Vacuum Booster Hose and Its One-Way Valve — Replacement (Opel Omega B2)

During the manufacturing process, the vacuum hose is pressed onto the one-way valve under the influence of heat, so when replacing the valve for the first time, it is necessary to install a normal vacuum hose and attach it to the valve with clamps. After that, the hose and valve can be replaced separately.

1. Unscrew the hose union nut near the intake manifold.

2. Pull the elbow out of the booster. Note that on some models the elbow and hose are connected using what is called a quick-release clamp. In this case, press the clamp latch and disconnect it.

3. Release the hose from the plastic holders. Where necessary, disconnect the vacuum hose from the T-piece.

4. Cut the hose near the one-way valve, elbow pipe and intake manifold coupling.

5. Install new vacuum hoses and secure them to the one-way valve, elbow, and union with clamps. Make sure the arrows on the valve point toward the intake manifold.

6. Push the elbow into the booster sealing ring and tighten the union nut onto the intake manifold. Secure the hose with new plastic ties. Connect the small-gauge vacuum hoses to the T-connectors.

7. Check the operation of the vacuum booster and the entire brake system.