Removing and installing filling connection, Golf Estate: VW (CPWA)

🧭 Before you start

Fits: VW Golf VII Variant (BA), VW Golf VII (5G, 2012–2020)

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• Counterhold using a suitable tool while doing so.

🔧 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. Observe safety instructions .
2. Observe rules for cleanliness .
3. Take care not to damage surfaces when working on fuel tanks.
4. If necessary, protect surface with suitable workshop equipment.
5. Remove underbody cover beneath fuel tank General body repairs, exterior66Underbody cover; Assembly overview – underbody cover.

6. Close fuel tank shut-off valve N361/N362 mechanically .
7. Release pressure in high-pressure line .
8. Disconnect battery Electrical system27Battery; Disconnecting and reconnecting battery.
9. Open tank flap unit.
10. Pull cap (2) off filling connection (1).
11. Clean area around fuel filler neck.
12. Unscrew cap (4) for fuel filler neck.
13. Remove tank flap unit General body repairs, exterior55Tank flap unit; Removing and installing tank flap unit.
14. Remove rear right wheel Running gear, axles, steering44Wheels, tyres.
15. Remove rear right wheel housing liner General body repairs, exterior66Wheel housing liner; Assembly overview - rear wheel housing liner.
16. Carefully loosen union nut on connecting piece (1) to allow remaining gas to escape.
17. Counterhold using a suitable tool while doing so.
18. Unscrew fuel line (2) from connecting piece (1) and remove it.
19. Seal open connections using suitable plugs from engine bung setVAS 6122.
20. Unclip fuel line (1) from retainer (arrow).
21. Loosen and unscrew nut (2) on filling connection (1) in (direction of arrow).
22. ⚠ Left-hand thread! — Unscrew bolt (3) on bracket for filling connection (4).
23. Unscrew bolts (arrows) on bracket for filling connection (1).
24. Remove bracket .
25. Remove filling connection from filler neck.
26. Guide filling connection out of underbody.
27. Apply tools for applying specified torque to filling connection (1) as shown in illustration.
28. ⚠ Left-hand thread!When tightening the nut with the aid of specified tools, set the torque wrenchV.A.G 1331 to 19 Nm. — Set torque wrenchV.A.G 1331 to 19 Nm. — 19 Nm (14 lb-ft)
29. Tighten nut (2) on filling connection (1) in direction of (arrow).
30. ⚠ Left-hand thread! — Check natural gas supply system for leaks 24Checking natural gas supply system for leaks.
31. Perform gas system test 35.1Description of work; Performing visual inspection of natural gas tanks for corrosion and leakage test.

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