With One Piece Intake Manifold

Vacuum Reservoir in Intake Manifold, Checking for Leaks

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAS 6213) or hand vacuum pump (VAG 1390)

Test Conditions

Perform a visual inspection to check whether all vacuum hoses on intake manifold are not damaged and connected correctly.

Test Sequence

- Disconnect vacuum hose --> [ (Item 14) To ] from Intake Manifold Runner Control (IMRC) valve (N316) from intake manifold.

When using the hand vacuum pump (VAS 6213):

- Set the slide ring - 1 - on hand vacuum pump (VAS 6213) to position - A - for " vacuum".





- Connect hand vacuum pump (VAS 6213) to connection of intake manifold.

- Operate hand vacuum pump until a vacuum of 0.3 bar has been attained on the pressure gauge.

• Due to the large volume in the vacuum reservoir, up to 30 strokes may be required to generate a vacuum 0.3 bar.

- Observe pressure for approximately 3 to 5 minutes.

If vacuum remains at 0.3 bar:

Vacuum reservoir in intake manifold is OK.

If vacuum drops.

- Replace intake manifold.