9-3 (9440) V6-2.8L Turbo (2008)
Index:
1. Venturi
2. Camshaft cover connection
3. Brake servo connection
4. Intake manifold connection
5. Check valves
6. Chamber
7. Jet
The venturi (1) has three connections. One of the venturi connections is held by barbs and is sealed with an O-ring. This is connected directly to
the camshaft cover (2) on the rear cylinder bank. On the vacuum hose (4) that is connected to the intake manifold there is a check valve. The
difference in pressure between the two connections provides an airflow through the jet (7).
As the inlet in the jet is tapered, the speed of the passing air will be increased to create an ejector effect that increases the negative pressure in the
hose connected to the brake servo (3). To prevent air flowing in the wrong direction through the chambers (6) to the brake servo, the venturi is
equipped with check valves (5).