Checking vacuum unit in intake manifold upper part for leaks — AUDI

🧭 Before you start

Fits: platform code 2C0

• Renewed: upper part of intake manifold

Don't miss

• The actuator for the variable intake manifold change-over valve is integrated in the intake manifold and is not therefore visible from the outside.

🔧 Engine codes this applies to

📐 26 workshop diagrams for CHGA

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

📋 Procedure

1. Pull vacuum hose to actuator for intake manifold changeover (arrow) off at the intake manifold changeover valve (1). [Note: The actuator for the variable intake manifold change-over valve is integrated in the intake manifold and is not therefore visible from the outside.]
2. Connect hand vacuum pump with accessoriesV.A.G 1390 to vacuum testerV.A.G 1368 connection B.
3. Connect vacuum hose leading to actuator to vacuum testerV.A.G 1368 connection A.
4. Set vacuum testerV.A.G 1368 to -A/B- position.
5. Operate hand vacuum pump with accessoriesV.A.G 1390 several times. Build up vacuum to 500 millibars max.

6. Vacuum must not drop.
7. Renew upper part of intake manifold.
8. Check switchover mechanism in the intake manifold for ease of movement.
9. Remove intake manifold lower part.
10. Repeat leak test on the vacuum actuator. Check whether intake manifold flap moves.
11. Renew upper part of intake manifold.

Other AUDI procedures

• Checking semi-automatic toothed belt tensioner – VW · 1 torque figures
• Sealing upper and lower covers · 3 torque figures
• Removing and installing front exhaust pipe with catalytic converter
• Removing toothed belt
• Removing and installing valve stem seals
• 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