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Checking supply line, vacuum reservoir and non-return valve — VW

Checking supply line, vacuum reservoir and non-return valve on VW: 15 steps, engines CAYC, CBAA, CBAB, CBAC.

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

15 steps 25 engine codes engine codes merged from 8 documented variants

🧭 Before you start

Fits: platform code A32

  • Renewed: piece of hose, check valve

Don't miss

  • Do not kink, twist or crush the vacuum lines when routing. This may cause breakdowns. — Remove engine cover panel .
  • Do not use screws or threaded bolts.

🔧 Engine codes this applies to

CAYCCBAACBABCBACCBBACBBBCBDACBDBCBDCCFFACFFBCFFDCFFECFGBCFGCCFHBCFHCCFHFCFJACFJBCJAACLCACLCBCLJACLLA

📐 64 workshop diagrams for CAYC

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

Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 1
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 2
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 3
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 4
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 5
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 6
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 7
Checking supply line, vacuum reservoir and non-return valve — CAYC · diagram 8
+ 56 more diagrams
🔒 64 workshop diagrams for this job Ask about your VW CAYC — free or sign up free to see the drawings

📋 Procedure

  1. ⚠ Do not kink, twist or crush the vacuum lines when routing. This may cause breakdowns. — Remove engine cover panel .
  2. Pull off vacuum hose (II)on the charge-pressure control solenoid valve N75.
  3. Seal hose ends with suitable plugs. [Note: Do not use screws or threaded bolts.]
  4. Pull off vacuum hose (arrow) from the vacuum pump connection.
  5. Connect hand vacuum pumpVAS 6213 to the disconnected hose.
CAYC? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (A) for "“vacuum”".
  2. Generate a vacuum of 0.6 bar.
  3. Watch the gauge of the hand vacuum pump for about 30 sec.
  4. Find damage or leaking connections in the hose and replace the piece of hose.
  5. Pull hose off the hand vacuum pumpVAS 6213.
  6. Remove one of the plugs from the hose end.
  7. If the non-return valve functions properly, a clear hiss is audible when vacuum in vacuum reservoir is released.
  8. Replace check valve.
  9. Reconnect vacuum hoses.
  10. Checking control line to turbocharger .
Workshop diagrams

Ask TorqFix about your VW CAYC — 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 CAYC — 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

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Workshop data on this page last updated 20 Sep 2026.