Intake Manifold: Testing and Inspection

Vacuum Reservoir in Intake Manifold, Checking for Leaks

Special tools, testers and auxiliary items required

• Hand vacuum pump (VAS 6213)

Work procedure

- First check whether all vacuum hoses on intake manifold are undamaged and connected correctly.

- Remove vacuum hose from Intake Manifold Runner Control (IMRC) valve (N316) on intake manifold.

- Position slide ring - 1 - on hand vacuum pump (VAS 6213) in - A - position for "Vacuum".





- Connect hand vacuum pump (VAS 6213) to intake manifold connecting pieces.

- Generate 0.3 bar vacuum using hand vacuum pump.

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

- Check display on hand vacuum pump (VAS 6213) pressure gauge after 3 to 5 minutes.

- If pressure continues to be 0.3 bar, vacuum reservoir in intake manifold is OK.

- If pressure falls, replace intake manifold.