TorqFix

Checking fuel supply line and non-return valve: VW Jetta VI / Golf V / Jetta (CAYB, CAYC, CBDA, CBDB, …)

Step-by-step checking fuel supply line and non-return valve for the VW Jetta VI / Golf V / Jetta: 16 steps.

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

16 steps 7 engine codes engine codes merged from 2 documented variants

🧭 Before you start

Fits: VW Jetta VI (16, 2010–2018), VW Golf V / Jetta (1K, 2003–2009); platform code AJ5

  • Renewed: corresponding length of hose, non-return valve

Don't miss

  • Do not use screws or threaded bolts.

🔧 Engine codes this applies to

CAYBCAYCCBDACBDBCBEACEGACJAA

📐 80 workshop diagrams for CAYB

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

Checking fuel supply line and non-return valve — CAYB · diagram 1
Checking fuel supply line and non-return valve — CAYB · diagram 2
Checking fuel supply line and non-return valve — CAYB · diagram 3
Checking fuel supply line and non-return valve — CAYB · diagram 4
Checking fuel supply line and non-return valve — CAYB · diagram 5
Checking fuel supply line and non-return valve — CAYB · diagram 6
Checking fuel supply line and non-return valve — CAYB · diagram 7
Checking fuel supply line and non-return valve — CAYB · diagram 8
+ 72 more diagrams
🔒 80 workshop diagrams for this job Ask about your VW CAYB — free or sign up free to see the drawings

📋 Procedure

  1. Remove engine cover panel .
  2. Unclip exhaust gas recirculation cooler changeover valve N345 from bracket located on front of intake manifold.
  3. Pull hose off lower connection (arrow in I) of exhaust gas recirculation cooler changeover valve N345.
  4. Seal open end of hose with a suitable sealing plug. [Note: Do not use screws or threaded bolts.]
  5. Pull vacuum hose (arrow) off connection piece of vacuum pump.
CAYB? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Connect hand vacuum pumpVAS 6213 to disconnected hose and generate a vacuum of 0.6 bar.
  2. Observe gauge of hand vacuum pumpVAS 6213 for approx. 30 seconds.
  3. Locate damage or leak in hose and replace corresponding length of hose.
  4. First pull hose off hand vacuum pumpVAS 6213.
  5. Remove sealing plugs from hose ends.
  6. If the non-return valve functions properly, a clear hiss is audible when vacuum in vacuum reservoir is released.
  7. Renew non-return valve .
  8. If the non-return valve functions properly, a clear hiss is audible when vacuum in vacuum reservoir is released.
  9. Renew non-return valve .
  10. Reconnect all disconnected vacuum hoses.
  11. Check control line to turbocharger .
Workshop diagrams

Ask TorqFix about your VW CAYB — 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 CAYB — 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.