Opel Corsa B 1993–2000 Service and Repair Manual: Brake servo vacuum hose and non-return valve - renewal

1. The plastic hose fitted as original equipment cannot be re-used; to renew the valve, the hose must therefore be renewed as well. A serviceable valve can, however, be transferred to the new hose.

2. Unscrew the hose union nut at the inlet manifold (see illustration).

Braking system
Brake servo vacuum connection at inlet manifold (fuel injection model)

3. Pull or prise the elbow connector out of the servo (see illustration).

Braking system
Brake servo vacuum connection at servo

4. Cut the hose off the non-return valve, the elbow and the manifold connectors.

5. Cut the new hose to length - it is sold by the yard - and secure it to the valve and fittings using hose clips. Make sure that the arrows on the valve point towards the manifold.

6. Refit the connectors to the manifold and to the servo.

    Pressure regulating valves - testing, removal and refitting
    Testing 1. Accurate testing of either type of pressure regulating valve (master cylinder mounted or underbody mounted) is not possible without special equipment. Malfunction may be suspected if th ...

    Vacuum servo unit - testing, removal and refitting
    Testing 1. To establish whether or not the servo is operating, proceed as follows. 2. With the engine not running, apply the brake pedal several times to exhaust any residual vacuum. 3. Hold the ...

    See also:

    Opel Corsa Owners Manual. Seat position
    Warning: Only drive with the seat correctly adjusted. ■ Sit with buttocks as far back against the backrest as possible. Adjust the distance between the seat and the pedals so that legs a ...