Checking fuel tank breather — AUDI

🧭 Before you start

Fits: platform codes SF, SG

Don't miss

• Operate hand vacuum pumpVAS 6213 several times. Vacuum must not build up.

🔧 Engine codes this applies to

📐 17 workshop diagrams for BSX

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Unclip breather line (3) from retainer (2).
2. Release breather line (3) on push-fit coupling and pull off. Separate plug-in connectors .
3. Using a connecting nippleVAS 6550/3-1 and a standard hose, connect hand vacuum pumpVAS 6213 to line leading to active charcoal filter system solenoid valve 1N80.
4. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (B) for "“pressure”".
5. Using hand-operated vacuum pumpVAS 6213, build up pressure of approx. 0.1 bar.

6. When doing this, observe the activated charcoal filter solenoid valve 1N80(2) is closed when not supplied with current.
7. Ignition off and release and separate connector on activated charcoal filter solenoid valve 1N80(2).
8. Check line leading to activated charcoal filter solenoid valve 1N80 for leaks and damage. If no fault is detected, the solenoid valve N80 is leaking. Renew solenoid valve N80.
9. Unclip breather line (3) from retainer (2).
10. Release breather line (3) on push-fit coupling and pull off. Separate plug-in connectors .
11. Using adapterVAS 6550/3-2, connect hand vacuum pumpVAS 6213 to line leading to activated charcoal filter.
12. Remove front left underbody cladding (arrow).
13. Pull off breather line (3) from activated charcoal filter (1).
14. Seal connections (B and C) using suitable plugs from engine bung setVAS 6122.
15. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (A) for "“vacuum”".
16. Operate hand vacuum pumpVAS 6213 several times. Vacuum must not build up.
17. Activated charcoal filter and breather line are not leaking.
18. Disconnect breather lines (3 and 4) from activated charcoal filter (1).
19. Seal breather connection (B and C) using suitable plugs from engine bung setVAS 6122.
20. Connect hand vacuum pumpVAS 6213 to connection (A) of activated charcoal filter (1) using commercially available hose.
21. Operate hand vacuum pumpVAS 6213 several times.
22. Activated charcoal filter is leak-tight.
23. Check breather line to activated charcoal filter system solenoid valve 1N80.

Other AUDI procedures

• Removing and installing sealing flange on gearbox side · 6 torque figures
• Removing and installing sealing flange on pulley end – VW · 6 torque figures
• Removing and installing crankshaft sealing flange on gearbox side · 4 torque figures
• Removing and installing engine control unit J623 – VW · 6 torque figures
• Removing and installing fuel delivery unit, fuel gauge sender · 2 torque figures
• 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