TorqFix

Checking lines to fuel tank and fuel cap — VW

Checking lines to fuel tank and fuel cap on VW: 10 steps, engines ADX, AEA, AEE, AER. What to remove, in what order, and what to check after.

Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.

10 steps 14 engine codes engine codes merged from 3 documented variants

🧭 Before you start

Fits: platform code 6N1

  • Renewed: fuel tank cap

Don't miss

  • Operate hand-operated vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
  • If fuel level in tank is low the hand vacuum must be operated at least 20...30 times.

🔧 Engine codes this applies to

ADXAEAAEEAERAEVAEXAKVALDALLANVANXAPQAUCAUD

📐 9 workshop diagrams for ADX

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

Checking lines to fuel tank and fuel cap — ADX · diagram 1
Checking lines to fuel tank and fuel cap — ADX · diagram 2
Checking lines to fuel tank and fuel cap — ADX · diagram 3
Checking lines to fuel tank and fuel cap — ADX · diagram 4
Checking lines to fuel tank and fuel cap — ADX · diagram 5
Checking lines to fuel tank and fuel cap — ADX · diagram 6
Checking lines to fuel tank and fuel cap — ADX · diagram 7
Checking lines to fuel tank and fuel cap — ADX · diagram 8
+ 1 more diagrams
🔒 9 workshop diagrams for this job Ask about your VW ADX — free or sign up free to see the drawings

📋 Procedure

  1. Pull vent hose (1) from fuel tank off activated charcoal filter (2).
  2. Then connect hand vacuum pumpV.A.G 1390 and vacuum testerV.A.G 1368 as shown to hose (1).
  3. Set vacuum tester to -A/B- position.
  4. Remove fuel filler cap.
  5. Operate hand-operated vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
ADX? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Check gravity/overflow valve .
  2. Check line (1) from fuel tank for free-flow.
  3. Refit fuel filler cap.
  4. Operate hand-operated vacuum pumpV.A.G 1390 several times. Vacuum must not build up. [Note: If fuel level in tank is low the hand vacuum must be operated at least 20...30 times.]
  5. Renew fuel tank cap.
Workshop diagrams

Ask TorqFix about your VW ADX — 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 VW ADX — free → or sign up free to see the drawings

Other VW procedures

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.