Remove rear silencer 26.
- Remove protective covers on underbody:
- To remove fuel tanks, separate connectors (1) from tank shut-off valve on all fuel tanks (natural gas).
- Close mechanical shut-off valves (2) and (3) on all natural gas tanks. [Note: Due to limited space, the handwheels for mechanical shut-off valves have been discontinued.Close the mechanical shut-off valves using a commercially available spanner.] [Note: Observe safety precautions when working on natural gas system .The fuel tank 1 is removed together with fuel tank 2.]
- ⚠ Release pressure in the system before working on the natural gas system. Connecting and carrying out Guided Function "“Releasing pressure in the natural gas high-pressure line”". — Carefully loosen unions of high-pressure lines (1) to allow remaining gas to leak out. [Note: When loosening the high-pressure lines, counterhold on unions with a suitable tool (arrows).]
- Remove high-pressure lines from connections.
- Position engine and gearbox jackV.A.G 1383 A(1) below support of fuel tanks (2).
- Release fuel tank support on both sides (arrows).
- Slowly lower engine and gearbox jackV.A.G 1383 A.
- Release securing straps of fuel tanks (arrow).
- If one tank or the tank shut-off valve is to be exchanged, empty tank . [Note: When the fuel tanks have to be stored temporarily, use bracket T10351 for this purpose.]
Ask TorqFix about your Audi BCA — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
Ask about your Audi BCA — free → or sign up free to see the drawingsOther AUDI procedures
- Checking for leaks – Audi A3
- Removing and installing fuel gauge sender · 1 torque figures
- Checking fuel pressure regulator and holding pressure
- Removing and installing accelerator module, engine codes BGU, BSE, BSF, CHGA · 1 torque figures
- Renewing paper filter on vaporiser
- 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
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.