Intake Manifold Flap, Assembly Overview

Intake Manifold Flap, Assembly Overview (Engine Code BEW)

The variable intake manifold is switched depending on engine speed and accelerator pedal position.







1. 22 Nm
2. Connecting pipe
3. Seal
4. Intake manifold - upper part
5. O-ring
6. EGR vacuum regulator solenoid valve -N18-
7. 10 Nm
8. O-ring
9. Intake manifold flap
- With Motor for intake manifold flap -V157-
10. 10 Nm
11. Seal
12. Seal
13. Selector shaft

NOTE: The selector shaft must not be loaded axially - Danger of damage.

14. Intake manifold - lower part
- With selector shaft

15. 10 Nm
- Note tightening sequence
16. 22 Nm
17. Bracket
18. 10 Nm
19. Vacuum unit

NOTE: When pushing the vacuum unit lifter on the selector shaft conical journal the selector shaft must be supported with an appropriate wedge on the intake manifold lower part.

20. Vacuum hose
21. Intake manifold change-over valve -N156-
- Vacuum hose connection diagram

Disassembling and assembling variable intake manifold

NOTE: Tighten the variable intake manifold in the described sequence to avoid distortion.

- Remove variable intake manifold.
- Loosen connecting bolts.
- Disconnect upper and lower parts of intake manifold. Separate both parts with light blows of a rubber-headed hammer if necessary.
- Clean contact surface.
- Replace seal.
- Put upper and lower parts of intake manifold together and tighten all connecting bolts hand-tight.







- Tighten all securing bolts in indicated sequence to 10 Nm.
- Install variable intake manifold.