Checking the tightness of the vacuum receiver in the intake manifold (VW Passat B6)

Verification conditions

Inspect and ensure that all vacuum hoses on the intake manifold are not damaged and are properly connected.

Verification procedure

Disconnect the vacuum hose from the intake manifold flap valve to the intake manifold from the intake manifold (Fig. 2.69).

Connect a hand vacuum pump to the intake manifold.

Tighten the knurled bolt on the vacuum pump.

Operate the hand vacuum pump until the pressure gauge reads 0.3 bar.

Note: To create a vacuum of 0.3 bar, due to the large volume in the vacuum receiver, it may be necessary to pump up to 20 times.

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Monitor the pressure for about 3-5 minutes.

If the vacuum remains at 0.3 bar, the vacuum receiver in the intake manifold is working properly.

If the pressure increases, replace the intake manifold.