Removing and installing natural gas tank 5, Caddy Maxi — AUDI
Removing and installing natural gas tank 5, Caddy Maxi on Audi: 17 steps, 1 torque figure, engines BCA, BGU, BSE, BSF.
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
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- The handwheels for mechanical shut-off valves have been discontinued.Close the mechanical shut-off valves using a commercially available spanner.
- Then a leak test must performed by a technical expert .
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 15 Nm (11 lb-ft) | Tighten bolt (1) to specified torque |
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.
📐 57 workshop diagrams for BCA
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- ⚠ 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”". — Remove protective covers on underbody:
- Close mechanical shut-off valve (2) on all natural gas tanks. [Note: The handwheels for mechanical shut-off valves have been discontinued.Close the mechanical shut-off valves using a commercially available spanner.]
- Separate connectors (1) from tank shut-off valve on all natural gas tanks.
- Carefully loosen unions of high-pressure lines (arrows) to allow remaining gas to leak out.
- Remove high-pressure lines from tank shut-off valve.
- Place engine and gearbox jackV.A.G 1383 A with bracketT 10351 under tank to support it.
- Loosen securing straps (arrows).
- Secure natural gas tank (2) on engine and gearbox jackV.A.G 1383 A(1) with securing straps.
- Slowly lower engine and gearbox jackV.A.G 1383 A.
- If natural gas tank or tank shut-off valve is to be exchanged, empty natural gas tank .
- Install natural gas tank mounting (arrow A).
- Check inner sides of securing straps for soiling (arrow B), clean as required.
- Place natural gas tank (1) in mountings (arrow).
- Hook securing strap locking devices in position (arrow) and move natural gas tank to installation position Assembly overview.
- Tighten bolt (1) to specified torque of 15 Nm. — 15 Nm (11 lb-ft)
- Once high-pressure lines are installed, open mechanical shut-off on tank shut-off valve.
- Then a leak test must performed by a technical expert .
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
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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.