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Checking intake manifold change-over: Audi 1.6 (BGU, BSE, BSF, CFPA, …)

Step-by-step checking intake manifold change-over for the Audi 1.6: 14 steps. What to remove, in what order, and what to check after.

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

14 steps 7 engine codes engine codes merged from 5 documented variants

🧭 Before you start

Fits: VW Caddy III (2K, 2004–2015); platform code 2C0

  • Renewed: upper part of intake manifold

Don't miss

  • The vacuum unit for intake manifold change-over is integrated in the intake manifold and is not visible from outside.

🔧 Engine codes this applies to

BGUBSEBSFCFPACHGACJKACJKB

📐 56 workshop diagrams for BGU

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

Checking intake manifold change-over — BGU · diagram 1
Checking intake manifold change-over — BGU · diagram 2
Checking intake manifold change-over — BGU · diagram 3
Checking intake manifold change-over — BGU · diagram 4
Checking intake manifold change-over — BGU · diagram 5
Checking intake manifold change-over — BGU · diagram 6
Checking intake manifold change-over — BGU · diagram 7
Checking intake manifold change-over — BGU · diagram 8
+ 48 more diagrams
🔒 56 workshop diagrams for this job Ask about your Audi BGU — free or sign up free to see the drawings

📋 Procedure

  1. Check that vacuum lines are correctly connected.
  2. Check vacuum hoses for porosity.
  3. Check vacuum system for leaks.
  4. Pull vacuum hose to actuator for intake manifold changeover (arrow) off intake manifold changeover valve (1). [Note: The vacuum unit for intake manifold change-over is integrated in the intake manifold and is not visible from outside.]
  5. Connect hand vacuum pump with accessoriesV.A.G 1390 to vacuum testerV.A.G 1368 -connection B-.
BGU? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Connect vacuum hose for actuator to vacuum testerV.A.G 1368 -connection A-.
  2. Set vacuum testerV.A.G 1368 to -A/B- position.
  3. Operate hand vacuum pump with accessoriesV.A.G 1390 several times. Build up vacuum to 500 millibars max.
  4. Vacuum must not drop.
  5. Renew upper part of intake manifold.
  6. Check switchover mechanism in the intake manifold for ease of movement.
  7. Remove lower part of intake manifold.
  8. Repeat leak test on the vacuum actuator. Check whether intake manifold flap moves.
  9. Renew upper part of intake manifold.
Workshop diagrams

Ask TorqFix about your Audi BGU — 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 Audi BGU — free → or sign up free to see the drawings

Other AUDI 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.